
B-63783EN-1/01 1.AXIS CONTROL
- 125 -
1849 Backlash compensation amount used for rapid traverse for each axis
[Input type] Parameter input
[Data type] Integeraxis
[Unit of data] detection unit
[Valid data range] -9999 - 9999
Set the backlash compensation amount used in rapid traverse for each axis. (This
parameter is valid when RBK, #6 of parameter 1804, is set to 1.)
More precise machining can be performed by changing the backlash compensation
amount depending on the feedrate, rapid traverse or the cutting feed for positioning.
Let the measured backlash at cutting feed be A and the measured backlash at rapid
traverse be B. The backlash compensation amount is shown below depending on
the change of feedrate (cutting feed or rapid traverse) and the change of the
direction of movement.
Change of
feedrate
Change
of direction of
movement
Cutting
feed to
cutting
feed
Rapid
traverse
to rapid
traverse
Rapid
traverse
to cutting
feed
Cutting
feed to
rapid
traverse
Same direction 0 0 ±α ±(-α)
Opposite direction ±A ±B ±(B+α) ±(B+α)
Note 1) α=(A-B)/2
Note 2) The signs (±) of compensation values indicate the same directions as
those used for indicating movement directions.
1850 Grid shift/reference position shift for each axis
[Input type] Parameter input
[Data type] Integeraxis
[Unit of data] detection unit
[Valid data range] 0 - 99999999
Specify the grid shift for each axis.
The grid position can be shifted by the amount specified in the
parameter to move the reference position. The grid shift must not
exceed the reference counter capacity (RC1x to RC4x (bits 0 to 3 of
parameter No. 1816) or parameter No. 1896).
NOTE
When SFD (bit 4 of parameter No. 1008) is set to 1, this
parameter indicates the "reference position shift amount for each
axis." In this case, the valid range is:
-999999999 to 999999999.