CM-ET Lodestar - Manual (Page 17)

Figure 19B. Rotatable Limit Switches, Models J, L, R, LL
& RR
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. REFER TO TABLE 6.
6. Reconnect hoist to power supply.
7. Run hook to the desired upper position, cautiously operat-
ing the hoist without a load.
8. Disconnect hoist from power supply.
9. Moving one traveling nut toward the other increases 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 61 cm
(2 Foot), 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 setting by lowering the hook about 61cm
(2 feet) 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.
SETTING LOWER LIMIT SWITCH
5. Refer to Table 6 - The “B” 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 “B” DIMENSIONS SHOWN IN THE TABLE
ARE THE MINIMUM ALLOWED FOR SAFE OPERATION
AND SHOULD NOT BE REDUCED. REFER TO TABLE 6.
6. Reconnect hoist to power supply.
7. Run hook to the desired lower position, cautiously operat-
ing the hoist without a load.
8. Disconnect hoist from power supply.
9. Moving one traveling nut toward the other increases hook
travel and away from the other decreases the travel. Now,
turn the nut nearest the switch indicated as the “LOWER
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 raising the hook about 61 Centimeters
(2 feet) then lower the hook by jogging cautiously until the
lower limit switch stops downward motion. The stopping
point of hook should be the desired lower position. If not,
repeat the above instructions.
12.Double check setting by raising the hook about 61 cm
(2 feet) and then run the hook into the lower limit with
(DOWN) control held depressed.
13.Fine adjustment of the lower 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.
RECOMMENDED SPARE PARTS
To insure continued service of the Lodestar Hoist, the follow-
ing is a list of parts that are recommended to be kept on hand
at all times to replace parts that have worn or failed:
KEY NO. PART NAME
QTY. FOR EACH
HOIST IN
SERVICE
627-222 Limit Switch Kit 1
627-259 Brake Coil 1
627-261 Brake Friction Disc
Models B
All Other Models
1
2
627-1007 Transformer and Bracket Assembly 1
627-563 Control Station Parts Kit 1
627-565 Control Station Switch Kit 1
627-650 Contactor 1
Refer to Page 24 for ordering instructions and the Parts List for part
numbers.
Table 6.
LIMIT SWITCHES
Hook Travel Per Notch of Limit Switch Nut
MODEL MAX.
LENGTH
OF LIFT
M (ft.)
HOOK
TRAVEL
Per Notch
mm (in.)
A
mm (IN.)
Min.
B
(links)
Min.
C 62.2 (204)
33.3 (15/16)
38.1 (1½) 6
B, F 31.1 (102) 17.5 (11/16) 38.1 (1½) 6
J, L 38.1 (125) 19.0 (3/4) 38.1 (1½) 8
LL 77.4 (254) 37.3 (115/32) 38.1 (1½) 8
R 20.1 (66) 9.5 (3/8) 63.5 (2½) 8
RR 38.1 (125) 19.0 (3/4) 63.5 (2½) 8
13
LIMIT SWITCH
BRACKET
ROTATABLE LIMIT
SWITCH GUIDE