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General Mach Discussion / Re: Table crashed now motor runs full speed. What to troubleshoot next?
« on: June 29, 2016, 12:21:36 PM »Unfortunately Galil systems aren't that common, and from the quick scan of the old product info page, it could be set up a few different ways.
You need to break things down into sections that you can troubleshoot.
I'd be looking at the following areas.
Encoders.
Are they working?
Do you have a scope so you can check they are producing the correct signal?
Is that signal getting back to where it needs to (i.e. the Drive or Controller)?
Drives.
How are they controlled? Step/dir or 0-10V?
If analogue, a quick check is to get a low voltage source (1.5V battery is ideal for a basic test) with a 1k resistor connected in series, and with the drive analogue input wires disconnected and the driver powered/enabled, connect the battery/resistor across the analogue input terminals. The motor should spin reasonably slowly. Then try connecting the battery/resistor the opposite way, and make sure the motor turns at a similar speed in the opposite direction.
I narrowed it down to the encoders on the one axis. I pulled them both apart one by one and scoped the outputs. The axis gives absolutely nothing back when turning it, and I double checked the cable by swapping the motor plugs and verified I got the good axis encoder feedback.
Thanks for the help. I got the other axis going. I think there were a couple problems going on -- somehow in the reinstall the settings got switched back to steppert for the one servo so it just wouldn't stop. I changed it back to servo and the good axis is going again, but the other axis is still dead so I need to figure out how to replace that encoder.
Thanks again!