Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: jglohr on June 09, 2014, 08:46:13 AM

Title: Repetitive accuracy shift
Post by: jglohr on June 09, 2014, 08:46:13 AM

Hi,

I have my mill set up with steppers and everything seems to be moving smoothly with no steps missed. When I calibrate the steps per unit, and run four test runs in a row, in the same direction, after every two runs it changes .005" (example: .100, .100, .105, .105, .110, .110 etc). It is very repetitive in this pattern and is present in all three axes. Any thoughts?

Title: Re: Repetitive accuracy shift
Post by: Hood on June 09, 2014, 01:35:15 PM

Please attach your xml.
Are the readings you mention true readings or Machs DRO readings?
Hood

Title: Re: Repetitive accuracy shift
Post by: jglohr on June 09, 2014, 10:00:53 PM

Hi Hood,

It is the actual measurement, with a dial indicator. It is just very strange how repetitive the error is, yet only ever other test run. Thanks

Title: Re: Repetitive accuracy shift
Post by: Hood on June 10, 2014, 03:34:32 AM

Please attach your xml and I will see if I can find an issue in it.
Hood