Siemens SINUMERIK 840D sl Turning Operating Manual page 40

Introduction
2.3 Machine control panels
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Traversing axes with rapid traverse override and coordinate switchover
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Spindle control with override switch
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<REF POINT>
Approach reference point.
Inc <VAR> (Incremental Feed Variable)
Incremental mode with variable increment size.
Inc (incremental feed)
Incremental mode with predefined increment size of
1, ..., 10000 increments.
Machine manufacturer
A machine data code defines how the increment value is interpreted.
Axis keys
Selects an axis.
Direction keys
Select the traversing direction.
<RAPID>
Traverse axis in rapid traverse while pressing the direction key.
<WCS MCS>
Switches between the workpiece coordinate system (WCS) and machine
coordinate system (MCS).
<SPINDLE STOP>
Stop spindle.
<SPINDLE START>
Spindle is enabled.
Operating Manual, 06/2019, A5E44903486B AB
Turning