Yaskawa MP940 - Manual (Page 417)

11.2 Control Modes
11-15
11
11.2.4 Phase Control Mode
„ Overview
This mode is used to rotate the motor according to the specified speed reference, and at the
same time to strictly control the number of rotations.
Electronic shafts and electronic cams can thus be used in the servomotors of complex
machine configurations. Phase alignment and synchronous operation, as well as ratio opera-
tion and cam variable speed operation have all been replaced by software.
Fig 11.7 Electronic Cam and Electronic Shaft Illustration
„ Details
Use the following procedure to perform phase control operation.
1. Set the motion parameters. Use the user program to control the reference speed so that
no shock occurs.
The following three methods can be used to set the setting parameters.
• Using the CP-717 Setting Parameter Screen
• Using a ladder logic program
• Using a motion program
M
M M M
MP920
Using a machine to perform
conventional synchronous
operation (Line shaft and cam
system)
Controller
Driver
Gear Gear Gear
Cam
No.1 roll No.2 roll Cam machine
Using the MP940 to perform synchro-
nous operation (Electronic shaft and
electronic cam system)
Driver
No.1 roll No.2 roll Cam machine
MP940
PCON
RUN
0
100%
1 Set the motion setting parameters.
2 Select the phase control mode (PHCON).
3 Start the phase control mode operation.
Phase control operation is performed.
4 Set the phase control mode to OFF.
: System execution
: User settings
Speed
(%)
Reference
speed
Position
Time
(t)