Lodestar CM Hoist, Руководство по эксплуатации

Страница: 21 / 96

17
Figure 17. Limit Switches,
Models J thru RRT-2
1. Limit Switch Sub-Assembly 4. Guide Plate
2. Limit Switch Shaft 5. Screws
3. Traveling Nuts
Figure 17a. Rotatable Limit Switch,
Models J thru RRT-2
SETTING UPPER LIMIT SWITCH
5. Refer to Table 6-The “A” dimensions given are the mini-
mum distances that should be set between top of
hook block and bottom of hoist. In other words, the
highest allowable hook position.
CAUTION: THE “A” DIMENSIONS SHOWN
IN THE TABLE ARE THE MINIMUM
ALLOWED FOR SAFE OPERATION AND
SHOULD NOT BE REDUCED.
6. Reconnect hoist to power supply.
7. Run hook to the desired upper position, cautiously
operating the hoist without a load.
8. Disconnect hoist from power supply.
9. Moving one traveling nut toward the other increasing
hook travel and away from the other decreases the
travel. Now, turn the nut nearest the switch indicated
as the “UPPER LIMIT SWITCH” until it just breaks the
limit switch contacts. An audible click will be heard as
the switch opens. Continue to rotate the nut toward
the switch an additional one full tooth.
10. Reposition the guide plate in the next slot and
securely tighten screws.
11.Reconnect hoist to power supply and check the
stopping point of hook by first lowering the hook about
10 inches, then raise the hook by jogging cautiously
until the upper limit switch stops upward motion. The
stopping point of hook should be the desired upper
position. If not, repeat the above instructions.
12.Double check the setting by lowering the hook about
24 inches (609 mm) and then run the hook into the
upper limit with
(UP) control held depressed.
13. Fine adjustment of the upper limit setting may be
obtained by inverting the guide plate in Step 10. The
offset on the plate gives adjustments equivalent to 1/2
notch, see Table 6 for the Hook Travel Per Notch of
Limit Switch Nut.” When inverting the plate, it may be
necessary to use the notch adjacent to the one used
in the preliminary setting.
1
2
3
4
5