Advanced Z-axis Offset

Hey Sublime,

When you have a free moment, could you please go over the advanced technique for adjusting the Z-axis offset that you told me about, step by step?

For the rest of you, this approach involves the use of custom start G-code instead of slicing with a baked-in z-axis offset. It has the benefit of letting you go back in and tweak the Z-offset for a file that you've already sliced and tested okay, without having to re-slice the file. That would be really handy right now, as I just swapped out my z-axis platform bolts and nuts, had to re-calibrate, and now it doesn't print at the same offset. Unfortunately, I can't recall the syntax as you described it to me.

Cheers,
Yonder

Ok the first thing you should do is go into your firmware and re-enable the software endstops because they will no longer be needed as we will not be setting and negative numbers.

When the nozzle is to far from the bed we will add the following to the Start gcode just after the last line that says G1 Z0

G92 Z0.3 ;set current height
G1 Z0 ;move to 0


When the nozzle is to close to the bed we will add the following to the Start gcode just after the last line that says G1 Z0

G1 Z0.3 ;move to 0.3
G92 Z0 ;set current height

In both cases you will replace the Z0.3 with the height you are off by.

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