Hello all!
We recently had a problem pop up with our CNC (Omio x8-2200L USB) where it would not detect the z-axis limit switch’s activation when attempting to home/reference the z-axis while setting up the machine. This leads the machine to keep trying to move up in Z when it homes, leading to oscillation as it hits and goes back to the hard stops.
The last time this happened (in October), the fix was to simply swap out the limit switch with a new one and wire it to the cable the old one had connected to using some WAGOs.
We tried this again last night and it did not work. When we test for contact through the leads of the limit switch while the switch is depressed, it is contact positive, so we don’t think it’s a problem with the limit switch but with the circuitry on the CNC’s gantry that it connects to.
Any ideas on what this problem may be or how to fix it? Thank you!
Check the wiring that runs from the limit switch to the box for continuity—there’s a good chance it got snagged on something and broke.
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Fixed it Tuesday and it was exactly this. An old set of wires running from out of the E-chain and through a hole in our enclosure had some solder joints which failed, replaced them with WAGOs/ferrules instead and the CNC works now.