Yaskawa G5 Spindle Orientation - Manual (Page 2)

Spindle Orientation
Date: 07/01/04, Rev: 04-07 Page 2 of 14 TM.G5SW.021
Open Loop Control with Position Encoder
The open loop control method may be used when the motor and the device to be positioned are connected through a
drivetrain with a constant ratio. Feedback into a PG option card from the position encoder attached to the device being
positioned is required.
Closed Loop Control
The closed loop control method may be used for better speed control and positioning characteristics when the drive
motor directly drives the device being positioned.
When using this method the motor encoder is used for positioning.
Closed Loop Control with Position Encoder
Closed loop control may be used when the motor and the device to be positioned are connected through a drivetrain with
a constant ratio. Feedback from an encoder attached to the device being positioned is required. This method will
provide better performance than the open loop method.