Siemens SINUMERIK 840Di sl Programming Manual page 528

Glossary
Automatic
Operating mode of the control (block sequence operation according to DIN): Operating Mode
in NC systems in which a -> parts program is selected and continuously executed.
Auxiliary functions
Auxiliary functions can be used to transfer -> parameters to the -> PLC in -> parts programs,
where they trigger reactions which are defined by the machine manufacturer.
Axes
In accordance with their functional scope, the CNC axes are subdivided into:
• Axes: interpolating path axes
• Auxiliary axes: non-interpolating feed and positioning axes with an axis-specific feed rate.
Axis address
See -> axis identifier
Axis identifier
Axes are labeled in accordance with DIN 66217 (for a clockwise orthogonal -> coordinate
system) with the letters X,Y, Z.
-> Rotary axes which rotate around are labeled with the letters A, B, C. Additional axes
parallel to the above can be identified with further address letters.
Axis name
See -> axis identifier
B spline
With the B-Spline, the programmed positions are not interpolation points, as they are just
"control points" instead. The generated curve only runs near to the control points, not directly
through them (optional 1st, 2nd or 3rd order polynomials).
Backlash compensation
Compensation for mechanical machine backlash, e.g. backlash on reversal for feed screws.
Backlash compensation can be entered separately for each axis.
Backup
Saving the memory contents to an external memory device.
528
Auxiliary axes are not involved in the actual machining, and include for example tool
feeders and tool magazines.
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
Fundamentals