My Laser Engraver came with a less than stellar 2D controller board that didn’t want to play nicely with Lightburn, so I replaced it with a 3D GRBL controller board that I was familiar with and did NOT hook any stepper up for the Z axis. If anyone else does this, you can solve the HOMING problem by simply connecting a pushbutton switch to the Z Limit input, and pressing it 2x about 0.5 seconds apart, after you hit the HOME icon. Otherwise, it will wait for Z to move and create an error and never home X or Y.
Have you tried this? I cannot think of a reason why it would not work. You are aware Zaxis homing hits that limit switch twice, and that is why the double-click?
This information is nice, but we don’t know what controller you put in it.
Some of these allow you to disable the Z axes home function from the SD card.
Sainsmart control board with GRBL 1.1f
Yes, I tried it and I rely on it. And yes, you’re exactly right - all my axes home twice, but since Z homes first, it may appear like NOTHING happens at all when that “fails”, when in fact it’s just waiting for the 2 momentary switch closures before proceeding to the other two axes.
Hunt down a firmware version that isn’t for a cnc with a Z axes.
In the grbl I used, I removed that operation and recompiled it… it wasn’t rocket science, well documented just comment out the macro…
I would hope to think you could find one without the Z axes enabled.
Somebody with the same problem gimmicked up a small stepper motor with a cam actuating a microswitch. When the controller homes the Z axis, the gimmick simulates a Z axis well enough to make the controller happy.
Might look odd, but gets the job done without having to reflash the controller firmware.
Didn’t take me long at all to find the offending macro and comment it out… It compiled and linked with no issues…
I’ve seen the motor contraption… Seems to me they’d just have a 2d firmware available…
Depends on the comfort level and experience of the user. If something does not follow the stated steps, the user is at a loss if they do not know why it failed. Experience is a valuable part of the recompile/flash game.
Even pushing the button manually for homing must be within someones comfort zone…
It’s a suggestions, which we make all the time that requires the user to decide if they can do it or call someone else…
Just another way to do things.
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