Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE User Manual
Page 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