Look-ahead detection of contour violations

Look-ahead detection of contour violations

Motif in image database https://www.automation.siemens.com/bilddb/search.aspx?objkey=G_NC01_XX_00130

Behavior when tool radius > circle radius

Function

With collision detection CDON on and active tool radius compensation, the CNC monitors tool paths through look-ahead contour calculation. Potential collisions are promptly identified in this way and actively prevented by the CNC.

The CNC detects the following critical machining situations, e.g., when the tool radius is too large, and effects compensation through tool path modification.

• Bottleneck detection
  Because the tool radius is too large to produce a narrow inside contour, the bottleneck is bypassed and an alarm output.
• Contour path shorter than tool radius
  The tool bypasses the workpiece corner on a transition circle, then continues on the programmed path.
• Tool radius too large for internal machining
  In such cases, the contours are machined only as much as is possible without causing a contour violation.

Benefits

• Automatic avoidance of potential collisions in good time