NorthStar RIM Tach
®
1250 Instruction Manual
9 Dynapar (847) 662-2666 17 November 2008
Figure 4: Typical 12.5 Inch Diameter Type C-Face Motor
2.2.2 Pulse Wheel Assembly for Small and Large Thru-shaft
To prepare the pulse wheel assembly for installation, perform the following steps. See Figure 5.
Caution must be used when handling the pulse wheel assembly. The surface of the pulse wheel
outer rim is sensitive to scratches and impacts. The magnetic properties of the pulse wheel
material can also be distorted or erased by exposure to strong magnetic fields.
1.
Remove pulse wheel assembly from packaging.
2.
Leave protective red rubber band in place over pulse wheel.
3.
Place assembly over the end of the shaft. The wheel side with the two set screws should be toward the outside, away
from motor.
Be sure the set screws in the adapter are retracted so that they will not interfere with the shaft
while mounting the unit.
4. Slide assembly on the shaft until there is about a 1 inch gap left between inner face of pulse wheel and motor facing. It
may be necessary to lightly tap the assembly to get it all the way on. The 1 inch gap is not a critical measurement.
Tap on the steel hub; not on the silver-colored aluminum magnetic wheel.
5. If you have already drilled set screw locating holes, align unit to holes and tighten set screws to a nominal 15 inch-
pounds. If you will not be using set screw locating holes or wish to use alternate method of adding them, just leave
assembly in place and continue to the
Enclosure Installation
.
