Positioning From Standstill - Siemens SINUMERIK 840D Function Manual

Mc axes and spindles

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Positioning from standstill

A distinction is made between two cases with regard to positioning from standstill:

● Case 1: The spindle is not synchronized.

This is the case if the spindle is to be positioned after switching on the control and drive or

after a gear step change (e.g. for a tool change).

MD31040 $MA_ENC_IS_DIRECT = 0

● Case 2: The spindle is synchronized.

This is the case if, after switching on the control and drive, the spindle is to be rotated

through a minimum of one revolution with M3 or M4 and then stopped with M5

(synchronization with the zero mark) before the first positioning action.

Axes and spindles

Function Manual, 06/2019, A5E47437747B AA

S1: Spindles

18.2 Operating modes

Sinumerik 840d sl