6201
General Mach Discussion / Re: lathe threading pitch error
« on: January 21, 2013, 09:55:34 AM »
The only two things I can see it being is reported RPM is different from true RPM, but how that could be I am not sure as a single pulse per rev should be just that.
The other thing is it could be the way the servo is handling the electronic gearing. I have seen a few drives with that problem, usually the lower end ones but Tecos are a step up from them even if not what you would say top end.
I am not sure how hard it is to change the gearing in your drives, its a simple matter in the Allen Bradleys, so if its easy enough (must be easier than getting another opto ) I would certainly give it a go at 1:1 to see if your result stays the same or changes.
Also have you disabled the Turn Diagnostics?
Hood
The other thing is it could be the way the servo is handling the electronic gearing. I have seen a few drives with that problem, usually the lower end ones but Tecos are a step up from them even if not what you would say top end.
I am not sure how hard it is to change the gearing in your drives, its a simple matter in the Allen Bradleys, so if its easy enough (must be easier than getting another opto ) I would certainly give it a go at 1:1 to see if your result stays the same or changes.
Also have you disabled the Turn Diagnostics?
Hood