Siemens sinumerik 840d Programming Manual page 171

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5.5 Settable path reference, SPATH, UPATH (SW 4.3 and higher)

• Rounding with G642

Rounding with axial tolerances is activated modally

by means of G642. Rounding does not take place

within a defined ADIS area, instead it ensures the

axial tolerances set in MD 33100:

COMPRESS_POS_TOL are adhered to.

The rest of the functionality is identical with G641.

Supplementary conditions

The path reference set is of no importance with

• linear and circular interpolation,

• in thread blocks and

• if all path axes are contained in FGROUP.

The path reference for the axes that are not contained in

FGROUP is set via the two language commands SPATH

and UPATH contained in the 45th G code group. The

commands are modal. If SPATH is active, the axes are

traversed synchronized with the path; if UPATH is active,

traversal is synchronized with the curve parameter.

SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) − 04.00 Edition

/FB/, B1, Continuous Path Mode,

Exact Stop and LookAhead

Special Motion Commands

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