Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador descarregar pdf (Página 18)

1-10

STC Starting Torque Controller

Applications (cont.)

Figure 1.12 Crane with Torque Control

Problem: An overhead crane required frequent jogging due to

adjustments in the traverse (horizontal) position. An

across-the-line starter was used and this caused overshoot

or undershoot when trying to position over a load.

Solution: The STC controller was installed in the application. By

reducing the starting torque of the motor, this allowed th

crane to be positioned effectively. This meant fewer

starts were required to position the crane over the load.

This solution reduced the maintenance required as well

as improved the productivity of the crane. The STC

controller was a cost effective solution.

Traverse Motor (STC Controlled)

480 Volts

2 HP

Track

Load

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Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador Página 18