Yaskawa SGDH Linear Sigma Series - Manual (Page 288)

9 Operation
9.7.7 Encoder Signal Output
9-44
„ Relation between Linear Scale by Renishaw and Encoder Output Signals from the SERVO-
PACK
For some models of the Renishaw linear scales, the position at which the zero-point signal (Ref) is output
varies in accordance with the direction of movement.
If combining the SERVOPACK with one of those models, phase C pulses are output from the SERVOPACK
in two places.
For more details of the linear scale zero-point signals, refer to the instruction manual for the linear scale
being used.
• When passing the first zero-point signal (Ref) forward after the power supply is turned ON
• When passing the first zero-point signal (Ref) in reverse after the power supply is turned ON
IMPORTANT
Machine position (Forward)
Power ON
Zero-point
signal (Ref)
Phase C
Time
The linear scale does not output a zero-point signal (Ref).
When moving forward this position, however, is where phase C
is output from the SERVOPACK. Phase C is output even when
moving in reverse.
The width of the second
pulse is half of phase A.
Machine position (Forward)
Power ON
Zero-point
signal (Ref)
Phase C
Time
The linear scale does not output a zero-point signal (Ref).
When moving in reverse this position, however, is where phase C
is output from the SERVOPACK. Phase C is output even when
moving forward.
The width of the second
pulse is half of phase A.