DYNAPAR NorthStar RIM Tach 1250 Gebruiksaanwijzing - Pagina 12

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Drawing Not
To Scale
Magnetic
Ring
Pulse Wheel
Assembly
2.2.5.1 Pulse Wheel Alignment Check
An optional and more accurate pulse wheel alignment check procedure is provided as follows. See Figure 7.
1. Locate four 5/16-inch diameter access holes on recessed area in the face of the enclosure. Access holes are located on a
4.63 diameter Bolt Center (BC).
2. Using a calibrated depth measuring tool (depth gauge, vernier caliper, etc.), measure through access hole to obtain
distance between recessed surface on enclosure and aluminum magnetic ring underneath.
Ensure the gage is measuring the distance to the flat surface of the aluminum magnetic ring and
has not engaged the edge of the steel hub or slipped past the edge of the pulse wheel.
3. Repeat for all four access holes. Take an average of all four readings.
The range (difference between high and low measurements) of readings should be less than
0.005 inch. If the range of the readings is greater, than this, the pulse wheel is not perpendicular
to the shaft and will appear to wobble during shaft rotation. Tap the edge of the pulse wheel to
bring it back in line.
4. The distance between surface of the recess in the face of the enclosure and silver aluminum magnetic ring should be
0.792 ±0.010 inch. Otherwise, the position of the pulse wheel assembly should be adjusted. Refer to Paragraph 2.6 for
information on adjusting axial position of pulse wheel assembly.
Figure 8: Optional Pulse Wheel Alignment Check w/ Depth Gauge
12
NorthStar RIM Tach
Enclosure
Recess
Straight
Edge
Set
Screw
Set Screw Boss
Side View
Figure 7: Pulse Wheel Alignment Check Using Straight Edge
Dynapar (847) 662-2666
®
1250 Instruction Manual
Front View
Drum/Hub
Alignment Hole
Pulse Wheel
Assembly
Shaft
Cover Plate
ThreadedHole
Front View
17 November 2008