140
6 SERVO MOTOR DRIVING
6.2 Point table mode (pt)
Backlash compensation
Set [Pr. PT14 Backlash compensation] to stop the servo motor at the compensated position for the setting value of backlash
compensation when reversing the command direction of automatic operation.
Backlash compensation is available with servo amplifiers with software version A8 or later.
Before use, make sure that the meshing gap between the gears or feed screws on the machine side and the
motor side occurs on one side only.
The timing chart is for when the target position is set as follows and the backlash compensation amount is set to 10.
Home position return method in which the servo motor operates during home position
return
The backlash compensation direction is determined by the home position return direction just before home position return
completion.
Point table No.
Target position [pulse]
1
1000
2
2000
ON
OFF
ON
OFF
1000
2000
1000 - 10
2000
0 r/min
Status DO 2 bit 15
Target point table
Power supply
Forward
rotation
Servo motor speed
Reverse
rotation
No. 0
No. 1
No. 2
No. 1
No. 2
Servo motor current position
Home position return
As the rotation direction immediately before home position return is in the forward rotation,
backlash compensation is applied when positioning is performed in the reverse rotation.
