Z Offset

Also known as: Z-Offset, Nozzle Offset, First Layer Height Offset

beginner Slicer Settings ⚙️ Slicer Setting

Fine adjustment of the nozzle height relative to the bed for perfect first layers.

Z offset is a fine adjustment that moves the nozzle closer to or further from the bed. It’s used to dial in perfect first layer squish after bed leveling.

Understanding Z Offset

  • Negative values (-0.1) move nozzle CLOSER to bed
  • Positive values (+0.1) move nozzle AWAY from bed
  • Typical range: -0.3mm to +0.3mm

When to Adjust

  • First layer not sticking → Lower Z offset (more negative)
  • First layer too squished → Raise Z offset (more positive)
  • Nozzle scraping bed → Raise Z offset
  • After changing nozzle
  • After changing build plate

Finding the Right Z Offset

The “Paper Test” Starting Point

  1. Home printer
  2. Slide paper under nozzle
  3. Lower Z until paper has slight resistance
  4. This is approximate zero

Fine Tuning

  1. Print a first layer test (large square)
  2. Observe the lines:
    • Gaps between lines → Lower Z offset
    • Lines too flat/transparent → Raise Z offset
    • Good squish, slight overlap → Perfect!
  3. Adjust by 0.02-0.05mm increments

Live Z Adjustment

Many printers allow adjusting Z offset during the first layer. Watch and adjust until it looks right:

  • Lines should slightly overlap
  • No gaps between lines
  • Filament not piling up
  • Smooth, consistent appearance