Siemens SINUMERIK 840D Function Manual page 477

Mc axes and spindles

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Table of Contents

Approach response with FA at standstill

In this case, the time-optimized and path-optimized traversing modes are identical.

The table below shows the target positions and traversed paths with direction marker (in

brackets) for the particular approach modes:

Position of the fol‐

synchronized posi‐

lowing axis before

tion FaSysPos

Approach response for moving FA

The following axis moves at almost maximum velocity in the positive direction when the

coupling is activated by EGONSYNE. The programmed synchronized position of the following

axis is 110, the current position 150. This produces the two alternative synchronized positions

110 and 182 (see table above).

In the case of traversing mode NTGP (path-optimized), synchronized position 182 is selected

independent of the current velocity. This has the shortest distance from the current position of

the following axis. Traversing mode NTGT (time-optimized) considers the current speed of the

following axis and produces a deceleration on account of the limit for the maximum axis speed

to reach synchronism in the shortest possible time (see Figure).

Axes and spindles

Function Manual, 06/2019, A5E47437747B AA

Reaching the next tooth gap, FA path-optimized (top) vs. time-optimized (bottom)

Traversing mode

M3: Coupled axes

14.4 Electronic gear (EG)

Traversing mode

Sinumerik 840d sl