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Setting the Z Offset

Setting the Z offset

This is something that can need to be tweaked even if you've got bed level sensing, especially if you've not used your printer for a while. This article will assume that you're using Marlin firmware.


Where is it?

Control > Motion > Probe Z-Offset

So the number is..?

The number that you see is in thenths of a mm I think


The lower the number the lower the nozzle: -1.75 will be closer to the bed than -1.71!


How To:

The way that I readjust is to 


A Quick History

To give an indication here are some notes that I drew up one afternoon for reference, the offset that you need might well be different on your printer/setup but the behaviour of the test prints and the changes in measurement to achieve them should be roughly the same. I was also looking at the bed and nozzle temperature as I was having a really bad day to begin with:


  • Bed: 50 Noz:194 Zoff: -1.72
    • Good, not quite, not adhering in all places, needs help
  • Bed: 50 Noz:194 Zoff: -1.75
    • Great adhesion, clicking
  • Bed: 50 Noz:194 Zoff: -1.73
    • no help, nearly there, filled in first layer, not everything stuck, popped from bed
  • Bed: 50 Noz:194 Zoff: -1.74
    • No help, didn't all stick, odd corner issue, freak?
  • Bed: 50 Noz:192 Zoff: -1.74
    • popped from bed









Created by JBaker. Last Modification: Saturday May 11, 2019 16:33:03 BST by JBaker.