HEIDENHAIN MANUALplus 620 137
2.11 Units—Special Operations
2.11 Units—Special Operations
"Program beginning (START)" unit
In the start unit, default values that are used in the following units are
defined. The start unit is called once at the beginning of the machining
section. You also directly specify the rotational speed limits, zero point
shift and tool change point for the program.
Unit name: Start / Called cycle: None
Soft keys in the program beginning form
Loads the zero point defined during
setup
Loads the tool-change point defined
during setup
“Limits” form
S0 Maximum main spindle speed
S1 Maximum rotational speed of driven tool
Z Zero point shift (G59)
“TC point” form (tool change point)
WT1 Tool change point
No axis (do not approach the tool change point)
0: Simultaneous (X and Z axes depart diagonally)
1: First X, then Z
2: First Z, then X
3: Only X
4: Only Z
5: Only Y
6: Simultaneous with Y
WX1 Tool change point in X (reference: distance of the slide
position as radius value from the machine zero point)
WZ1 Tool change point in Z (reference: distance of the slide
position from the machine zero point)
WY1 Tool change point in Y (reference: distance of the slide
position from the machine zero point)
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