Detailed Description
2.4 Tool radius compensation 2D (TRC)
Basic logic functions: Tool Offset (W1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
63
DISR
DISR
Specifies the length of a straight approach line or the radius of an approach arc.
Retraction/approach with straight lines
On approach/retraction along a straight line,
DISR
specifies the distance from the cutter
edge to the start point of the contour, i.e., the length of the straight line with active TRC is
calculated as the total of the tool radius and the programmed value of
DISR
.
An alarm is displayed:
•
If
DISR
is negative and the amount is greater than the tool radius (the length of the
resulting approach line is less than or equal to zero).
Retraction/approach with circles
Approach/retraction with circles
DISR
indicates always the radius of the tool center point
path. If tool radius compensation is activated, a circle is generated internally, the radius of
which is dimensioned such that the tool center path is derived, in this case also, from the
programmed radius.
An alarm is output on approach and retraction with circles:
•
If the radius of the circle generated internally is zero or negative
•
If
DISR
is not programmed
•
If the radius value ≤ 0.
DISCL
DISCL
specifies the distance from point P2 from the machining plane.
If the position of point P
2
is to be specified by an absolute reference on the axis
perpendicular to the circle plane, the value must be programmed in the form
DISCL = AC(
....
)
.
If
DISCL
is not programmed, points P
1
, P
2
and P
3
are identical with
G340
and the approach
contour is mapped from P
1
to P
4
.
The system checks that the point defined by
DISCL
lies between P
1
and P
3
, i.e., in all
movements, which have a component perpendicular to the machining plane (e.g., infeed
movements, approach movements from P
3
to P
4
), this component must have the same
leading sign. It is not permitted to change direction. An alarm is output if this condition is
violated.
On detection of a direction reversal, a tolerance is permitted that is defined by the machine
data:
MD20204 $MC_WAB_CLEARANCE_TOLERANCE (direction reversal on SAR).
However, if P
2
is outside the range defined by P
1
and P
3
and the deviation is less than or
equal to this tolerance, it is assumed that P
2
is in the plane defined by P
1
and/or P
3
.
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
