Rockwell Automation 150 MNL/SMC DIALOG+/APP-PROD GUIDE - Manual (Page 124)

4-42 Application Profiles for the SMC Dialog Plus Controller
Figure 4.41 Ball Mill Soft Start and with Accu-Stop Option
Problem: An across-the-line starter was used in a ball mill
application. An electronic braking package was used to
stop the mill. The mill had to be jogged excessively to
position the port for loading. Gearbox problems wer
caused by the starting torque surges. The application
required a cost-effective method to position the mill and
control the stopping.
Solution: The SMC Dialog Plus controller with the Accu-Stop
option was installed on the mill. The Accu-Stop option
allowed the drum to brake down to 15% slow speed and
rotate the loading port into position before stopping. Th
SMC Dialog Plus controller required less space and
power wiring than the across-the-line starter and braking
package.
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480 Volts
150 HP
Loading Port
Drum
Substance
Ball Shot
Gearbox Motor