Siemens SINUMERIK 828D

W1: Tool offset
18.5 Tool radius compensation 2D (TRC)
Basic Functions
1460 Function Manual, 09/2011, 6FC5397-0BP40-2BA0
18.5.3 Approach and retraction behavior (NORM/KONT/KONTC/KONTT)
NORM and KONT
The NORM and KONT instructions can be used to control approach behavior (selection of tool radius
compensation with G41/42) and retraction behavior (deselection of tool radius compensation with G40):
Special points to be noted
• KONT only differs from NORM when the tool start position is behind the contour.
Figure 18-12 Example for selecting TRC with KONT or NORM in front of and behind the contour
• KONT and G450/G451 (corner behavior at outer corners) has a general effect and determines the approach
and retraction behavior with TRC.
• When tool radius compensation is deselected, the retraction behavior is determined by the NORM/KONT
instructions.
Command Significance
NORM Normal setting at start point/end point (initial setting)
KONT Follow contour at start point/end point
KONTC Approach/retraction with constant curvature
KONTT Approach/retraction with constant tangent
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