Shapeoko stop during cut

CNC Machines Shapeoko
1

Hello,

I have been using the shapeoko 3 for 2 years without any major problem, thank you carbide. Lately it has been having some strange problems, twice in a row during a cut (pocket cut) the Z started to dig indefinitely slowly for a little over 10 cm properly. But for this post I would like to focus on a problem that makes it stop cutting randomly. So during its process it suddenly stops and I lose control, so I have to disconnect from the serial and reconnect it to resume cutting from the beginning.

I could notice:
-Stepper drivers are not hot
-I changed the USB cable
-No vacuum cleaner can cause EMI
-Connected to a MAC with UGS or Carbide motion same problem.
-Never stops at the same place
-When it gets stuck the three leds on the stepper drive are lit up
-Always in a pocket cut (no strange g-code command)

I don’t know what to do, I’m thinking of changing the stepper driver.
Do you have an idea? Thank you.

2

Usually this is caused by the carbon brushes in the trim router wearing.

If changing them doesn’t address things, let us know at support@carbide3d.com

3

Thanks for your answer carbon brushes was a good lead but the problem still occurs after changing them. Now I have tried:

  • a second computer
  • connected the router to an AC bar with noise filter
  • I unplugged the computer and run it on its batteries

-Can the cut wood dust affect the router and cause noise on the AC line? I will plug in soon to check with the oscilloscope.

I’ll writing to you by email but writing the solution to this problem here might help other people caught with this problem.

Thank you

4

I would be more concerned about wood dust affecting the carbon brushes causing premature wear, and affecting lungs and overall health — please use dust collection, and if that’s not sufficient, a filter mask or respirator.

There is a 10-step plan which support will e-mail — it and more used to be on the Shapeoko wiki which is now off-line. You can see it in the Wayback Machine:

https://web.archive.org/web/20210414050308/https://wiki.shapeoko.com/index.php/Electronics#Grounding

Usually if the obvious things don’t address the disconnects it’s something beyond the machine — heavy load on the same line such as a compressor, once it was a failing transformer and went away when the power company replaced it.

Please be patient w/ support and we’ll do our best to work through this w/ you.

5

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