Setting Zeros, Workpiece Measuring And Tool Measuring; Preset Actual Value Memory And Scratching - Siemens SINUMERIK 840D sl Function Manual

Measurement (M5)

8.4 Setting zeros, workpiece measuring and tool measuring

8.4 Setting zeros, workpiece measuring and tool measuring
8.4.1

Preset actual value memory and scratching

Preset actual value memory
Preset actual value memory is initiated by means of an HMI operator action or via measuring
cycles. The calculated frame can be written to system frame $P_SETFRAME. The setpoint
position of an axis in the WCS can be altered when the actual value memory is preset.
The calculation is performed in the NC when a PI service is activated via
● HMI operator action or a
● Part program command from the measuring cycles.
A tool and a plane can be selected as a basis for the calculation. The calculated frame is
entered in the result frame.
Scratching
The term scratching refers to both the workpiece and tool measurement. The position of the
workpiece can be measured in relation to an edge, a corner or a hole. To determine the zero
position of the workpiece or the hole, setpoint positions can be added to the measured
positions in the WCS. The resulting offsets can be entered in a selected frame. In the tool
measurement, the length or radius of a tool can be measured using a measured reference
part.
The measurements can be initiated via
● HMI operator action or via
● Measuring cycles.
Communication with the NC takes place via predefined system variables. The calculation is
performed in the NCK when a PI service is activated via:
● the HMI operator action
● or through a part program command from the measuring cycles.
A tool and a plane can be selected as a basis for the calculation. The calculated frame is
entered in the result frame.
For more detailed information about channel-specific system frames, please see:
/PGA1/ List of System Variables; Chapter "Frames".
/FB1/ Function Manual for Basic Functions, Axes, Coordinate Systems, Frames (K2),
Chapter "Frames of the Frame Chain"
Additional references:
/BAD/ BEM/BEMsl Operator's Guide, HMI Advanced / Embedded; Chapter "Scratching".
/PGZ/ Programming Manual, Cycles; Chapter "Swiveling - CYCLE800"
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Function Manual, 01/2008, 6FC5397-1BP10-3BA0
Extended Functions