maxon motor
Operating Instructions
1-Q-EC Amplifier DEC 50/5
4.2 Adjusting the potentiometers
4.2.1 Pre-adjustment
With the pre-adjustment, the potentiometers are set in a preferred position.
DEC units in the original packing are already pre-set.
P
1
S
p
e
e
d
1
P
2
S
p
e
e
d
2
/
R
a
m
p
P
3
I
m
a
x
Pre-adjustment of potentiometers
P1
Speed 1
50 %
P2
Speed 2 / Ramp
50 %
P3
I
max
50 %
Note
Left end stop of potentiometers:
Minimum value
Right end stop of potentiometers:
Maximum value
4.2.2 Adjustment
Digital speed control
1.
Depending on operating mode selected, predetermine set value so that
required speed is reached. If necessary, adjust max. speed with switch
S5
and
S6
(see
chapter 7, “Speed Ranges”
).
2.
Adjust potentiometer
P3 I
max
to required limiting value.
Maximum current in the 0 … 10 A range can be adjusted in linear fashion
with potentiometer
P3
.
3.
Adjust switch
S2 gain
to required amplification
(
S2
OFF: gain high,
S2
ON: gain low)
Important:
If the motor is unsteady, vibrates or makes noises, the se-
lected amplification is too high. Switch
S2
must be set at ON.
Digital current control
1.
Adjust potentiometer
P1 Speed 1
to required speed limit. Maximum
speed in the 500 ... 25 000 rpm range (motor with 1 pole pair) can be
adjusted in linear fashion with potentiometer
P1
, and is independent of
the position of the switches
S5
and
S6
(see
chapter 7, “Speed Ranges”
).
2.
Predetermine set value at “Speed” input so that required torque is
reached.
Note
A set value in the 0 ... 5 V range at the “Speed” input is equal to a current
adjustment range of approx. 0 … 5 A.
Band width of current control: approx. 15 Hz
Digital open loop
speed control
1.
Predetermine set value at “Speed” input so that required speed is
reached. The set value range of 0 ... +5 V is equal to a motor voltage
range of 0 V ... V
CC
. The maximum speed is determined by the supply
voltage and the speed constant of the motor and is independent of the
position of the switches
S5
and
S6
.
2.
Adjust potentiometer
P3 I
max
to required limiting value.
Maximum current in the 0 … 10 A range can be adjusted in linear fashion
with potentiometer
P3
.
October 2008 Edition / Doc.No. 544910-06 / subject to change
maxon motor control
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