
OPERATION
B–63614EN/01
11. SETTING AND DISPLAYING DATA
687
The bidirectional pitch error compensation function allows independent
pitch error compensation in different travel directions. (When the movement
is reversed, compensation is automatically carried out as in a backlash.)
To use this function, specify pitch error compensation for each travel
direction, that is, separately for the positive and negative directions of a
movement.
When using bidirectional pitch error compensation (setting the BDP bit
(bit 0 of parameter 3605) to 1), specify the following parameters in
addition to the pitch error compensation parameter.
D Number of the pitch error compensation point at the negative end (for
travel in the positive direction, for each axis): Parameter 3620
D Number of the pitch error compensation point at the positive end (for
travel in the positive direction, for each axis): Parameter 3621
D Number of the pitch error compensation point at the negative end (for
travel in the negative direction, for each axis): Parameter 3626
D Number of the pitch error compensation point at the positive end (for
travel in the negative direction, for each axis): Parameter 3627
Procedure for displaying and setting the pitch error compensation data
1 Set the following parameters:
D Number of the pitch error compensation point at the reference
position (for each axis): Parameter 3620
D Number of the pitch error compensation point having the smallest
value (for each axis): Parameter 3621
D Number of the pitch error compensation point having the largest
value (for each axis): Parameter 3622
D Pitch error compensation magnification (for each axis): Parameter
3623
D Interval of the pitch error compensation points (for each axis):
Parameter 3624
D Travel distance per revolution of pitch error compensation of the
rotary axis type (for each axis): Parameter 3625
When using bidirectional pitch error compensation (setting the BDP bit
(bit 0 of parameter 3605) to 1), specify the following parameters in
addition to the pitch error compensation parameter.
D Number of the pitch error compensation point at the negative end (for
travel in the positive direction, for each axis): Parameter 3620
D Number of the pitch error compensation point at the positive end (for
travel in the positive direction, for each axis): Parameter 3621
D Number of the pitch error compensation point at the negative end (for
travel in the negative direction, for each axis): Parameter 3626
D Number of the pitch error compensation point at the positive end (for
travel in the negative direction, for each axis): Parameter 3627
Bidirectional pitch error
compensation
Procedure