What makes you think it is noise? It sounds like it could be because of tuning. Both analogue connections should be made, the oscillations probabally stop because you have disconnected one of the inputs. I go back to what I said previously and tune and trouble shoot using the Galil terminal program, and when you have good results, then go through the Camsoft interface.
Also you have to phase the encoder rotation correctly, this can be reversed at the ICM2900 by reversing the A & /A phases.
Al
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CNC, Mechatronics Integration and Machine Design.
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E. |