Rockwell Automation 8520-GUM 9/Series CNC Grinder Operation and Programming Manual Documentation Set - Manual (Page 420)

Axis Motion
Chapter 12
12-48
Example 12.20
CSS while Dressing a Grinding Wheel
Program Comments
G92 S9000; limit spindle speed to 9,000 rpm maximum
G90M58; activate absolute prog. mode, enable CSS
G96 L0 S10000; CSS mode, surface speed of 10,000 m/min
G00 X260. Z165.; rapid move to position wheel near dressing tool
G01 X125. Z80.; feed move along X and Z, wheel speed increases
G00 X260.; rapid move from dresser, wheel speed decreases
G97 S8000.; cancel CSS mode, set wheel speed to 8,000 rpm
Figure 12.24
Results of Example 12.20, CSS while Dressing a Grinding Wheel
500
3 2 1
Grinding
wheel
250
375
--Z
--X
Dressing
tool
12036-I
Grinding Wheel Position Wheel Diameter (mm) Wheel Spindle Speed (rpm)
1 500 6,366
2 375 8,488
3 250 9,000 1
1
The calculated spindle speed would be 12,732 rpm at a wheel diameter of 250mm at position 3.
When the maximum wheel spindle speed limit of 9,000 rpm is reached, it is not exceeded.
Important: To prevent the grinding wheel from exceeding 9,000 RPM, a
limit is placed on the grinding wheel spindle speed (described on page
12-42) with the G92 S9000; block.