
15. ACCURACY COMPENSATION
FUNCTION B–63682EN/01
NC FUNCTION
106
The errors caused by machine position, as pitch error of the feed screw,
can be compensated. This function is for better machining precision.
As the offset data are stored in the memory as parameters, compensations
of dogs and settings can be omitted. Offset intervals are set constant by
parameters (per axis). Total offset points are:
Total offset points = 128 × controlled axes.
Optional distribution to each axis can be done by parameter setting. As
each position:
Offset pulse = (–7 to +7) (magnification)
Where Offset pulse unit is the same as detection unit
Magnification: 0 to 100 times, set by parameter (per axis)
When a pitch error of a feed screw has a constant slope, you only need to
select four representative points (a, b, c, d) from pitch error compensation
points and set slope data for the four points; unlike pitch error
compensation, you need not set compensation data for every
compensation point. Then, compensation data at each compensation
point is calculated automatically for compensation. (When movement
along an axis for which slope compensation data is set is made,
compensation is performed for that axis.)
Pitch error compensation is required to use this function.
b
a
c
d
15.1
STORED PITCH
ERROR
COMPENSATION
15.2
SLOPE
COMPENSATION