I have schematic of a treadmill controller that was based around the motorola IC in the PDF in post #4 of this link.
Triac Circuit design suggestions
The TM controller uses a simple (~10 pulse/rev) magnetic PU for rpm control with triac control.
I will see if I can dig the TM schematic out, I am using one on a Band saw motor conversion.
Also see this link http://www.littelfuse.com/data/en/Ap...tes/AN1003.pdf