scouringpad
Member
OP
Ensure again that the signaling type from the encoder is quadrature and that it is set up that way in the 1500. Secondly review the filter settings for the inputs. It is possible that the sudden movement is generating pulses faster than the filter setting will allow. You should be able to get correct readings even with very high pulse rates.
The filter setting for that channel is 25 uS. I believe I needed to adjust that when starting this press line a couple years ago as HSC was not getting all the counts on the default setting.