R&M Materials Handling WIRE ROPE HOISTS Service - Manual (Page 11)

R&M Materials Handling, Inc.
4501 Gateway Boulevard
Springfield, Ohio 45502
P.: (937) 328-5100
FAX: (937) 325-5319
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R&M Materials Handling, Inc. reserves the right to alter or amend the above information without notice.
3.5.1 Using the pushbuttons (two steps, contactor control)
c_cots2a
A. Position of pushbutton (0, 1 and 2)
B. Speed
The position of the pushbutton affects the speed as follows:
• Position 0: Neutral position. Motion stops.
• Position 1: Slow speed.
• Position 2: High speed.
!
A skilled operator always uses the low speed (step 1) when starting to hoist. Slack is taken
out of rigging and the wire rope is subjected to the load in the low speed. Be aware of load
balance as the load is hoisted from floor level. Proceed to high speed (step 2) when the load
is clear of all obstacles. When lowering the load, a skilled operator controls the lowering
speed from High to Low speed when setting the load. Low speed allows time to maneuver
load into position. Minimal jogging (or inching) may be required. DO NOT JOG FROM
NEUTRAL TO HIGH SPEED POSITION OR VICE VERSA.
3.5.2 Using the pushbuttons (EP-mode, optionally used with Inverter controls)
c_coep2a
A. Position of pushbutton (0, 1 and 2)
B. Speed
Variable speed with 2 step pushbutton - (Electronic Potentiometer)
The position of the pushbutton affects the speed as follows:
• Position 0: Neutral Position. Controls motion to slowdown and stop.
• Position 1: Start in low speed and Hold speed Command.
- When starting the movement in first step, go to low speed is initiated.
- When speeding up (pushing step 2, accelerate to high speed) and a desired speed is reached return to
position 1, the Inverter control will hold the speed the motion has reached. A quick, back and forth
movement between position 1 & 2 can provide the crane operator variable speeds for safer and more
productive operation.
- When slowing down (release button to neutral) and returning to position 1, the Inverter control will hold the
speed the motion has attained. A quick, back and forth movement between position 0 & 1 again provides