DYNAPAR NorthStar RIM Tach 1250 Manual de instrucciones - Página 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

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