rigid tapping fail advice and "discriminant" err

This maybe?

www.usdigital.com/products/encoders/incr...tary/disks/HUBDISK-2

sam

skunkworks wrote:

This maybe?

www.usdigital.com/products/encoders/incr...tary/disks/HUBDISK-2

sam

Yeah, I was looking at those. By the way, how can that wheel do quadrature? I thought there had to be two sets of holes that were spaced 90 degrees out of phase? Or, can you have another optical emitter that is on a non-hole while the first emitter is on a hole?
-Tom

ps: I see that this unit (below) works with that disk to provide quadrature, so obviously one optical emitter/pickup inside the EM1 module is 90 degrees out of phase of the other. How does one do that on a home made one, that is, if I add another optical pickup to my existing wheel how to I ensure they two are 90 degrees out of phase?
www.usdigital.com/products/encoders/incr...ules/EM1#description

Tom, You would need 5 wires; power, ground, A, B and Index.

tome wrote:

skunkworks wrote:

This maybe?

www.usdigital.com/products/encoders/incr...tary/disks/HUBDISK-2

sam

ps: I see that this unit (below) works with that disk to provide quadrature, so obviously one optical emitter/pickup inside the EM1 module is 90 degrees out of phase of the other. How does one do that on a home made one, that is, if I add another optical pickup to my existing wheel how to I ensure they two are 90 degrees out of phase?
www.usdigital.com/products/encoders/incr...ules/EM1#description

Unless you're good you have to make at least one of the pickups adjustable and then set the phase of the signals using a scope.

Drew