3.5 Tool radius compensation G40/G41/G42

3.5.1 Tool radius compensation step

                      Fig.3.3 Tool radius compensation

As shown in Fig.3.3, tool radius compensation is divided into three steps::

1. Tool compensation creation(start)

The tool approaches the workpiece from the starting point. Base on the programmed path, the tool center offset a certain distance to the left (G41) or to the right (G42).

2. Tool compensationon going

Tool center path offset a certain distance to pragram path.

3. Cutter compensationcancel

Retract, end point of the tool center path coincides with the programmed path.

3.5.2 Instruction format

G41 / G42 activate tool tip radius compensation.

                      Fig.3.4 Tool tip radius compensation 

1. G41 X… Z… ; Tool radius compensation left of contour

2. G42 X… Z… ; Tool radius compensation right of contour

The selection can only be made for linear interpolation (G0, G1).

                                              Fig.3.5 Start of the tool radius compensation

                                        Fig.3.6 End of the tool radius compensation

3. Tool radius compensation OFF: G40

The compensation mode can only be deselected with linear interpolation (G0, G1).

3.5.3 Interference detection

Tool center path after offset appears intersection in non-adjacent segment, that occurs interference. If the tool is operated absolutely along the trace, overcut must occur.

                            Fig.3.7 overcut

The system has a certain fault tolerance, in some case it can automatically eliminate interference and generate a new track of machining; when interference can not be eliminated the system alarms an error and aborts.

Note

1. Whentool compensationis active,you can not program with the following instructions:

1)G17/G18/G19;

2)G33;

3)G53~G59,G500/G501;

4)During theexecution oftool compensation, you can notchange the toolandtool compensation number.

2. The G41 ⇄ G42 compensation direction can be changed without writing G40 in between.

3. The compensation mode can only be took effect or deselected with G00, G01.

0 (0)
Article Rating (No Votes)
Rate this article
Attachments
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Full Name
Email Address
Security Code Security Code
Related Articles RSS Feed
3.3 Tool offset table
Viewed 995 times since Fri, Aug 26, 2016
5.2.2 Drilling, counterboring CYCLE82
Viewed 779 times since Fri, Aug 26, 2016
3.2 Tool offset number D
Viewed 757 times since Fri, Aug 26, 2016
5.3.3 Rough turning CYCLE95
Viewed 1103 times since Fri, Aug 26, 2016
5.2.3 Deep-hole drilling CYCLE83
Viewed 1210 times since Fri, Aug 26, 2016
1.6 Program structure
Viewed 730 times since Thu, Aug 25, 2016
1.5 Variable definition
Viewed 851 times since Thu, Aug 25, 2016
1.7 The instructions table
Viewed 804 times since Thu, Aug 25, 2016
5.3.6 Copy cutting CYCLE99
Viewed 1650 times since Fri, Aug 26, 2016
2.1 Absolute / incremental dimensioning: G90/G91, AC/IC
Viewed 1241 times since Thu, Aug 25, 2016