CSFM is Available -- Check this box if Constant Surface Feed Mode mode is available on the machine. If CSFM is not available on the control, the postprocessor can simulate it by segmenting the motion. If specified that the control uses direct RPM, this feature will cause the postprocessor to create a spindle lookup table based on the minimum and maximum spindle values supplied. This will cause speeds to be adjusted to the nearest table value when in RPM mode. (Intcom 2455)