Messages

1

General Mach Discussion / Re: Circle problems

« on: January 10, 2012, 11:11:43 AM »

You are correct.  .065 backlash in both directions.  Actually a bad stepper motor.

2

General Mach Discussion / Circle problems

« on: January 09, 2012, 02:17:46 PM »

I have a brand new Legacy CNC.  I am trying to cut a 3" circle, .06 deep with a .125 bit.  I can run the cut as slow a 10ipm and still get the same results.  Has anyone seen something like this?  The machine uses a Smooth Stepper USB interface.  I have tried using arcs and also raster and get the same results.  Some folks say it is backlash.  The manufacturer says its probably not.  One opinion is that the Mach data is getting scrambled.  The movement is so smooth that it looks intentional.  Using the lock down version of Mach and the Smooth Stepper driver/plugin.