Preventing rounding off of outside corners with M197

Application

With M197 the control extends a radius-compensated contour at the corner tangentially and inserts a smaller transition arc. That way you prevent the tool from rounding off the outside corner.

Description of function

Effect

M197 is in effect blockwise and only for radius-compensated outside corners.

Application example

Contour without M197

Contour with M197

* - ...

; Approach the contour

11 X+60 Y+10 M197 DL5

; Machine the first contour with a sharp edge

12 X+10 Y+60 M197 DL5

; Machine the second contour with a sharp edge

* - ...

; Machine the remaining contour

With M197 DL5 the control extends the contour at the corner tangentially by up to 5 mm. In this example, the 5 mm exactly correspond to the tool radius, resulting in an outside corner with a sharp edge. The control uses the smaller transitional arc to nevertheless move along the traverse path gently.

Without M197 and with active radius compensation the control inserts a tangential transitional arc at an outside corner, which leads to rounding off of the outside corner.

Input

If you define M197, the control continues the dialog and prompts you for the tangential extension DL. DL is the maximum length by which the control extends the outside corner.

Note

In order to produce corners with sharp edges, define the parameter DL with the same size as the tool radius. The smaller the value you enter for DL, the more the corner will be rounded off.

Definition

Abbreviation

Definition

DL

Maximum tangential extension