maxon motor
4-Q-DC Servoamplifier ADS 50/5
Operating Instructions
4
Operating Instructions
4.1
Determine power supply requirements
You may make use of any available power supply, as long as it meets the mi-
nimal requirements spelled out below.
During set up and adjustment phases, we recommend separating the motor
mechanically from the machine to prevent damage due to uncontrolled motion.
Power supply requirements
Output voltage
VCC min. 12 VDC; max. 50 VDC
Ripple
< 5 %
Output current
depending on load, continuous 5 A
(short-time 10 A)
The required voltage can be calculated as follows:
Known values
Ö
Operating torque M
B
[mNm]
Ö
Operating speed n
B
[rpm]
Ö
Nominal motor voltage U
N
[Volt]
Ö
Motor no-load speed at U
N
, n
0
[rpm]
Ö
Speed/torque gradient of the motor
∆
n/
∆
M [rpm/mNm]
Sought values
Ö
Supply voltage V
CC
[Volt]
Solution
[ ]
V
M
M
n
n
n
U
V
B
B
N
CC
2
9
.
0
1
0
+
⋅
⎟
⎠
⎞
⎜
⎝
⎛
⋅
∆
∆
+
⋅
=
Choose a power supply capable of supplying this calculated voltage under load.
The formula takes into account a max. PWM cycle of 90 % and a 2 volt max.
voltage drop.
Consider
The power supply must be able to buffer the back-fed energy from brake opera-
tion e.g. in a condenser. With electronically stabilized power supply units it is to
ensure, that the overcurrent protection responds in no operating condition.
4.2
Function of the potentiometers
Potentiometer
Function
Turn to the
left
right
P1
IxR IxR
compensation
weak
compensation
strong
compensation
P2
Offset
Adjustment n = 0 / I = 0
at set value 0 V
motor turns
CCW
motor turns
CW
P3
n
max
max. speed
at 10 V set value
speed
slower
speed
faster
P4
I
max
current limit
lower
min. 0.5 A
higher
max. 10 A
P5
gain amplification
lower higher
July 2009 Edition / Doc. No. 538837-07 / Subject to change
maxon motor control
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