Measuring The Deviation From Synchronism - Siemens SINUMERIK 840D sl Function Manual

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There are two different options for determining the deviation from synchronism:
1. The deviation from synchronous operation is determined by the NCK (see "Measuring the
deviation from synchronism (Page 435)").
2. The deviation value is already known and entered by the user directly (see "Entering the
deviation from synchronism directly (Page 438)").
In both cases, the deviation value is then incorporated into the setpoint value calculation for
the following spindle, as a correction value.
Availability
The "track the deviation from synchronism" function was developed for machine couplings
(CPFRS="machine"). This means that it is also available for the "synchronous spindle"
coupling type (CPSETTYPE="COUP").
Like the other higher-level movements, the availability of the function (e.g. speed difference)
depends on the option (see "Requirements (Page 368)").
8.5.13.2

Measuring the deviation from synchronism

The controller measures the difference between the setpoint positions and actual positions
when the following spindle is operating in synchronism. This results in a correction value, which
is saved in a system variable.
Special functions
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
M3: Coupled axes
8.5 Generic coupling
435