Detailed Description
2.4 Tool: Tool radius compensation 2D (TRC)
Tool Compensation (W1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-75
2.4.12 Intersection procedure for polynomials
Function
If two curves with active tool radius compensation form an outside corner, depending on the
G code of the 18th group (corner behavior with tool compensation; G450/G451) and
regardless of the type of curves involved (straight lines, circles, polynomials):
• Either a conic is inserted to bypass the corner
Or
• The curves involved are extrapolated to form an intersection.
If no intersection is found with G451 activated, or if the angle formed by the two curves is too
steep, switchover to insert mode is automatic.
Machine data:
MD20256 $MC_CUTCOM_INTERS_POLY_ENABLE
is used to enable the intersection point procedure for polynomials.
Note
If this machine data is set to inactive, a block (can be very short) is always inserted (even if
transitions are almost tangential). These short blocks always produce unwanted drops in
speed during G64 operation.
2.4.13 G461/G462: Approach/retract strategy extension
Function
In certain special geometrical situations, extended approach and retraction strategies,
compared with the previous implementation, are required in order to activate or deactivate
tool radius compensation (see figure below).
Note
The following example describes only the situation for deactivation of tool radius
compensation. The response for approach is virtually identical.
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