Hi,
Just wondering if someone can tell me if there's any point in trying to repair a stepper motor for a color wheel in my Martin RoboColor (original version) that appears to be failing. It's a KH42HM2-017 which I believe has been used in some other Martin products as well.
The problem is that it is no longer moving over the entire range, it will only move so far. I've tried to 'excercise' it a bit with a chase going from 0-255 and back but no change so far. It doesn't seem to be stuck or anything, it just won't move outside that limited range but instead 'bounces back' to the beginning of that range. I can fairly easily move it outside that range by hand, even with the power on, and it will then stay pretty much in that new range.
I have no idea what its innards look like so I don't know what that says about the type of failure or if it is even caused by the stepper motor itself. Would opening and cleaning it possibly do any good?
I may have found a source for a second hand specimen for just 5 Euro so if I can still get that I'm not going to muck around with this one too much, unless cleaning it is likely to help.
I'm an EE btw but my practical experience with stepper motors is virtually non-existent.
Thanks in advance for any suggestions.