Fagor CNC 8060, Руководство по установке

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Installation manual.
CNC 8060
CNC 8065
MACHINE PA
RAMETERS.
2.
Machin
e
parame
ters
for the
axe
s
an
d
spind
les.
·157·
(R
EF
: 1709)
ULTRAIPO
(Not being used at this time)
Parameter not being used at this time.
FBMIXTIME
Time constant for combined (mixed) feedback.
Parameter valid for linear and rotary axes and spindles.
Parameter valid for a Sercos drive.
Possible values: From 0 to 3200.0 ms.
Default value: 0.
Associated variable: (V.)[ch].MPA.FBMIXTIME.xn
Parameter included in the SERCOSDATA table.
This parameter may be used to set the time constant to be used when combining feedbacks;
i.e. it sets the delay between the coordinates entered in the position loop of the rotary encoder
and that of the linear encoder. The CNC takes this parameter into account only when using
external or einternal feedback.
If the parameter is set to a value other than ·0·, the combined feedback is enabled; if set to
·0·, only the external feedback is enabled. When changing this parameter, the parameter
validation will force resetting, initializing, the Sercos ring.
On machines that have a lot of backlash and use external feedback to obtain greater
accuracy may suffer some instability. This kind of machines, with internal feedback, run
smoothly, but they may loose accuracy; using external feedback on the other hand, the
machine is more accurate but it may run more abruptly. The combination of the two feedbacks
achieves the desired result of accuracy and smoothness.
The CNC uses the combined feedback to calculate the velocity command, but it uses the
external (direct) feedback to calculate the compensations, circularity test, etc.
This parameter requires a drive version V6.13 or newer.
i