G92 on LR3 seems to move head?

LowRider CNC Troubleshooting
1

Trying to get the start script for a print to run, and I have the following set, to account for one of those 19mm thick z probes:

G90
G92 X0 Y0 ; Set Current position to 0 on the X and Y axes.
G38.2 Z0 ; Probe down to touchplate
G92 Z19 ; Set new Z position to thickness of touchplate
G1 Z4 F900 ; Lift off touchplate
M0 Remove probe ; Pause and wait for touchplate removal

My problem here, is that when it executes the G92 Z19, the gantry is moving down 19mm., not setting the Z axis to 19mm above the workpiece.

This is in the SKR Pro running the touchscreen.

I’ve also noticed that the M0 messages never display the message, all I get is a message box that pops up and says “Paused”, and can hit okay to close the popup box, and then its back to waiting for me to hit resume.

I think this is my last hurdle! Help? :slight_smile:

2

Z4 is below Z19.

Are you sure it’s not the G1 Z4 that’s causing movement downward? Perhaps you need G1 Z23 to move 4 mm above the touchplate.

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3

Damn, yep, that would be it. Was thinking in terms of relative positioning, not absolute. Did a cut and paste from the milling basics section of the V1 site for the starting code, but didn’t think about where each move was going to put the bit.

Thank you!

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4

I have a question about adding gcode to my files. Can I edit the estlcam gcode output to put this in every time I do a job? Right now I am just sending G92 X0 Y0 Z0 to my skr pro using the touchscreen which is kind of cumbersome.

I do have a touchplate (not currently wired up) but this would make my workflow incredibly simple…

5

On the Milling Basics page there is suggest gcode to put in estlcam for each machine and control board for start, end and tool change gcode

6

just got around to doing this. SOO much easier!

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