Jackpot / GRBL - Program Start Issue - LR3 won't stop rising after touching probe

First of all, major thank you to all the contributors around here. Would never have gotten half this far without you and I’m still in total awe of the machine that’s setting in my garage right now.

After your guys’ help on switching the DC power wires, my LR3 is now running great. Was extremely (and pleasantly) surprised to find that everything is perfectly square. The crown test went wonderfully and I’ve been studying Estlcam to create my strut file. I decided to do an air test on the file before cutting to make sure it was going to run the way I programed it. Unfortunately, after touching the probe, the x-axis wouldn’t stop raising up. It pinned itself against the kill switches (which do work when homing) and started grinding until I killed the program.

The start code I used for Program Start in Estlcam is copy and pasted from the guide:

G21
G90
G94
G92 X0 Y0
M0 (MSG Attach probe)
G38.2 Z-110 F200 P0.5 (probe down set thickness )
G1 Z10 F900
M0 (MSG Remove probe)
M62 P1 (If used start spindle pin27 )

Any idea on what’s going wrong?

Can you take the actual gcode file you ran, zip it, and attach it here?

lr3-strut-plate-variable_1081.zip (8.0 KB)

Sure thing!

So it is not the z-110?

The Z-110 should just mean that it will go down a max of 110mm before it errors out if it hasn’t triggered the probe yet.

I don’t see anything apparent in the gcode itself.

What about the config?

Is it 100% exact as Ryan’s config? Is it possible the mpos_mm is set incorrectly, which could be causing it to go up very far when it executes G1 Z10 F900? Maybe scratch that…I’m not sure that setting affects probing, just homing.

You can download and paste your config file here if you want to have it checked.

I’m assuming that

means that it

  • Showed you an “Attach Probe” message in the console
  • You attached the probe
  • Hit resume
  • The router moved down towards the workpiece/probe and stopped when the bit hit the probe
  • Then moved all the way back up into the endstops

Is that correct? Or is it moving straight up when you hit resume after “Attach Probe”, without ever heading towards the workpiece?

Not sure that it should matter, but did you home the machine before running the file?

After the probe is contacted, the router just goes all the way up without stopping. We don’t even get the opportunity to hit resume. I did look at the file in notepad and noticed my first number is G20 instead of G21. Not sure why it saved that way, but could that be causing the issue?

Yep, you’re right…

I kinda skipped over that.

So

G1 Z10 F900

Is telling it to go North 10 inches

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I would verify again that EstlCAM is set correctly, then output the file again and make sure the start GCode looks right

oh wait… Those first 3 lines are added there, probably from your settings in EstlCAM, not the start GCode.

Make sure your length unit is millimeters in the settings

EstlCAM 12:

EstlCAM 11:

Thank you! I’ll go back over everything and make sure it’s all correct before saving again.

That was it! I had changed the Feedrate units but I forgot to switch over the length units.

Thank you for your help!!!

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