Hi, Richard,
I ended up using an 600 PPR encoder that has identical specs to John's.? The mechanical speed is not an issue; maximum spindle speed with the gear reduction is 1250 RPM; at a 3:1 gear ratio, that's a maximum encoder mechanical speed of 3750 RPM.? What I was concerned about was the frequency response.? 600 PPR x 3750 RPM / 60 min/sec = 37.5 kHz, whereas this encoder is specified with a maximum frequency of 20 kHz.?
Wouldn¡¯t that be fixable by a larger gear on the encoder, reducing the ratio? Or would it require redoing the mount?
--?
Bruce Johnson
"Wherever you go, there you are." B. Banzai, PhD
