Yaskawa J50M Instructions - Manual (Page 58)

2.9.20 TOOL LENGTH COMPENSATION
(G43, G44, G49)
The tool length compensation function is for add-
ing or subtracting the stored tool offset values
to the Z-axis coordinate instruction values for
the purpose of compensating for the deviations
in tool length,
G codes for tool length compensation
G code Group Meaning
G43 08 (+) direction
G44 08 ( -) direction
G49 08 cancel
G43 and G44 are modal functions, remaining
effective when once commanded until
by G49.
G49 cancels tool length compensation effects.
HOO also cancels tool length compensation effects.
The tool length compensation function is pro-
grammed in the following format.
A .
Z.. . . ;
With this command, the tool moves towards
the Z- coordinate position which is
the sum of (or difference between) the H
value and the Z value.
As the” result, the
tool point is displaced from the specified
Z-coordinate position by the distance spec-
ified by the H code.
B.
c.
Z.. . ;
H . . . ;
With this command, the tool is shifted by
the distance specified by the G code.
. . ;
H.. . ; . . . . . (2)
With the command (2) , the tool is shifted
by the difference between the previous
tool offset value and the new tool offset
value.
When G43, G44 and G49 are to be commanded,
the accompanying 01 group G codes must be
GOO, GO1 or G60. When G02 or G03 is used,
this is regarded as an error.
Direction of shift
The direction of tool shift is determined by the
sign of tool offset value as programmed in the
H code and by the G code used.
G43
G44
Sign of tool offset value
Positive N e g a t i v e
Plus direction Minus direction
Minus direction Plus direction
50