Beginner MIG Welding Patterns: A Step-by-Step Guide

The first time many beginners run a MIG bead, they get a lumpy, wandering line of metal and assume their machine is broken. In most cases the machine is fine — what’s missing is a deliberate hand pattern, a steady travel speed, and the discipline to move the gun the same way every pass.

Why Your MIG Welding Pattern Decides How the Weld Looks and Performs

A MIG welding pattern is the deliberate path your hand traces along the joint: the exact sequence of moves you make with the gun while the wire is feeding. It is not a style choice. It is the instruction that tells the arc where to put heat, where to hold it, and where to move on. Get the pattern right and the machine does what it was built to do. Get it wrong and no dial on the front of the welder will save the bead.

What GMAW Actually Is, and Why Beginners Start With Short-Circuit MIG

MIG welding is formally called gas metal arc welding, or GMAW. The defining feature is that the weld pool is shielded by an externally supplied shielding gas from a cylinder, which distinguishes it from flux-cored and stick processes that generate their own shielding from a flux coating. The wire electrode feeds continuously through the gun, melts into the joint, and the process keeps running as long as you hold the trigger.

Within GMAW there are several metal transfer modes. The one almost every home shop and beginner runs is short-circuit transfer, where the wire touches the joint, short-circuits, melts off, and repeats dozens of times per second. The practical result is low heat input, small manageable puddles, and much easier control out of position. That is exactly why short-circuit MIG is the friendliest process for a first bead, and why beginner MIG welding patterns are worth learning properly from day one.

The Symptom You Have Probably Already Seen

Here is the familiar beginner result: a wormy, uneven bead that wanders off the chalk line, thick in one spot and thin in the next, sometimes drifting over the edge of the joint. The reflex is to blame wire feed speed or voltage. Often the settings are fine. The real culprit is an undisciplined hand: jerky starts, changing speed halfway along, lifting the gun, or twisting the wrist instead of moving in a controlled line.

Because the puddle is small in short-circuit transfer, it reacts almost instantly to motion. Speed up and the bead narrows and stands up. Slow down and it flattens and widens. Pause in one spot and you build a lump or burn a crater. Every change is a direct readout of the pattern your hand just traced.

What You Gain From Mastering Patterns First

Learning patterns deliberately pays off faster than almost any other skill:

• Consistent reinforcement. A repeatable motion produces beads of the same height and width along the entire length.
• Fewer discontinuities. Steady travel and correct dwell reduce undercut, cold lap, porosity from arc wander, and start-stop craters.
• Less spatter. A stable arc at a consistent length does not spit the way a wandering arc does.
• Out-of-position control. Once the motion is automatic, you can weld vertical or overhead without thinking about your hands.
• The ability to read your own work. A consistent baseline makes it obvious when a bead has gone wrong and why.

Those benefits carry into every material you touch later, whether you are running mild steel practice plates or moving on to the techniques covered in Aluminum MIG Welding: The Complete Practical Guide, where heat control matters even more.

The “Stack of Dimes” Myth

Everyone chases the stack-of-dimes look: evenly spaced, identical ripples that look machined. It is a useful sign of a steady hand, but it is not proof of a good weld. Ripples record how the puddle solidified behind the arc, and they can form on a weld with poor fusion, insufficient penetration, or contaminated metal underneath. Conversely, a sound, fully fused weld can have a somewhat duller surface.

Think of appearance as a symptom, not a verdict. The real question is whether the weld fused the joint, and fusion comes from correct settings, angle, speed, and a pattern that keeps the arc in the puddle rather than on cold base metal.

A Quick Safety Frame

Pattern practice means repeated hot work in a small area. Under OSHA’s general welding, cutting and brazing standard, 29 CFR 1910.252, ventilation, fire protection and hot-work controls apply to exactly this kind of operation. Clear the combustibles, ventilate, and secure your cylinders before you strike an arc, then focus entirely on the motion. Also make sure the joint itself is clean, since pattern work cannot fix a contaminated surface, as covered in Aluminum Cleaner for Welding: How to Prep Aluminum Right.

The rest of this guide builds from this foundation: the two pattern families, the setup they depend on, and the drills that turn a wandering line into a repeatable bead.

Stringer Beads vs. Weave Patterns: The Core Comparison

Every bead you will ever run with a MIG gun belongs to one of two families: the stringer and the weave. Learning to spot the difference, and knowing which one a joint is asking for, is the single most useful mental model a beginner can build. These two families are the backbone of beginner MIG welding patterns, and almost every technique you meet later is a variation of one of them.

What a Stringer Bead Actually Is

A stringer is a straight, non-weaving pass. The gun travels along the joint centerline and the arc stays in one narrow place, moving forward at a steady pace. There is no side-to-side swing. Some welders add a slight forward drag or a tiny jitter to help the puddle wet into the toes, but the arc path itself stays essentially linear. Because the heat stays concentrated on a small spot, a stringer drives deeper per pass than a wider motion covering the same metal, which is why procedure writers favor it for root passes and thin material.

What Counts as a Weave

A weave is any deliberate oscillation across the joint: zigzag, crescent, overlapping circles, figure-eight, and the J-weave or pyramid all live in this family. The arc swings from one side of the puddle to the other, then steps forward. Weaves earn their keep when a single bead has to cover ground that a stringer cannot, such as a wide bevel, a capping pass over several stringers, or a fillet cap on a heavy T-joint. The mechanics of each motion are covered in detail later, but the trade-off is already clear: wider coverage, more manipulation, more that can go wrong.

Why Stringers Get the Default Vote

AWS-derived procedure guidance generally prefers stringer beads for the same reasons: they produce a finer, more refined grain structure in the deposited metal, they keep total heat input lower, and they are far easier to repeat consistently. A weave keeps the arc hovering over the same zone longer, so the puddle stays hot and fluid for more of the pass. On a wide, slow weave, that extra heat can soften the heat-affected zone, widen the bead, flatten the ripples, and start blowing the corner of the joint out at the edges. Weaves are justified, not forbidden, when the joint genuinely demands width and the welder has the control to manage that heat.

Two Rules That Keep Weaves Safe

The first rule is dwell. Undercut at the toes of a weave is almost always caused by the arc edge blowing out the corner and moving on before filler metal fills it. The standard fix is a brief pause at each side of the weave, letting the puddle catch up and wash into the joint wall before you swing back. The second rule is width. Most guidance keeps the oscillation to roughly two to two-and-a-half times the electrode or core wire diameter, with some beginner-focused instruction allowing up to about three times. Past that limit the pool spreads, gravity starts pulling on it, and heat builds faster than the travel speed can carry it away. In practice, keeping weaves narrow is the cheapest insurance against both undercut and overheating.

Factor	Stringer bead	Weave pattern
Penetration	Deeper and more concentrated per pass	Shallower, spread across the width
Heat input	Lower; arc dwells over a small zone briefly	Higher; arc stays in the joint longer
Appearance	Narrow with tight, even ripples	Wider and flatter; ripples easy to blur
Best use	Root passes, thin stock, most flat work	Wide grooves, cover passes, large fillet caps
Difficulty	Simple motion, demanding consistency	Rhythm, dwell and speed all at once

Read the table left to right and the pattern becomes obvious: a stringer gives you one variable to control, while a weave adds rhythm and timing on top of travel speed. Master the straight pass first. Once your stringers are uniform and properly tied in at the toes, adding a controlled weave is a small step rather than a leap, and you will be able to feel immediately when the weave is working and when it is simply cooking the joint.

Machine Setup Comes Before Any Pattern

No hand pattern fixes a badly set-up machine. Trace a textbook zigzag or stringer with the wrong voltage and wire feed speed, and the result is still ugly. The machine has to feed you a puddle that behaves before your hand movement matters at all.

Wire Feed Speed and Voltage Work as a Pair

These two dials are partners. Wire feed speed (WFS) effectively sets your amperage: more wire per minute means more current, which controls how much metal you deposit and how hot the plate gets. Voltage sets arc width, length, and fluidity, deciding how the puddle wets out and how flat or roped the bead lays.

Push WFS up without enough voltage and you get stubbing, the wire hitting cold metal faster than it melts, with an arc that rattles like a machine gun. Push voltage without enough wire and the arc runs long and harsh. The benchmark for short-circuit MIG is the steady, crisp sound of frying bacon: a consistent sizzle, never popping or hissing. Right sound plus a flat, wetted bead means your settings are in the ballpark.

Polarity and Shielding Gas: Get These Right First

Solid GMAW wire, the common ER70S-6 mild steel wire, runs on electrode positive, or DCEP. Reverse the leads and it barely heats up, birdnesting and sputtering instead of feeding cleanly. Self-shielded flux-core wire is the exception, running electrode negative, which is why mixing the two causes such confusing problems.

Gas matters more than beginners expect. A 75% argon / 25% CO2 blend is the most common choice for short-circuit MIG on mild steel: the argon calms the arc, cuts spatter compared with 100% CO2, and leaves a smoother, more evenly rippled bead that is easier to run a consistent pattern into. Pure CO2 costs less and penetrates deeper, but it spatters harder and leaves a rougher, more convex profile, so 75/25 is the forgiving choice while you learn.

Every wire and base metal pairing needs its own gas. MIG welding aluminum calls for 100% argon and a different machine preparation entirely, as covered in Aluminum MIG Welding: The Complete Practical Guide, while flux-cored aluminum work has its own constraints, set out in Aluminum Flux Core Welding: What Actually Works in 2026. Buying cylinders and regulators locally? Knowing what you are paying for helps, which is where AllGas Welding Supply: Gases, Services & Safety Guide comes in handy.

Contact Tip-to-Work Distance and Gun Condition

Stickout, the gap between contact tip and workpiece, sits around 3/8 to 1/2 inch for short-circuit MIG. Too close gives excessive spatter, a frozen tip, and an arc that gouges instead of flows. Too far and the arc turns diffuse, shielding coverage drops, and you lose the crisp control a beginner needs.

Check the gun liner and cable too. A kinked cable, dirty liner, or worn contact tip creates drag that shows up as surging, inconsistent wire delivery, and no hand pattern compensates for wire that arrives in pulses.

Clean, Fit, and Prepare the Joint

Pattern practice is wasted on a contaminated joint. Wipe off cutting oil, remove heavy mill scale with a flap disc, and check fit-up: a bevel or small root gap lets the arc reach the bottom of a thick joint instead of skating across the top. Aluminum is harsher still, and the oxide removal it demands is covered in Aluminum Cleaner for Welding: How to Prep Aluminum Right.

How Voltage Interacts With Your Pattern

Setup and technique collide here. Too hot, and a weave washes out the toes of the joint, bites into the plate edges, and leaves undercut however carefully you dwell. Too cold, and straight stringers pile up proud of the plate without wetting in — the classic cold lap or lack of fusion that ESAB identifies as a recurring MIG defect. Read the puddle: fluid and wide means back off the heat; stiff, lumpy, and reluctant to wet means add it.

Building a Starting-Point Settings Framework

You do not need a chart memorized; you need a method. Start with your machine’s recommended settings for the wire diameter and plate thickness in front of you, treat that as a starting point rather than gospel, and change one variable at a time on a scrap coupon of the same material. Run a bead, look at it, change one thing, run again.

Once the machine gives you a stable, crisp arc and a puddle that wets evenly into clean plate, you have something worth shaping with your hand. That is when the patterns ahead start to make sense.

The Stringer Bead: The First Pattern Every Beginner Should Master

Every other pattern in this guide builds on one movement: the straight stringer. A stringer is a narrow, non-weaving bead pushed or pulled along the joint in a single line. It looks simple and it is simple, which is exactly why beginners rush past it. Spend two solid weeks on nothing but stringers and everything that follows will feel easier.

Get Your Body and Gun Set Before You Strike an Arc

Bad beads usually start before the wire does. Sit or stand so your travel path is comfortable and square to the joint, with your forearms supported and your wrist free. Brace the gun hand against something solid — a gloved knuckle resting on the plate, a finger hooked over the nozzle shroud, or a fixture — so the gun moves as one unit instead of wobbling. If you have to stretch or twist halfway through the bead, your body is telling you the setup is wrong.

Two angles matter from the first second:

• Work angle: on flat plate, hold the gun at 90 degrees to the surface, centered on the joint. On a T-joint this changes to roughly 45 degrees, splitting the difference between the two plates.
• Travel angle: drag the gun so the nozzle trails the direction of travel by about 10 to 15 degrees. Dragging is the default for short-circuit MIG because it points the arc into the puddle, improves gas coverage, and gives a clearer view of the leading edge. MIG technique guides reinforce the same starting point for beginners.

Keep your contact tip-to-work distance consistent, roughly 3/8 to 1/2 inch. As you travel, the stickout naturally grows if you lift the gun, which softens the arc and changes the bead mid-run. Move your arm or body to keep that gap steady.

Start, Travel, and Stop

Strike the arc slightly ahead of your start point or on a cold spot, let the puddle form for a beat, then begin moving. Your travel speed is tied directly to puddle width: the goal is a puddle that stays a consistent width and wets evenly into both toes of the joint.

The Visual Feedback Loop: Watch the Puddle, Not the Arc

The single most useful habit a beginner can build is watching the leading edge of the molten puddle instead of the bright arc itself. The puddle is honest; the arc is blinding. Puddle width becomes your speed gauge, and once you learn to read it, corrections happen automatically.

What you see	What it means	Correction
Narrow, high, ropey bead with stiff edges	Traveling too fast, not enough heat or dwell	Slow down slightly, or nudge wire speed/voltage up
Wide, flat bead that looks washed out	Traveling too slow, puddle overheated	Speed up, keep the puddle tight
Consistent width, smooth ripples, toes wetted flat	Correct speed and angle	Lock in that rhythm
Wandering line with lumpy ripples	Jerky hand motion or unstable stickout	Brace the hand, move from the shoulder

Notice that none of these fixes require touching the machine dial first. Most “bad settings” reports from new welders are actually travel speed problems in disguise, a point Miller’s beginner MIG guidance makes repeatedly.

Practice Drills That Actually Build Skill

Plate is cheap and ruined plate is still useful. Try this progression:

1. Chalk-line beads: snap a straight chalk line on clean mild steel plate and run a stringer directly on it, full length, no stopping. Judge yourself on whether the bead covers the line evenly.
2. Parallel beads: run a second bead 1/2 inch from the first. Repeat across the plate, keeping spacing and width uniform. Uniformity, not beauty, is the score.
3. Start-and-stop drills: deliberately stop, fill the crater, and restart three or four times in one pass line. This builds restart confidence for real joints.
4. Position drills: repeat the same beads in horizontal and overhead to feel how gravity changes travel speed.
5. Applied practice: move to groove and fillet coupons, then a simple bracket. If you branch into non-ferrous work, the puddle-reading habit transfers directly to aluminum MIG welding, though aluminum punishes hesitation far faster than steel.

Evaluate each session on four things: consistent bead width, even ripple spacing, full tie-in at both toes, and zero undercut. If a bead fails those checks, it fails whether it looks attractive or not. That objective standard is what turns a week of scattered practice into the deliberate control you need for weaves in the next section.

Weave Patterns Explained: Zigzag, Crescent, Circles, and Figure-Eight

Once a beginner is comfortable running straight stringers, the temptation is to start moving the gun side to side. That motion is what welders call a weave, and every weave you will ever see described is really a variation of five basic shapes: the zigzag, the crescent, the circle, the figure-eight, and the J. Each has a specific job, a specific rhythm, and a specific way of going wrong.

The Zigzag (Sawtooth)

The zigzag is the simplest weave: a steady, even side-to-side motion tracing a sawtooth path along the joint. You swing to one side, pause briefly so the puddle wets into the toe, swing across to the other side, pause again, then step forward. Those tiny pauses at each edge are the whole point. Without them the arc keeps moving and leaves the sidewall behind, which shows up later as undercut. Zigzags work well in fillet welds and wide butt joints where a single stringer would leave a lopsided bead.

The Crescent (Half-Moon)

The crescent weave is a series of smooth, C-shaped sweeps, almost like drawing small rainbows along the joint. Because the motion is rounded rather than angular, the puddle blends into the previous pass more gracefully, which is why the crescent is a favorite in vertical-up welding on thicker plate. The arc travels up and across in one fluid loop, and the pause happens naturally at each side of the C.

Circular and Looping Weaves

Circular weaves move the torch in overlapping circles along the joint, each loop partially covering the one behind it. The result is a wider, more evenly blended bead with soft toes, which makes looping useful for cover passes and for building up layers where you need to spread filler across a broad area. The risk is that overlapping circles add dwell time quickly, so heat climbs faster than beginners expect.

The Figure-Eight

The figure-eight lays an endless “8” on its side as you travel. Because the path constantly crosses back over its own center, it redistributes heat and blends the edges instead of hammering one spot. It is a good choice when a fillet or cover pass needs width but you want to avoid concentrating the arc along a single toe line.

J-Weave and Pyramid

The J-weave (sometimes called a pyramid weave on the way up) hooks to one side and sweeps across the root, then lifts. Welders use it on vertical-up roots because the hook gives the puddle somewhere to sit and tie into before you carry the bead across. On thin material, that same motion shrinks into a short stitch, which is really just a micro-weave.

Rhythm, Cadence, and Keeping the Arc in the Puddle

Whatever shape you choose, two rules govern it. First, step off consistently: each side-to-side cycle should advance just enough that the new puddle overlaps roughly half to two-thirds of the previous bead width. Too much step-off and you get separated crescents; too little and you sit in one place, stacking metal and heat. Second, keep the arc in the puddle. Sweep across liquid metal, not cold base metal. Chasing the arc onto unwelded plate outside the puddle is the fastest way to create edge damage and spatter.

Weaves also slow you down. You are covering more distance per inch of joint, so travel speed drops and total heat input rises. As ESAB’s defect guidance notes, excessive weaving width increases dwell on the edges, which raises the risk of undercut and produces coarser grain structure in the heat-affected zone. The practical ceiling for beginners is modest: keep the weave width to roughly two-and-a-half to three times the wire diameter unless a procedure specifically says otherwise.

Pattern	Motion	Best use	Main risk
Zigzag / sawtooth	Even side-to-side with toe pauses	Fillets, wide butt joints	Undercut if pauses are skipped
Crescent / half-moon	Smooth C-shaped sweeps	Cover passes, vertical-up	Heat buildup on long runs
Circular / looping	Overlapping circles	Wide coverage, layered build-up	Excess heat, flat washed-out bead
Figure-eight	Continuous sideways 8s	Blending edges, spreading heat	Losing forward travel rhythm
J-weave / pyramid	Hook at the root, sweep across	Vertical-up roots and fill	Cold-lap on the hooked side

Aluminum makes these habits especially visible: its wide, fluid puddle punishes slow weaves with sagging, so it pays to study Aluminum MIG Welding: The Complete Practical Guide before you experiment there. And if your weave still produces irregular ripples or uneven toes, the cause is usually motion rather than settings, which we will diagnose directly in the troubleshooting section ahead. For now, remember the hierarchy from Miller’s beginner MIG tips: pick the narrowest pattern that covers the joint, hold your pauses at the toes, and let the puddle, not the arc, set your pace.

Gun Angle, Travel Speed, and Arc Manipulation Fundamentals

You can copy a weave pattern perfectly and still end up with a bad weld, because a pattern never works alone. Every bead is the product of three variables moving together: the path your hand traces, the angle the gun points, and the speed the puddle moves. Change one and you must rebalance the other two. This section covers the two angles every welder controls and the speed discipline that makes a pattern look the way it should.

Work Angle vs. Travel Angle: Two Different Angs, Two Different Jobs

Beginners treat “gun angle” as one number, but there are two, and confusing them causes wander and uneven toes.

• Work angle is where the gun points relative to the joint geometry, side to side. On a T-joint it is the angle that splits the two plates. On a flat butt joint it is essentially straight up, 90 degrees to the surface.
• Travel angle is the tilt along the direction of travel, measured from the line perpendicular to the weld surface. A straight-up gun has a travel angle of zero. Point the gun forward in the direction you move and you have a push (forehand) angle. Trail it behind the puddle and you have a drag or pull (backhand) angle.

For short-circuit MIG, most practical guidance puts travel angle in the 5 to 15 degree range in either direction. Beyond about 15 degrees you start generating porosity and erratic arc behavior, because shielding gas gets blown away from the puddle.

Aspect	Push (gun points forward)	Drag (gun trails)
Bead profile	Flatter, wider, smoother ripples	Narrower, taller, deeper penetration
Visibility	Excellent, you see the joint ahead	Puddle partially hides the joint ahead
Penetration	Shallower in short-circuit transfer	Deeper, arc force driven into the plate
Best suited to	Thin sheet, clean mild steel, aluminum, out-of-position when visibility matters	Vertical-up, overhead, dirty or rusty joints, gap filling

Pushing drives heat forward and lets the arc preheat the joint slightly ahead of the puddle, which produces flatter, better-wetting beads and makes it the standard approach for aluminum MIG work, as covered in Aluminum MIG Welding: The Complete Practical Guide. Dragging drives arc force down into the base metal, giving deeper penetration and a more forgiving arc on material that is not perfectly clean. Neither is “correct” in the abstract; the joint decides. As a working default, drag for steel, especially out of position, and push for aluminum and thin sheet.

Travel Speed: The Hidden Variable

Travel speed is the variable beginners underestimate most. The same pattern, at the same angle, produces completely different welds at different speeds. Move too fast and the bead turns narrow, high, and ropey, the puddle never wets into the toes, and you get cold lap. Move too slow and the bead goes wide and flat, heat soaks into the plate, and on thin material you burn through.

The best speed gauge is puddle width, not a stopwatch. Pick a target bead width for your joint and settings, then adjust travel until the puddle consistently holds that width. This is why the machine settings section matters: a hotter setting lets you travel faster for the same puddle width, so whenever you change voltage or wire feed speed, expect to re-tune your speed and angles too. There is no isolated knob. For beginner guidance on tying speed to bead appearance, Miller Welds’ beginner MIG tips are a solid reference, and GoWelding’s GMAW techniques page breaks down push versus drag by application.

Body Position, Wrist vs. Arm Motion, and Gun Cable Whip

There is a simple mechanical truth: your wrist traces an arc, your arm traces a line. If you run a long bead by sweeping your wrist, the gun swings through a curve, your travel angle drifts through the pass, and the bead wanders. Move from the shoulder and, for anything longer than a few inches, move your feet. Slide your whole body along the joint at a constant rate and the gun travels in a straight line with a fixed angle. Brace your trigger hand against the plate or your other hand for short work, and rest your forearm on something solid whenever the joint allows.

Cable whip is the quiet saboteur. The gun lead has weight, and as you move along a joint it drags behind you, pulling the nozzle off line and adding a tug you subconsciously correct for. Drape the lead over your shoulder or support it, position the machine so the lead runs behind you rather than fighting sideways, and remember that a kinked or stiff liner makes this dramatically worse. If the gun feels like it is pulling itself, fix the lead before you blame your hand.

Putting It Together: Angle, Speed, and Pattern on a Fillet Weld

A T-joint is where all three variables show up at once. The work angle starts at 45 degrees, splitting the difference between the vertical and horizontal plates so the puddle wets equally into both. Pair that with a drag travel angle of roughly 10 to 15 degrees and a stringer pattern, and you have the standard small fillet setup.

When the fillet leg is large enough to need two passes, the work angle does not stay fixed. The first stringer is biased toward the horizontal plate so it ties into its toe cleanly, then the work angle shifts for the cover pass, placed toward the vertical plate toe and stacked on top of the root. The same logic scales up: big fillets are built from stacked stringers, not one giant weave, and that stacking approach carries into vertical and overhead positions, which the All Position Welding Rod Guide covers in depth.

Choosing Patterns by Joint Type and Welding Position

There is no single “best” MIG pattern, only the one that fits the joint in front of you, the position you are welded into, and the throat thickness the job demands. Once stringers and weaves feel familiar, the next skill is selection: reading a joint and knowing which motion belongs there before you pull the trigger.

Flat Butt Joints: Stringers First, Weaves Last

On a flat butt joint in plate, start with stringers. Run a root pass straight along the seam, then stack additional stringers side by side as thickness requires, tying into the previous pass by about half its width so the finished stack fills the joint without cold gaps between rows.

A weave earns its place on cover passes, where the job is to smooth and widen the final layer over already-filled metal, not to drive depth. On a beveled groove, a wide slow weave across an open root washes the top edges out while leaving the bottom untouched. Fill the groove with stringers and reserve the weave for the cap. Miller’s beginner guidance makes the same point: keep travel speed and manipulation simple until the puddle behaves predictably (MIG welding tips and techniques for beginners).

Thin Sheet: Outside Corners and Lap Joints

Outside corner joints on thin sheet are unforgiving because there is almost no heat sink behind the arc. Use a stringer, watch puddle width instead of the clock, and slow down only enough to wet both edges. If the puddle grows faster than you travel, the settings are too hot for the pattern, not the other way around. On aluminum sheet, prep matters even more since oxide hides the real melting point, which is why aluminum cleaner for welding belongs in the routine before any bead is run.

Lap joints call for a stringer with a slight drag, aimed at the top edge of the overlapping plate. The classic beginner failure is a bead that sits happily on the lower plate while never biting into that top edge. Keep the arc pointed at it and watch the toe line where the two pieces meet.

T-Joints and Fillet Welds

On a T-joint, hold a 45-degree work angle so the arc splits the difference between the vertical and horizontal plates, then run a stringer root. For larger fillet legs, stack stringers in layers rather than stretching one wide weave across the whole throat: stacked stringers give more uniform penetration per pass and keep heat input lower than a single slow weave of the same size.

Welding Position: Horizontal, Vertical, Overhead

Position changes the physics more than beginners expect, because gravity is now working on the puddle at the same time as your hand.

Position	Recommended pattern	Why / main risk
Flat	Straight stringers; weave on cover pass	Easiest puddle control; weaving here first builds bad habits
Horizontal	Stringer with slight stepped-up motion, or small triangular weave	Fights gravity sag on the bottom toe; wide weaves pile up low
Vertical-up	Crescent or J-weave with side pauses; short stitch on thin metal	Best control and penetration on thicker steel; puddle supported against gravity
Vertical-down	Narrow stringer, fast travel	Fast and low-distortion on thin gauge, but shallower penetration
Overhead	Small stringers, quick travel, low heat	Anything slow or wide drools out of the joint

Horizontal work needs deliberate anti-sag technique. The pool wants to run down and build a heavy lower toe, so a slight stepped-up motion or small triangular weave keeps depositing metal above the centerline until the joint fills level. MIG/GMAW technique guidance from welding education resources emphasizes the same stepped pattern for horizontal fillets.

Vertical-up is preferred on thicker steel because the arc digs into solid metal below it, giving deeper penetration and better pool control as it climbs. Use a crescent or J-weave, pause briefly at each side so the toes tie in, and let each small step carry the puddle upward. On thin material, drop the weave and use short stitches.

Vertical-down trades penetration for speed: it is common on thin material where fast travel and reduced distortion matter more than depth, and it produces a neat, shallow bead suited to light cosmetic work.

Overhead is the least forgiving position: small stringers, quick consistent travel, and as little heat as the settings allow. Position welding is also where many welders broaden their fundamentals beyond MIG; the all position welding rod guide shows how the same positional logic plays out in stick.

The takeaway: pick the simplest pattern that fills the joint. Stringers are the default almost everywhere, and a weave is a tool for width, not a sign of skill.

Common Beginner Pattern Mistakes and How to Troubleshoot Them

Every bead you run leaves a readable record of what your hands did. That is good news: when a weld looks wrong, the cause is usually a pattern or technique error you can name and fix on the next pass. The trick is to stop guessing and start diagnosing. Before you blame the wire or the machine, walk through the symptoms below, match them to the motion that caused them, and correct one variable at a time.

Porosity: Trapped Gas, Not Bad Wire

Porous welds show as pinholes, surface craters, or a spongy interior. Technically, porosity is a cavity-type discontinuity caused by gas becoming trapped in the weld metal as it solidifies. ESAB lists it among the most common MIG defects, with the cause almost always loss of shielding or a contaminated joint.

Pattern-wise, porosity traces back to inconsistent stickout, an arc that wanders in and out of the puddle, or travel speed that outruns the shielding envelope. A wandering hand also changes your contact tip-to-work distance mid-bead, which destabilizes the arc and lets air in. Clean the joint first: oil, mill scale, rust, and cutting fluids all cook off into gas. If you are working aluminum, surface preparation matters even more, which is why dedicated aluminum cleaner for welding procedures exist rather than a quick wipe with a rag.

Undercut: Speed and Angle Betray You

Undercut is the groove melted into the base metal beside the bead that the filler never filled. Published guidance points to four causes: welding parameters that are too high, inadequate filler addition, an incorrect work angle, and travel speed that is too fast. In pattern terms, the classic beginner version comes from dragging the gun along too quickly while the arc eats into the joint edge, or running a weave without pausing at the toes. Slow down slightly, square up your work angle, and let the puddle wash out to the edge before you move on.

Cold Lap and Lack of Fusion

Cold lap is molten metal frozen on top of base metal it never wetted. The usual pattern causes are a puddle that never reaches the toe, heat that is too low for the setting, or a weave carried so wide that the arc spends its time on cold metal in the middle of the joint instead of tying into the sides. Narrow the weave, keep the arc buried in the puddle, and confirm your settings can actually melt the joint corners before you add motion.

Worm Tracking, Spatter, and Ropey Beads

Irregular ripples, sometimes called worm tracking, come from jerky hand motion or travel speed that speeds up and slows down mid-pass. Excessive spatter usually traces to wrong polarity, poor stickout, or an arc length that is too long because the gun hand drifted away from the work. Convex, ropey beads point the opposite direction: travel too fast for the settings, or voltage and wire feed too low to let the puddle flatten and wet out. Move your whole body across long welds instead of pivoting your wrist, and the ripple spacing evens itself out.

Symptom	Likely pattern cause	Fix
Surface pinholes, pitted bead	Wandering arc, varying stickout, contaminated joint	Brace the gun, hold 3/8–1/2 in. CTWD, clean thoroughly
Undercut at the toes	Travel too fast, wrong work angle, weave without toe dwell	Slow down, correct angle, pause at each side
Cold lap, no tie-in	Weave too wide, heat too low, puddle misses the toe	Narrow the pass, raise settings, watch the puddle edge
Uneven ripples, wandering line	Jerky hand or arm motion, changing speed	Move as one unit, set a steady cadence
Heavy spatter	Long arc, bad stickout, wrong polarity	Check DCEP, shorten stickout, drop arc length
High, ropey bead	Travel too fast or settings too cold	Slow to match puddle width, bump settings up

For a fuller walk-through of these discontinuities, the MTU welding discontinuities webinar is a solid reference, and Earlbeck’s discontinuities overview explains why a visual flaw is not automatically a rejectable defect.

Practice Drills, Safety, and How MIG Patterns Compare to TIG and Stick

Practice is what turns a pattern from an idea into a habit, which makes what you practice nearly as important as how often. Beads run at random on scrap teach your hand random habits just as fast as good ones. This four-week plan turns a spool of wire and a stack of plate into deliberate progress, and it ends with something you can actually use.

A Four-Week Practice Plan

Every session starts the same: clean plate, machine checked, gas flowing, a throwaway strike to confirm the arc. Then follow the week’s focus and stop while your hands are still fresh.

Week	Focus	Drill	What “good” looks like
1	Stringer beads	Chalk lines 6 inches apart on 1/8-inch plate; one bead per line, no stopping	Uniform width end to end, even ripples
2	Weave control	Zigzag, crescent, and looping-circle weaves between chalk lines	Toes tied in, no undercut
3	Groove and fillet coupons	Single-V butt joints and 1/4-inch T-joint fillets	Fill sits flush, both toes wet in
4	Positions and a project	Flat, horizontal, vertical-up, and overhead beads, then a small stool or bracket	Beads hold shape, assembly squares up

Week four matters more than it sounds. A small stool or bracket forces short segments, restarts, and heat management across an assembly, which is exactly where pattern discipline shows up or falls apart. Position drills pair naturally with the All Position Welding Rod Guide. And if flat plate gets repetitive, aluminum rewards the same stringer-first thinking while punishing sloppy speed, as Aluminum MIG Welding: The Complete Practical Guide explains.

How to Judge a Bead Honestly

Grading your own work is a skill in itself. Run every bead against five checks while the plate cools:

• Width consistency. Measure at both ends and the middle; noticeable variation means travel speed wandered.
• Ripple spacing. Even ripples read like a metronome; irregular spacing means the hand hesitated or the body shifted mid-run.
• Tie-in at the toes. A sharp crease where bead meets plate means the puddle never wetted out.
• Undercut. Hold a light at a shallow angle along the edge; a dark groove line at the toe is undercut, not a shadow.
• Cross-section. Cut a coupon, file the face flat, and etch it if you can. Root penetration stops being a guess.

Safety Habits That Belong in Every Practice Session

Where mechanical ventilation is required, OSHA 1910.252 specifies a minimum of 2,000 cubic feet of air per minute per welder unless equally effective local exhaust is used. In a home shop that means open doors, a fan, or a real fume extractor, not optimism. The same OSHA welding, cutting, and brazing standards require work in areas free and clear of combustible materials or protected by fire watchers and guards, so move the cardboard, sweep the sawdust, and keep a rated extinguisher handy. Fume exposure also accumulates across a career; NIOSH’s welding hazard guidance is worth reading before your first long session.

PPE stays simple: an auto-darkening helmet with an adjustable shade, flame-resistant clothing, and proper welding gloves. No synthetics, no rolled sleeves, closed leather boots. Chain or strap cylinders upright with caps on while moving them, and give the ground clamp a clean bite on the work. Electrical safety is mostly housekeeping: dry flooring, undamaged leads, and no testing the gun tip against plate unless you want a face full of spatter.

Why the Same Advice Sounds Different in TIG and Stick

TIG welding relies on a separate filler rod added with a dab or step motion, so its rhythm runs far slower than MIG’s continuous wire feed. Your weave shapes transfer: zigzags, crescents, and figure-eights all exist in GTAW too. The timing does not, because each side-to-side step now waits on the other hand feeding a single drop of rod. Aerospace TIG Welding: Standards, Techniques, and Training shows how far that slow discipline is pushed.

Stick flips the variable. The electrode is consumed as you weld, so the arc shortens every second unless your hand chases the stickout, and SMAW defaults to a drag. The rhythm is a relationship with a burning rod, not a steady contact-tip-to-work distance while a feeder does the work. That is why forum advice conflicts: similar-looking beads can need genuinely different hands. The Advantages of Stick Welding: Why SMAW Still Wins covers where that rhythm still earns its place.

Master beginner MIG welding patterns on wire feed and you have learned the grammar of arc movement; every other process just changes the vocabulary. Keep the schedule, inspect honestly, respect the safety basics, and consistent beads stop being luck.

Conclusion: A Quick-Reference Pattern Guide for Beginner MIG Welders

You have now walked through the full arc of beginner MIG welding patterns: what a pattern actually is, how stringer beads differ from weaves, why machine setup comes before hand movement, how to run your first straight bead, how the common weaves work, how gun angle and travel speed shape every pass, how pattern choices change with joint type and position, what goes wrong when the motion is off, and how to practice all of it on purpose. If you remember only one thread from the whole guide, make it this: set the machine correctly, choose a stringer by default, add a weave only when the joint geometry demands width, hold your angles and travel speed steady, dwell at the toes, and let the puddle lead your eye instead of the arc.

That single sentence is the practical shape of good beginner MIG welding patterns. Everything else in this article is detail hanging off that frame. The pattern is not a signature or a style choice you pick to look experienced. It is a tool you select for a job, and the job is defined by three things: the geometry of the joint, the welding position you are stuck in, and the thickness of the metal in front of you. Aesthetics are what is left over after those three are handled correctly.

Quick-Reference Pattern Selection Table

Joint type / position	Recommended pattern	Key tip
Flat butt joint on plate	Stringer beads; weave only on cover passes	Stack multiple stringers rather than running one wide, slow weave
Outside corner joint, thin sheet	Stringer with careful speed control	Keep travel moving to avoid burn-through
Lap joint	Stringer with a slight drag angle	Watch the top edge tie-in, not the puddle center
T-joint / fillet	Stringer root, then stacked stringers or a short weave	Hold roughly a 45° work angle, splitting both plates
Horizontal position	Stringers with a slight stepped-up motion	Small steps fight gravity sag
Vertical-up	Crescent or J-weave; short stitch for thin steel	Pause briefly at each side to fill and burn in
Vertical-down	Short stringers or stitch motion	Fast and shallow; mostly cosmetic on thin gauge
Overhead	Small stringers, quick travel	Low heat and tight motion prevent the puddle from dripping

The Four Principles Worth Keeping

• Consistency beats complexity. Bead width held uniform across an entire weld is a far stronger beginner goal than replicating a decorative “stack of dimes” look on a three-inch test coupon. Anyone can make one pretty inch; a welder who makes forty identical inches is the one getting hired.
• Settings and pattern must be balanced. Voltage and wire feed speed decide how the puddle behaves, and the pattern only manages what the arc already gives you. Too hot, and a weave washes out the toes. Too cold, and stringers pile up with cold lap. Dial the machine in first, then move your hand.
• Pattern choice follows the joint, not the ego. Geometry, position and thickness decide the pattern. If you cannot justify a weave by pointing at a wide joint gap or a required leg size, run a stringer.
• Evaluate objectively and re-weld what fails. Judge every bead by the same four checks: uniform width, a smooth tie-in at both toes, no visible undercut, and no surface porosity. If a pass fails any of them, grind it out and run it again. Cosmetic cover passes never fix fusion problems underneath.

Patterns are learned in repetitions, not in reading, so the next move is metal. Mark chalk lines, run stringers the full length without stopping, add arcs and circles, then take the same motion into grooves, fillets and out-of-position coupons. When you are ready to push into new territory, our Aluminum MIG Welding: The Complete Practical Guide shows how these same motions translate to a trickier material, and proper cleaning first is covered in Aluminum Cleaner for Welding: How to Prep Aluminum Right. If you want to see how position advice differs once consumables change, the All Position Welding Rod Guide and Advantages of Stick Welding: Why SMAW Still Wins are good next reads.

For machine-side tuning as you practice, Miller Welds’ beginner MIG tips line up well with the sound-and-puddle checks described earlier in this guide. Keep the gun steady, keep the puddle honest, and the beads will follow. The hand pattern you build now is the hand pattern you will use for the rest of your welding life, so spend the reps wisely.

Frequently Asked Questions

What is a MIG welding pattern?

A MIG welding pattern is the deliberate path your hand traces with the gun as you move along the joint — typically a straight stringer bead or a weave such as zigzag, crescent, circles, or figure-eight. The pattern controls bead width, heat distribution, and how the weld ties into the base metal.

Should a beginner use a stringer bead or a weave with MIG?

Beginners should start with straight stringer beads, because they concentrate heat, penetrate deeper, and are easier to keep consistent. Add a weave only when the joint is wide enough that a single stringer cannot cover it properly.

How wide should a MIG weave be?

A common rule is to keep the weave no wider than roughly two to two-and-a-half times the wire or electrode diameter, and always dwell briefly at each toe so the weld metal wets into the edges. Wider weaves increase heat input and the risk of undercut.

Why does my MIG bead wander off the joint line?

Wandering usually comes from an unstable gun position or arc, a dirty joint, inconsistent contact tip-to-work distance, or too much cable tension pulling your hand. Brace your wrist or forearm, keep stickout near 3/8–1/2 inch, clean the joint, and move your whole body rather than just your wrist on long welds.

Should I push or pull when running MIG beads?

Both work; pushing generally gives better visibility and a flatter, slightly wider bead with less penetration, while dragging increases penetration and helps shield the puddle on dirtier or out-of-position joints. Most structural and vertical work is done with a drag technique.

Why is my weaved weld getting undercut at the edges?

Undercut at the toes usually means you are moving across the edge too fast, using too much voltage, or holding a poor work angle. Slow down, dwell momentarily at each side of the weave, reduce voltage slightly, or switch to narrower stringers.

What pattern is best for vertical-up MIG welding?

Vertical-up on steel is typically run with a crescent, J, or small zigzag weave, pausing at the sides to build the shelf and keep the puddle from sagging. Keep the weave narrow and the arc pointed into the root for penetration.

Can a pretty MIG weld still be weak?

Yes — appearance alone does not prove fusion. A wide, slow weave can look smooth while lacking penetration at the root or having cold lap at the toes. Acceptance depends on the applicable code and, when critical, destructive or NDT examination.

How long does it take to get consistent with MIG patterns?

Most beginners see noticeably straighter, more uniform beads within a few focused practice sessions of running repeated beads on plate, and consistency across joint types usually takes several weeks of regular practice. Deliberate practice with self-inspection matters more than total hours.