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secret that may not be reproduced, disclosed to third parties, altered or otherwise employed in any manner whatsoever without the express written consent of R&M Materials
Handling Inc. Copyright 2020 © R&M Materials Handling Inc. All rights reserved.
7.4
Movements
The hoist moves in the following directions.
Movements
Description
1. Hoist movements
Vertical up and down movements of the lifting device
2. Trolley movements
Horizontal movements of the trolley
Essential prerequisites for this section
WARNING
When operating the product, make sure that there are no people situated
underneath or nearby the load. Operating the product when people are
underneath or near the load could cause death or serious injury.
NOTICE
Do not deliberately use mechanical limit switches to stop the motion. Always stop the
motion, before reaching the mechanical end limits, by using the control devices on the
controller.
NOTICE
If the product malfunctions during use, push the emergency stop button and contact
the supervisor.
Note:
Motors get hot when they are running, even without a load on the hook. Operate the motors at the
highest practical safe speed because low speeds generate more heat. Allow the motors to cool down frequently
so that they do not overheat. Refer to the owner’s manual for the maximum permissible continuous operation
times. If a motor gets too hot then the thermostat will prevent further operation.
7.4.1
Motor Control Methods
The components
are controlled by a variety of electrical circuits called “drive circuits”. The motors can all be driven
by the same type of drive circuits or a mixture of types.
Note:
Sudden speed changes increase wear on motors and brakes.