DEUTSCHMANN AUTOMATION ROTARNOCK 100, Инструкция по эксплуатации

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4.12.20 Instruction manual ROTARNOCK 100 V. 3.6 45
Deutschmann Automation GmbH & Co. KG Technical details
3) Resolution
This value indicates how long the shortest cam which can still definitely be evaluated by the
cam control is.
4) Idle time resolution (TZA)
This error occurs only if an idle time is programmed for the corresponding output. It is speci-
fied in ms and represents the sampling time of the encoder speed, serving as the basis of
TZK (idle time compensation).
In general, the SV and WG are each shorter than the cycle time of the cam control. This means
that the actual switch point lies between instants "Switch-on time + SV" and "Switch-on time + SV
+ WG", as indicated in the diagram below.
Without idle time compensation, the resolution is 1 increment, provided the maximum encoder
speed is not exceeded, i.e. even a cam with a length of 1 increment is still reliably detected and
set by the cam control.
If the encoder speed (V
encoder
) is exceeded n-fold, the resolution increases accordingly to n
increments.
If you work
with idle time compensation, the error merely increases by 1 increment since the cor-
rection of the TZK is maximum ±1 increment with each change of the encoder position owing to
the "dynamic brake" implemented in ROTARNOCK.
To summarize, we can state the following formula:
Without idle time compensation:
Actual switch point = ideal switch point + SV (const) + WG
SV < cycle time (constant, typically cycle time/2)
WG < cycle time (fluctuating between 0 and cycle time)
Resolution = n increments with V
encoder
< n * V
encoderMax
With idle time compensation:
Actual switch point = ideal switch point + SV (const) + WG + TZA
SV < cycle time (constant, typically cycle time/2)
WG < cycle time (fluctuating between 0 and cycle time)
TZA = Resolution of the TZK (typically 1 ms)
Resolution = n increments, with V
encoder
< n * V
encoderMax
, whereby V
encoder
const.
Resolution = n+1increments, with V
encoder
< n * V
encoderMax
, whereby V
encoder
variable.