Uploaded March 2025 | Updated September 2026, 4 hours ago

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Electrics is not my strong suite. Having two machines needing trouble shooting is a bit of a challenge for me.

Here is the LinuxCNC thread.
forum.linuxcnc.org/27-driver-boards/55685-blown-7i84?start=0
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00:00 - Intro
00:13 - Why I didn't learn electrical troubleshooting
04:11 - Jones and Shipman 540 surface grinder spindle contactor
08:41 - MAHO Mill electrical problem
15:59 - Summary