HEIDENHAIN TNC 426 PB/M Technical Manual page 371

Example
December 2001
The following dependencies apply for axes 2 = Y and 3 = Z:
n
Ballscrew pitch error in Z and Y: Z = F(Z) and Y = F(Y)
n
Axis sag in Z depending on Y
n
Traverse range: Z = 800 mm, Y = 500 mm
n
Datum point of compensation values: Z = –200 mm, Y = –90 mm
n
Desired spacing of compensation points: 7 mm
Calculations:
Input values for the spacing of the compensation points:
16
possible powers of 2
Number of compensation points:
500 mm
----------------------------- - =
77 compensation points in Y
6.5536 mm
800 mm
----------------------------- - =
123 compensation points in Z
6.5536 mm
Entries:
Axis Error Compensation
= 6.5536 mm
Y axis:
Ballscrew pitch
error in column
2 = F(), sag
error in column
3 = F()
Z axis:
Ballscrew pitch
error in column
3 = F()
6 – 41