Service Guide MINI SPEED
Service Guide MINI SPEED
Personality
header
Adjustement
Zone
Personality
header
We recommend to not exceed with the dynamic gain of the velocity loop
(kv potentiometer) for avoid control instability.
It is also important the ratio between VDC power supply and V motor for
the stability.
Specially for armature feedback avoid reports VDC/V motor greater 1.5.
Example: MS 140 armature feedback,supplied 130v with voltage motor
at max speed 40 v.
130 = 3,25
NO !
40
OFFSET SPEED
CALIBRATION
The amplifier is provided with the offset speed calibration
performed for tacho feedback.
If necessary,retouch through bil potentiometer for correct
offset.(until +/-200 mv can be compensated on analogue
input).When we have zero input reference,turn potentiometer
until servomotor is stopped.
When you use amplifier in armature feedback please proceed
with the offset calibration as follows:
- Insert RA and RCA resistance calculated (see page 27).
- Insert a voltmeter between Im test point and zero (see page
6) and turn bil trimmer to reach zero voltage respect to tacho
mode ,bil trimmer has to be turned more times stop trimmer
when motor shaft stops.But no loads are to be applied during
this calibration.
The amplifier is provided with standard calibration.
It correponds at rated current of the size,Rin not mounted.
For reduce itself,insert RIN resistance between 4-11 pin of
the personality header.
Typical values are reported below.
Is not suggest to use a lower value than the reported one of
820 ohm.
RATED CURRENT
CALIBRATION
RATED CURRENT
TIME
INTERVENTION
Minispeed amplifiers provide peak current for 2 sec.
If nominal current is lower then the current of
amplifier,intervention time is lower than 2 sec on the same
ratio.
2.2 Personalization
All the amplifier adjustments are present
on the 3.005.4 Pc board the adjustment
zone.
The amplifier is provided with 7+7 pin
header where we mount personality
components.
If an amplifier is replaced,it is important
to verify that the new amplifier is
calibrated as the one removed.
This is easily accomplished by simply
installing the personality header from the
removed amplifier into the new one and
verify the solder bridges.
Dynamic adjustment
Solder side
Adjustment on the personality header
For calculate the
correct value
see page 26
RDT RESISTANCE pin 1 - 14
If we insert this resistance,we adapt KE
tachogenerator costant with input amplifier costant.
If the KE costant is small,we can bridge this
resistance.(see velocity calibration chapter 4.3)
The same also if a very low speed is requested.
Taglia/
RIN(Kohm)
-
18
10
8.2
5.6
4.7
3.9
3.3 2.7
2.2
1.8 1.5 1.2
1
0.82
02/04
2
1.9
1.8
1.7
1.6
1.55
1.4
1.3
1.2
1.15
1.1
1
0.9
0.8
1.7
04/08
4
3.7
3.5
3.4
3.2
3.1
3
2.8
2.7
2.5
2.3
2.2
2
1.9
1.7
08/16
8
7.5
7.2
6.8
6.5
6.2
6
5.7
5.4
5
4.6
4.4
4
3.7
3.3
10/20
10
9.3
9
8.5
8
7.7
7.4
7.1
6.7
6.2
5.8
5.4
5
4.6
4.2
14/28
14
13
12.3
12
11.2
11
10.5
10
9.2
8.8
8.1
7.5
7
6.5
6
20/40
20
18.8
18
17.4 16.2 15.8
15
14.5 13.5 12.7 11.9
11
10.2 9.4
8.6
25/50
25
22
21
20.5
19
18.5
17
16
15
14
13
12
11
10
9.5
0.7