Mitsubishi Electric C70 Setup Manual page 424

(2) Memorized relative position compensation
This method‚ according to the parameters specified in advance‚ compensates the relative position error
between two orthogonal axes caused by deflection of the moving stand.
For this‚ as shown in the following figure‚ specify the compensation amount in the compensation axis
direction in the division points obtained by equally dividing the machine coordinates of the base axis.
The section between division points n and n+1 is compensated smoothly by linear approximation.
The base axis is one of the two orthogonal axes to which relative position compensation applies. This
axis is used as the criterion for relative-error measurement. The compensation axis is the coordinate axis
that is orthogonal to the base axis. The compensation is actually made for this coordinate axis.
Actual machine position
of compensation axis
Reference position
Compensation
amount
Fig. 1.2 Relationship between the compensation amount and machine position
Appendix 1.15 Machine Error Compensation Function Outline
Actual machine position for
which no compensation
has been made
▲ ▲
ｎ
ｎ＋1
▼
▼
Compensation amount
between division points
C70 Setup Manual
▲
: Division point
Command machine
▲
position along base axis
ｎ＋2
▼
Command machine position
407