Service Guide MINI SPEED
Service Guide MINI SPEED
CKI and RKI
C DER
RKV - CKV
GAIN
4.3 Adjustment
MAX TACHOGENERATOR
FEEDBACK SIGNAL
NOTES:
for adjustment we need the following instruments:
- Rpm-counter for measure the motor speed , or digital
voltmeter for measure tacho signal.
- Potentiometers 5k until 47 kohm.
Axor advise to use a potentiometer when there is not a
CNC.
A pot. allows also to reach max speed during tests without
too fast accelerations.
ATTENTION:If a cnc is used and the cnc positive direction
is inverted respect to the motor positive rotation, we must
invert both motor and tacho cables. If not made the cnc
when started will give axis position error after started at full
speed . Moving manually the machine it is possible to verify
that both positive sense(motor and cn) will be on same
direction.
Insert RDT resistance between pin 1-14 on the personality header.It can be calculated
with the following formula.
RDT value express in k (1/4 w)
Kdt tacho generator costant (express in v/1000rpm)
n max speed express in RPM
Vref max voltage reference
RDT (Kohm) = Kdt x n x 9,7 _ 8
1000 x Vref
We will use RDT= 22 Kohm.
If the result from formula is zero make a bridge. If the result from formula is negative you
must change the tachogenerator with another with an higher kdt.
RDT = 10 x 3000 x 9,7 _ 8 = 21,1 Kohm
1000 x 10
Kdt =10
n =2500 RPM
Vref=10
Dyinamic response calibration
When complete information is supplied to AXOR, the
amplifiers are calibrated from the factory for nominal
motor performance.
Field calibration may be necessary to optimize motorʼs
performance for a particular applications ,replacing
internal costant.
For replacement we insert new value in
“ADJUSTMENT ZONE” opening solder bridges
expected.(see page 9)
Calibration for qualified
personnel
They describes respectively capacitor and resistance
of the current loop.
For replacement we must open the solder bridge
JP3.(disabilitation of standard costant)
It allows to increase the velocity loop derivative
costant.
New value may be composed by 2 capacitor.
We can insert these capacitors in the predisposed
space.The obtained capacitor value is the sum of the
two.
They describe respectively resistance and capacitor
of the velocity loop.
For replacement we must open the solder bridge JP4
.(disablilitation of standard costant)
It defines the velocity loop static gain.
We can insert new value by solder bridge JP5 opening
disabilitation of standard costant.
Summary of Contents for Minispeed MS 140
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