Siemens SINUMERIK 840D sl Function Manual page 174

Detailed description
2.3 Continuous -path mode
Path criterion
The size of the rounding area can be controlled by path criteria ADIS and ADISPOS. These
are the precoincidences for the block change. ADIS and ADISPOS describe the distance,
which the rounding block may begin, at the earliest, before the end of the block or the
distance after the end of block within which the rounding block must be terminated.
Figure 2-4
Acute angles produce rounding curves with a large degree of curvature and therefore cause
a corresponding reduction in velocity.
Parameterization of the path criterion
• ADISPOS is programmed in the same way as ADIS, but must be used specifically for
• ADIS and ADISPOS are preset in the part program.
Scope of the path criterion
• ADIS or ADISPOS must be programmed. If the default is "zero", G641 behaves like G64.
• If only one of the blocks involved is rapid traverse G00, the smaller rounding distance
• If a very small value is used for ADIS, the control must make sure that every interpolated
• Irrespective of ADIS and ADISPOS, the rounding area is limited by the block length.
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Example for rounding an angular block transition
movements in rapid traverse mode (G00).
For example, ADIS = 0.3 indicates a path criterion with a rounding distance of 0.3 mm
(ADISPOS is the same).
applies.
block, even an intermediate rounding block, contains at least one interpolation point. The
maximum path velocity is thereby limited to ADIS/interpolation cycle.
Basic logic functions: Continuouspath Mode, Exact Stop, LookAhead (B1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0