G43/G43.4/G44/G49: Tool Length Compensation (RTCP)

It is used to compensate for the length difference between tools, allowing all tools to be programmed with the same Z-axis position. Each tool has a dedicated length compensation value, which must be entered by the user.

G43: Tool length compensation positive (+) direction

G44: Tool length compensation negative (-) direction

H: The offset number where the tool length compensation value to be applied is written

G49: Tool length compensation off

Tool length compensation values can always be applied to the Z-axis, or they can be distributed to the X, Y, and Z axes depending on the selected plane. This selection can be adjusted using PRM320.

PRM320:

0: Tool length compensation is always applied to the Z-axis.

1: Tool length compensation is applied to the X, Y, and Z axes according to the selected plane.

G43.4: It has been allocated. Please contact HSC Control.

Writing of compensation values:

The tool length offset value can be used in different ways. The most common method of usage is as follows.

1-    T1 is considered the reference tool.

2-    The Z axis (or hole axis according to the plane) is touched to the surface of the part.

3-    At this point, the Z axis workpiece zero is set. (The Z absolute position becomes 0.0000).

4-    T2 is selected.

5-    The Z axis (or hole axis according to the plane) is touched to the surface of the part.

6-    The value of the Z axis absolute position is written as compensation to H2.

7-    For each tool, the process is repeated starting from step 4.

Example:

M6 T1           (TAKE T1)

M3 S2000        (SPINDLE CW ROTATION)

G43 H1          (APPLY H1 AS TOOL LENGTH COMPENSATION)

(DRILL TO THE POINT X100 Y-250.)

(RETURN TO THE R POINT AFTER THE DRILLING OPERATION)

G90 G99 G81 X100. Y-250. Z-150. R10. F120.

G80 G53 G00 Z0. (MOVE TO THE SAFE Z POSITION)

G49             (TOOL LENGTH COMPENSATION OFF)

M6 T2           (TAKE T1)

M3 S2000        (SPINDLE CW ROTATION)

G43 H2          (APPLY H2 AS TOOL LENGTH COMPENSATION)

(DRILL TO THE POINT X200 Y-250.))

G81 X200. Y-250. Z-150. R10. F120.

G80 G53 G00 Z0. (GO TO Z AXIS REFERENCE)

G49             (TOOL LENGTH COMPENSATION OFF)

M5              (SPINDLE STOP)