NorthStar RIM Tach
®
1250 Instruction Manual
10 Dynapar (847) 662-2666 17 November 2008
Figure 5: Pulse Wheel Assembly
2.2.3 High Slew Rate Wheels
The following section discuses how to mount a high slew rate wheel (refer to Figure 6).
1.
Loosen the screws around the outer portion of the wheel to approximately .030 inch gap. This will allow the inner
diameter ring enough space to move out of the way of the shaft. Do not to open the gap too far or the ring will move out
of the pocket it sits in.
2.
Place the pulse wheel over the end of the shaft. The pulse wheel will stop at the ring. With a pen (or some other object
that will not damage the shaft ) work the ring around the shaft into the groove in the wheel. The wheel should then
completely slide on the shaft.
3.
Place the housing on the motor using the four 0.625”-11 mounting hex cap screws. Bolt the housing to the motor. Align
the pulse wheel so that it is flush with the alignment surface of the housing.
4.
Finally, tighten down the pulse wheel mounting bolts in a star pattern.
NorthStar recommends that if a brake is going to be used in conjunction with the encoder, the
encoder must use a high slew rate wheel. NorthStar considers <3600 RPM per second
acceleration or deceleration of the shaft to be a high slew rate wheel application.
Figure 6: High Slew Rate Wheel
