Pitch Error Compensation - Okuma OSP-U100M Operation Manual

4203-E P-425
SECTION 3
DESCRIPTION OF PARAMETER AND SETTING PROCEDURE
12.
Pitch Error Compensation
The
ball
screws each have their own pitch-to-pitch errors, which may be compensated
for by the setting of
the pitch error compensation data.
The pitch error compensation data provides a total of 2304 values for all the axes (384 values for each
axis).
Before setting the pitch error compensation value, use the following procedure:
(1) Set the P PITCH ERR COMP and N PITCH ERR COMP on screen 1 of
the system parameter.
This determines the range of the screw pitch offset
-
from what position (N) to what position (P)
in
that ball screw.
(2) Set the PITCH ERR COMP SPAN on screen 6 of the system parameter.
This determines the pitch between values for the screw pitch offset.
(3) In NC optional parameter (word) No. 33, set the total number of screw pitch
compensation
values for all the axes.
(4) Set the PITCH POINT on screen
6
of the
system parameter.
This
sets
the
number of
pitch error
compensation points for
individual axes
(max.: 384 points per
axis). Setting is possible for individual axes and it should be made in the order of X, Y, Zthe 4th, the
5th and the 6th axes.
In
the
explanation given above, setting operation should be referred
to the following sections:
For system parameter setting procedure, refer
to 11.
"System Parameter".
For NC optional
parameter (word) setting procedure, refer to 6. "NC Optional Parameter (Word)".