X-axis doesn’t back up from limit switch when homing

just listened to that vidoe again
the X makes a bang when it hits the switch while Y does some expected decelerate/accelerate noises.

it is coming up against a hard stop, ie the switch running out of room to move?

I would halve the $110 and $120 values, and maybe also the home seek feedrates ($24/$25), X must make the same noises as Y.

 

If the Troubleshooting tab reflects the switch status correctly the BlackBox is fine.

Did you check the Grub screws and other stuff mentioned in this thread yet - there are still several unanswered points

If you have doubts about the switch itself, swop around X and Z switches see if problem followed that particular switch (though a broken switch toggled manually will show stuck in the Troubleshooting tab)

Pop us a video of the Troubleshooting screen while you press each switch in turn and release each in turn - also showing the switch press please

 

Please check this closer - videoing the X axis switch on approach and around the time it has to back off - earlier video showed Y axis and quick flash of the screen, not the X axis in detail

Have you tried lowering speeds?

Have you confirmed this?

vs

Just please confirm these were seperate tests. One to test for crossed over wiring, the other to test the switch itself

That switch took a hard knock at some point - roller all bent backwards so I want you to take the known good switch from Z, take it off the machine, bring it over to X, totally swopping this switch with the Z switch

 

OK awaiting the close up videos of the X axis during homing then

 

What is the noise there?

 

For the other video, yes, your wiring is 100% correct, switch positions are correct, BlackBox is working perfectly.

Have you ran any test cuts, like the Hello World? docs:blackbox:hello-world [OpenBuilds Documentation] - to see if the motion side of things (switches are good, so back to the assumption something is going wrong when it tries to move) gets a test - any skipping or other similar issues will show up in a test cut

 

The Y axis motors sounds good, but the X axis does not - probably not a coincidence that its the same axis with the homing issue
Same noise when you jog X?

 

Check in with the vendor on that noise - they might know what typically requires adjustment or a closer check on their machines for that noise

Two more tests for the homing issue: Do run the Hello World, I want to check for some specific clues - even if its just to confirm what we already know (like the limits video, I'll keep wondering until I see it pass that hurdle - as this is a somewhat weird and out of the ordinary case)

In your Grbl settings, dial acceleration back down to 10mm/sec^2 (The Grbl default from Grbl v1.1 Configuration · gnea/grbl Wiki ) and do another homing test please

 

The terminals on the DIN rail here: Running mains in them? AC cabling near the low voltage signal cabling may still induce EMI


I watched the videos
- Was hoping to see a completed hello world cut as in in a piece of a wood - so we can look for telltale signs in the actual cut job result - subtle clues like backlash, leadnut issues, thrust bearing issues, motor stalls, etc all leave clear clues in a final cut that could help us look for issues
- The 10mm/sec^2 - not while running a job, wanted to see if slower acceleration helps it "pull off" at the end of a homing cycle - but sounds like you say you did try that too and it didn't. Same error right?

 

still this....... X did not decelerate at the switch, THAT is a problem that must be addressed.

 

You have bundled the limit switch wires with the stepper motor wires. That is mixing low voltage (sense) wires with high current power wires, a recipe for EMI.

 

yes, maybe, probable (-:

'as much as possible' rather than 'a bit'

wire spacing is subject to inverse square laws, double the distance gives 1/4 the field strength, so every bit counts.
if they can also be 'not parallel' then that is much better.

 

You can edit the tool parameters in OpenBuildsCAM to adjust the endmill diameter

 

OK, any other job with similar details will do, if you can do a pocket and a cut - should give us some clues