I have a workbee CNC with their blackbox controller. I was running their gcode sender off any old laptop which is about on it’s last legs. I installed Gsender on a Raspberry Pi4. Everything seems to connect fine. Ran a cut file which I had previously cut with my last setup. Cut seems okay except for the Z axis. All the depths were too deep. I made a test piece with different depth test pockets and they’re all coming out being cut too deeply. All 4 pockets average out being off by .0985". X and Y seem to be coming out accurate as before, so I feel like maybe there is some setting I’ve gotten set wrong maybe? Anyone have any suggestions on where to look?
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How are you setting Z zero? If you’re using a touch block make sure that it is entered correctly in gSender. If your block is shorter in Z than the entered dimensions in gSender it would cut deep.
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I don’t have a touch block yet, so I’m just dialing it in by hand using paper and then zeroing my Z axis, which should get me much closer than 0.10". That’s a good point. I might have accidentally set it for a probe which I’m obviously not using. I’ll investigate that this evening. Thanks for the lead.
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I would start by checking the firmware to see if $102 Z-axis travel resolution steps/mm is correct, easy way is by running the Movement Tuning Calibration Tool.
If that’s not the problem I would then do a few more groups of test cuts checking to make sure the Z-axis or tool is not dropping during a job.
I had this problem twice, first time was a loose coupler causing the lead screw to start sliding down
and the second time was a loose anti-backlash nut. A loose tool could cause the same problem.
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