Layer Shifting

Layer shifting occurs when one or more layers of a print are displaced horizontally from the rest, creating a staircase-like misalignment. This results in a structurally weak and visually ruined print.

Common Causes

1. Loose belts — Slack timing belts on X or Y axes allow the print head to skip positions
2. Stepper motor overheating — Overheated drivers or motors lose steps and miss positions
3. Acceleration too high — Aggressive speed changes cause the print head to overshoot
4. Mechanical obstruction — Cables or debris catching on moving parts cause sudden jolts
5. USB connection instability — Communication drops between host and printer interrupt gcode streaming
6. Insufficient stepper driver current — Under-powered drivers cannot maintain position under load

Recommended Fixes

1. Tighten belts so they are taut with a slight twang when plucked
2. Reduce acceleration and jerk values (start with 500 mm/s² acceleration)
3. Check stepper driver current — increase slightly if motors are losing steps
4. Add heatsinks and cooling fans to stepper drivers to prevent thermal shutdown
5. Print from SD card instead of USB to eliminate connection drops
6. Ensure all axis rods and rails move freely without binding
7. Secure cables with clips so they cannot snag on the frame or print head