XXL Z-Axis homing sounds like grinding

Assembly questions and answers for the Shapeoko 3 CNC Mill
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Joined: Thu Apr 18, 2019 1:49 am

XXL Z-Axis homing sounds like grinding

Post by Spazed » Thu Apr 18, 2019 2:07 pm


Recently purchased and assembled an XXL. When I try to do the initial homing through Carbide Motion I get what you see in the video.

The limit switches are all springy and all 3 turn on their respective LED when pressed. If I manually raise the spindle so that it is pressing the limit switch before I turn the machine on when I run the homing operation the spindle is lowered/drops down a few inches but does so without the grinding noise.

The grinding noise isn't actually grinding on the belt as far as I can tell, just the stepper motor going back and forth really quickly a few degrees.

Any ideas on what's wrong?

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Joined: Mon Sep 30, 2019 4:29 pm

Re: XXL Z-Axis homing sounds like grinding

Post by Purdyc » Tue Oct 01, 2019 5:06 pm

I’m having the same problem, did you ever get it fixed?

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Location: Pennsylvania --- south of the Turnpike, East of US-15

Re: XXL Z-Axis homing sounds like grinding

Post by WillAdams » Tue Oct 15, 2019 9:31 am

Per https://wiki.shapeoko.com/index.php/FAQ#Homing_switches

Make sure you've sent the machine configuration: https://docs.carbide3d.com/support/carb ... -motion-v4
There is a basic page on troubleshooting the homing switches at: https://docs.carbide3d.com/software-faq ... eshooting/ ​ There is also a Carbide 3D Answer video: https://www.youtube.com/watch?v=P7lOLMA ... e=youtu.be
​Please check that the switches are plugged in correctly, and work properly --- when the machine powers up the homing indicator lights should flicker on/off, then once the controller is booted up you can test the switches by pressing them --- the matching light should light while the switch is pressed (closed), and should go off when the switch is released (open). ​
​Please make sure that the machine can mechanically close the appropriate homing switch on an axis before reaching the limit of travel along that axis --- if it can't, it should be possible to adjust a problematic switch's placement by loosening the hardware in question, pulling it into a better alignment and then tightening it. The machine being out of square can also affect this, squaring up the machine, or more expediently, securing a small block or plate for the homing switches to contact may be necessary.
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

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