Spindle Speed Variation SSV
Spindle Speed Variation
M38 / M39 Spindle Speed Variation On/Off
Spindle Speed Variation (SSV) allows the operator to specify a range within which the spindle speed continuously varies. This is helpful in suppressing tool chatter, which can lead to an undesirable part finish and/or damage to the cutting tool. The control varies the spindle speed based on Settings Mach parameter 1931 and 1932. For example, in order to vary spindle speed +/- 50 RPM from its current commanded speed with a duty cycle of 3 seconds, set Setting 1931 to 50 and Setting 1932 to 30. Using these settings, the following program varies the spindle speed between 950 and 1050 RPM after the M38 command.
M38 - Turn On SSV (Spindle Speed Variation)
Vary the spindle speed to help with chatter issues while cutting
Parameters
P(optional) RPM to very the speed byE(optional) Time interval that the speed is varied by
M39 - Turn Off SSV (Spindle Speed Variation)
Turn off the spindle speed variation
Spindle Speed Variation is only available on Modbus controlled VFDs at this time