Manual

Tool Tip Radius Compensation (TTRC)

Function

Chapter 21

21-50

specified, the control executes the move prior to the return to home

operation as an exit move. This can cause undesired overcutting of the

part.

If compensation was not cancelled using a G40 command before returning

to machine or secondary home points, the control automatically

re-initializes TTRC for the return from machine or secondary home points.

This is done by using the move to the intermediate point, as designated

when the operation was performed as an entry move for compensation.

Figure 21.45 shows either a G28 or G30 block followed by a G29 block:

Figure 21.45

TTRC During G28, G30, and G29 Blocks

Temporary cancelof

compensation here

at intermediate point

Reference point

Programmed

path

G41

N11

N12

N13

N13’

N14’

N15

N14