Voltage Counts Range 0-970

[Jefferson]

Al,
Thanks for the reply. Hardware was our first thought as well. We checked the voltage output from them and they are send as much as 4.96V to the analog module (couldn't ever get exactly 5, but I expect we weren't hitting the exact roll-over point).

We are using these guys:
http://www.usdigital.com/products/en...tary/shaft/ma3

They are magnetic encoders with 10-bit resolution, so I don't think shorting around the end is the issue.

[Al Skierkiewicz]

Jeff,
Those should be fine but be aware that the rapid move from +V to 0V might occur at too high a slew rate to be used by the analog module without some filtering. That might be what is giving you the noise. You might also want to add a cap right at the power input of the encoder, say a .47 or 1ufd just to keep the power supply clean. Are you using the ball bearing version?