Flashcut CNC Pro Series, Hardware Manual

Page: 32 / 59

FlashCut CNC Section 6 Drive Settings 32
Step Pulse Noise Filtering
Electrical noise can affect the STEP signal in a negative way, causing the
drive to think that one step pulse is two or more pulses. This results in extra
motion and inaccurate motor and load positioning. To combat
this problem the drives include a digital noise filter on the STEP and DIR
inputs. The default factory setting of this filter is 150 kHz, which works well
for most applications.
However as discussed in “Step Size” of this section, if you are operating the
drive module at a high number of steps/revolution and at high motor speeds
you will be commanding the drive at step rates above 150 kHz. In such cases
you should remove the cover and move jumper S4 from the 150 kHz position
(1-3) to the 2 MHz position (1-2) as shown
below.