I expect I still need to replace hardware because even with a good usb connection and controls working through cncjs I have the strangest problem: As soon as a move on the third axis, one of the Y access motors will go into a weird vibration mode, like it’s trying to hold still against an external force. It seems it will continue to move correctly despite the horrible noise and oscillation (but of course I don’t trust it for an actual job, I was just doing setup and running through some tests).
In case that wasn’t clear, it doesn’t matter the order of movements. I can move X and Y all day long and everything is fine. As soon as a move Z, it goes crazy. Nothing I do aside from a reset will get it to “release”. After the reset, I might move Z and Y, and can continue as long as I want, but as soon as I move X…insanity. Reset→move Z, X, then Y kicks it off.
I did reload the firmware, just in case, and reset all the connectors, but that made no change.
I’ve accepted that I will be replacing the controller, but this is just such an odd problem that doesn’t seem like hardware, since it is inconsistent, so just wondering if anyone has ever seen a similar issue.
Also wondering what I can do to isolate/prevent feedback power surges when manually moving the CNC head, since I suspect that could have caused some of the damage originally, but that’s just a guess. e.g. Would diodes in the motor lines be helpful?
True! SKR and other Marlin boards with LCD displays show this sign under motion. Jackpots generall don’t have LCDs or pendants that show it.
My advice is to move the machine around slowly if by hand. Almost frustratingly slowly. If you move it at the speed it moves in use, you’re already moving it fast enough to damage the controller when it is off.
I wouldn’t be certain that it’s necessarily a controller hardware issue. While it’s certainly a possible culprit, a failing or borderline adequate power supply could also cause something like this, particularly given your symptom of only seeing an issue when using more than any two of the axis.
Just don’t do it. When you’re done with the machine, jog it to a park position that’s not going to be in your way. When you go to use the machine, jog it to where you need it.
There was a guy on here that didn’t understand why we were all “jogging so much”. This is why.
You can configure a macro to move to a defined park position, too.
omg @dos You deserve a reward! Swapped out the power supply and everything is working great. The knob issue may be gone too. It was always slightly intermittent, but it hasn’t yet happened again since I switched and I definitely would have expected it by now. TY TY TY TY!
its kind of reversed if you jog it keeps the loss down.