RE: [CAD_CAM_EDM_DRO] machine inaccuracies fixed by software compensation

Doug:

Isn't the 5% error rating on the motor the positional accuracy of the last
step, and not cumulative?

-- Carol & Jerry Jankura
Strongsville, Ohio
So many toys, So little time....

| -----Original Message-----
| From: doug [mailto:doug]On Behalf Of Doug Fortune
| Sent: Wednesday, September 05, 2001 12:16 AM
| To: CAD_CAM_EDM_DRO@yahoogroups.com
| Subject: [CAD_CAM_EDM_DRO] machine inaccuracies fixed by software
| compensation
|
| Assuming the ballscrew/acmescrew/threaded rod
| is perfect (its far from perfect), then
| a 5% motor inaccuracy on a 5 TPI thread
| means .05*.200 == 0.010 inch. This is
| not inconsiderable.