Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador descarregar pdf (Página 107)

Application Profiles for the SMC Dialog Plus Controller

4-25

Figure 4.24 Wire Draw Machine with Soft Start

Problem: An across-the-line starter was used on a wire draw

machine to pull wire. This rapid cycling application

caused mechanical wear on both the chain and th

electromechanical starter. Other soft starts had been

experimented with, but not enough torque was developed

to pull the wire through the die.

Solution: The SMC Dialog Plus controller was installed to

accelerate the motor smoothly. The kickstart feature was

adjusted to provide enough torque to pull the wire

through the die. After the initial kickstart, the controller

went back to the soft start acceleration mode, reducing

the amount of starting torque on the chain and helping to

lower maintenance inspection and repair time. The

controller was set for a 9-second ramp time.

Die

Unwind

Spool

Wire

575 Volts

5 HP

Take-Up Spool

Chain

Motor

1 2 ... 102 103 104 105 106 107 108 109 110 111 112 ... 201 202

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Rockwell-automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE Manual do Utilizador Página 107