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 |
NC programs contained in this User's Manual are suggestions for solutions. The NC programs or individual NC blocks must be adapted before being used on a machine.
Change the following contents as needed:
- Tools
- Cutting parameters
- Feed rates
- Clearance height or safe position
- Machine-specific positions (e.g., with M91)
- Paths of program calls
Some NC programs depend on the machine kinematics. Adapt these NC programs to your machine kinematics before the first test run.
In addition, test the NC programs using the simulation before the actual program run.
With a program test you determine whether the NC program can be used with the available software options, the active machine kinematics and the current machine configuration.
* - ... | ; 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 |