Layer shift in resin prints: layers sliding sideways

A layer shift is when part of a resin print is built in the wrong spot: everything above a certain height is offset from the layers below, sometimes more than once. Formlabs describes it as layers displaced relative to the build platform or the earlier layers during the print. Unlike a clean split (delamination), the layers usually stay bonded; they're just in the wrong place. The cause is almost always something moving that shouldn't: the build plate, the printer itself, or the Z axis, often pushed by high peel forces.

Most likely causes (in order)

Loose build plate or mount: Formlabs says layer shifting on its Form 4 printers is usually caused by a loose build platform dovetail (the mount the plate locks into). On any printer, a plate or plate knob that can wiggle lets each peel nudge the print sideways.
Vibration or bumping during the print: Anycubic lists table vibration, touching the printer, opening the cover and other vibrating devices on the same table as causes of Z-axis positioning errors and layer misalignment.
High peel forces: Formlabs notes high forces on the build platform from model geometry or layout, especially large layers on one side of the plate, can contribute to shifting. Anycubic adds large flat surfaces parallel to the plate, too few supports, hollow parts without drain holes, and lift settings that are off.
Dirty, dry or worn Z axis: Anycubic lists dust, insufficient lubrication or excessive play in the lead screw; Lychee's layer-lines guide lists a dirty printer causing the rails or screw to catch.
Pausing or adding resin mid-print: Lychee lists pausing the print and adding resin during a print among causes of lines at one height; Anycubic says to wait until the plate has fully stopped before touching anything if you must pause.
A failed print that partly recovered: Formlabs warns a failed print that partially recovers can look like a layer shift, so check the vat for debris and the release film for contamination too.

Settings to change

Setting	Change	Why
Build plate	Tighten the plate and its mount, then try to wiggle it by hand; re-level if you loosened it	Formlabs' first fix for layer shifting is tightening the dovetail and checking the platform for looseness by hand.
Placement	Stable, level surface, anti-slip pads, nothing else vibrating on the table; don't open the cover or touch the printer mid-print	Anycubic's first troubleshooting step is removing external interference.
Orientation and layout	Tilt models about 30–45°, avoid big flat areas parallel to the plate, and spread big cross-sections across the plate instead of one side	Lower peel forces per layer (Anycubic; Formlabs recommends checking for large-area layers on one side in the slicer).
Supports and hollowing	Add support density where needed and drain holes in hollow parts	Anycubic links deformed supports and sealed cavities to model displacement.
Lift height / speed	Anycubic suggests about 5–10 mm lift height and 30–50 mm/min lift speed for its P1 Max; use your resin maker's profile as the starting point	Reduces peel suction and vibration artifacts.
Z-axis lead screw and rails	Power off, wipe off dust and resin with a lint-free cloth, and apply the grease your printer maker recommends (ELEGOO recommends white lithium grease); check for binding or play	Anycubic and ELEGOO both list a dirty or dry lead screw; significant play or binding is a support case.

Exact values depend on your printer and resin. Start from the resin maker's recommended settings and change one thing at a time.

Where to change it in your slicer

Setting names and locations for Lychee, CHITUBOX, Anycubic Photon Workshop and UVtools. Where we could not confirm an exact menu location, we list the setting name only. Names can differ slightly between versions.

Orientation and layout : Tilt models about 30–45°, avoid big flat areas parallel to the plate, and spread big cross-sections across the plate instead of one side

Lychee: Rotate the model (tilt 30 to 45 degrees)

CHITUBOX: Rotate the model (tilt 30 to 45 degrees)

Anycubic Photon Workshop: Rotate the model (tilt 30 to 45 degrees)

UVtools: Not available

Orientation is set in your slicer before slicing.

Supports and hollowing : Add support density where needed and drain holes in hollow parts

Lychee: Hollowing and drain holes

CHITUBOX: Hollow and hole tools

Anycubic Photon Workshop: Hollow and hole (punch) tools

UVtools: Issues: Suction cups / resin traps

UVtools can flag resin traps in a sliced file; add holes in your slicer.

Lift height / speed : Anycubic suggests about 5–10 mm lift height and 30–50 mm/min lift speed for its P1 Max; use your resin maker's profile as the starting point

Lychee: Lift Distance and Lift Speed (Burn-in and Normal layers)

Set in your resin profile.

CHITUBOX: Settings > Print tab > Lifting Distance / Bottom Lift Distance, Lifting Speed

Anycubic Photon Workshop: Slice settings > Print Control > Z Lift Distance, Z Lift Speed

UVtools: Tools > Edit print parameters > Lift height and Lift speed

UVtools edits an already-sliced file, so make the change there after slicing.

Quick checklist

Look at the failed print: offset blocks of layers point to a shift, a clean crack points to delamination
Lock the build plate and mount tight, then check it can't wiggle
Move the printer to a solid, level surface away from other vibrating gear
Don't open the cover, bump the table, pause, or top up resin mid-print
Re-orient at 30–45° and spread large cross-sections across the plate
Add drain holes to hollow parts and more supports where models are heavy
Power off, clean and grease the Z lead screw and rails; feel for binding or play
Clear the vat and check the film before reprinting, then run a small calibration print

FAQ

Why are my resin print layers shifting sideways?

Something moved during the print. The most common culprits are a loose build plate or plate mount, vibration or bumping the printer, and high peel forces from large flat layers. A dirty, dry or worn Z lead screw is next.

Is layer shift the same as layer separation?

No. With a shift, the layers stay bonded but are built offset from the ones below. With separation (delamination) the layers split apart. They can share causes like aggressive peel, so see our layer separation guide too.

Can exposure settings cause layer shift?

Not directly. Exposure mostly affects how well layers bond. Shifts come from movement, though weak supports or very large cross-sections make the print easier to push around during each peel.

Should I grease my resin printer's lead screw?

Yes, as routine maintenance. Power the printer off, wipe off dust and old grease or resin, and apply the grease your printer maker recommends (ELEGOO recommends white lithium grease). If the screw binds or has noticeable play, contact the manufacturer.

Not sure which one you've got?

Upload 1–4 photos of the failed print and PrintCleric ranks the likely causes and tells you exactly which settings to change, with sources.

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Sources

Related fixes

Wear nitrile gloves and eye protection when handling uncured resin, and work in a ventilated space.