Techniques for measureing shaft speed
Techniques for measureing shaft speed
(OP)
We have been given a project request, with more restrictions than goals, and need to find a way of measuring shaft speed or position. A 5v digital pulse needs to occur at each 1/3rd degree of rotation. There is no physical reference that an encoder can be mounted to, but an optical reference can be used. So my question is what are the various methods we could use to either measure shaft speed or shaft position. Thanks for the help mates.





RE: Techniques for measureing shaft speed
while spinning ? What is the spin range ? Position error ?
<nbucska@pcperipherals.com>
RE: Techniques for measureing shaft speed
RE: Techniques for measureing shaft speed
http://www.reliabilitydirect.com/appnotes/eccentricity.html
Any of these tach sensors can accomodate your speed readings:
http://www.reliabilitydirect.com/selfpoweredsensorproducts/selfpoweredsensors.htm
Cheers,
Dave G.
RE: Techniques for measureing shaft speed
That really helped.
RE: Techniques for measureing shaft speed
sensor preferrably an optical tachometer with e.g. 1000
lines/rev. Use a phase lock loop to filter it out.
If the inertia is large relative to the forces -- i.e. the
acceleration is minuscule -- you may get by with less
samples per rev.
<nbucska@pcperipherals.com>