maxon motor
4-Q-EC Servoamplifier DES 70/10
Operating Instructions
4.3 Adjustment of the potentiometer
4.3.1 Pre-adjustment
With the pre-adjustment, the potentiometers are set in a preferred position.
DES units in the original packing are preset.
Pre-adjustment potentiometers
P1
n
max
30 %
1)
P2
Offset 50
%
P3
I
max
50 %
2)
P4
gain
30 %
1) 30 % are equivalent to n
max
= approx 7500 rpm
2) 50 % are equivalent to I
cont
= approx. 5 A, I
max
= approx. 15 A
4.3.2 Adjustment
Digital speed control
(see also 5.1.6)
1.
Give the max. set value (e.g. 10 V) and turn potentiometer
P1 n
max
until
the required speed is achieved.
2.
Set
potentiometer
P3 I
max
at the required limiting value.
Important:
The limiting value I
cont
(=
1
/
3
I
max
) should be below the nominal
current (max. continuous current) as shown on the motor data sheet.
3.
Increase potentiometer
P4 gain
slowly until amplification is set suffi-
ciently high.
Important: If the motor vibrates or becomes loud, the selected amplifica-
tion is too high and the potentiometer
P4
must be readjusted until the
instability of the drive’s closed loop ceases under all loads.
4.
Adjust set value to zero, e.g. by short-circuiting the set value. Then, with
the potentiometer
P2 Offset
, set the motor speed to zero.
Note: Step 4 is not necessary with external set value potentiometer.
Digital current control
(see also 5.1.6)
1.
Set potentiometer
P3 I
max
at the required limiting value.
Important:
The limiting value I
cont
(=
1
/
3
I
max
) should be below the nominal
current (max. continuous current) as shown on the motor data sheet.
2.
Adjust set value to zero, e.g. by short-circuiting the set value. Then, with
the potentiometer
P2 Offset
, set the motor speed to zero.
Note
Configured as a digital current controller,
P1 n
max
und
P4 gain
are not activated.
6
maxon motor control
April 2006 Edition / Subject to change
