maxon motor
Operating Instructions
1-Q-EC Amplifier DEC 50/5
5.1.3 “Direction”
When the level changes, the motor slows down in an uncontrolled fashion (as
windings are short-circuited, see also
chapter 5.1.5, “/Brake” function
) and
accelerates in the opposite direction, until the nominal speed is reached
again. A speed ramp is only used during acceleration.
The “Direction” input is protected against overvoltage.
Input voltage range
0 ... +5 V
Input
impedance
33 k
Ω
pull-up resistor at +5 V
Continuous overvoltage protection
-50 ... +50 V
Delay time
approx. 12 ms
Clockwise (CW)
Input open or
input voltage > 2.4 V
Counter-clockwise (CCW)
Set input to Gnd or
input voltage < 0.8 V
If the direction is changed with a rotating motor shaft, the limitations described
in
chapter 5.1.5, "/Brake" function
must be observed, or the amplifier may be
damaged.
5.1.4 Ramp
function
The ramp function enables the motor speed to have a controlled run-up when it
starts up and if set values change.
Acceleration time is adjusted at the potentiometer
P2
Ramp and relates to the
maximum speed in the currently chosen speed range (see
chapter 7, “Speed
Ranges”
).
adjustable acceleration time
on the potentiometer P2 Ramp
approx. 20 ms ... approx. 10 s
Left end stop
approx. 20 ms
Right end stop
approx. 10 s
Pitch
linear
approx. 1.0 s/pitch
Example:
Potentiometer
P2
Ramp:
40 %
Change in “Speed” set value:
0 V to 3 V
Acceleration time to rated speed
s
approx
s
V
V
time
on
Accelerati
4
.
2
.
10
%
40
5
3
=
⋅
⋅
=
Note
The minimum acceleration time can only be reached if the gain is high and the
drive sufficiently dynamic.
October 2008 Edition / Doc.No. 544910-06 / subject to change
maxon motor control
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