Dwyer Mark - Manual (Page 13)

12
MARK 3 DIRECT AND LEVER DRIVE INSTALLATION
SHAFT DRIVE
YOKE DRIVE
CLOCKWISE
CAM SCREWS
1 2
A
B
C
D
E
INSTALLATION PROCEDURE
Mount the switch as necessary, concentric and perpendicular over the rotating shaft that is to be monitored. Direct drive
yokes are available in many widths and lengths to fit your needs (Yokes are fabricated from spring temper stainless
steel. Do not attempt to fabricate your own yokes.) Shaft drive units require an appropriate coupling (flexible type
recommended) to the shaft being monitored.
ADJUSTING PROCEDURE
1. Remove cover by unscrewing. Take care to keep threads clean and free from damage.
2. Clockwise rotation of the yoke or shaft will move the bar up, counterclockwise moves it down.Switches are set at
the factory for approximately one revolution of the yoke or shaft to actuate switch #1. Notice, that the cam screw for
switch #1 is in location E. By changing that cam screw to location D, three additional revolutions of the yoke or shaft
will be required to actuate #1 switch. Moving the cam screw to holes C, B or A will add three revolutions for each
location moved, until 13 revolutions are required between switch #1 and 2 actuation.
3. The cam screw for switch #2 in location A. By moving it to location B, C, D, or E, three revolutions are added for
each location change.
4. Rotate the switch slowly through the full cycle several times before tightening the bolts securely. Observe the
rotation for signs of yoke or shaft misalignment or binding with the actuator shaft. Correct as necessary, then
tighten the mounting bolts and recheck alignment.