I had a X axis crash on my PRO4848 the other day. It wasn’t severe enough to trip the Clearpath motor over torque protection and fault the system but it did cause about a 0.02" of slippage somewhere in the drive train. I had to reset the precision homing point in the Clearpath motor software and now everything seems to be working OK. I am now wondering where the slippage occurred and if I should replace any drive train components. I see that Avid is now offering an upgraded Drive Gear Set that has a replaceable gear cartridge held in place by three screws instead of a press fit. Could have the old press fit version, that I have, slipped in the crash? I am leaning toward just ordering the new Drive Gear Set and installing it to be on the safe side, Does anyone know if possible slippage of the press fit was one of the reasons Avid upgraded the Drive Gear Set?
Check the setscrews on the motor pulley. If they were loose that could have slipped. If that isn’t it, I suppose the pinion gear could have slipped in the big pulley if it is the old styly one.
I guess it might be possible for a slip on the motor shaft but it uses two set screws and has a key.
That’s right, I forgot they had a key too. Not likely the problem then.
Seems like the R/P belt jumped a tooth or two, but I don’t think that would give you the 20 thou error you are seeing.
The timing belt and the gear engagement with the gear rack are two other possibilities but they would yield a much larger error. That is the reason my top suspect is the compression fit joint.