I rarely use the M04 or tapping canned cycle so im not sure how long this problem has been around. I got an optical tach to check the actual spindle speed. In forward with a programed speed of 5500 rpm the actual rpm at the spindle is 4700 rpm. In M04 the following are the results from my test. Any ideas on where to start to correct this problem.
Programed Speed in M04 Actual Speed in M04
100 53
200 75
500 398
1000 715
2000 715
3000 715
4000+ Will jump around a little from 700 to 1000 |