DM422C Digital Stepping Driver Manual V1.0
Tel: +000 0000-00000000
23
Figure 24: Finish tuning and save setting to the Drive
Notes:
However, if the user does not want to tune the current loop after changing a different stepping motor,
then
Motor self-test and parameter auto-setup
technology of the DM422C can replace manual
tuning the Drive with
ProTuner
. Just changes SW4 two times in 1 second, and then the Drive will
auto-identify the new motor and auto-configure related control parameters for optimum responses.
Recommend
use this function after changing the driven motor.
SystemConfig
:
In
SystemConfig
window, the user can configure Peak Current, Microstep, Command Type, Active
Edge, and eliminate motor resonance. A built-in pulse generator can be used for test during tuning.
See Picture 25.
PeakCur: Peak Current
. The value is the peak current to the selected motor and can be set from 0.1
to 3.2 A. The user can set the peak current with
ProTuner
or DIP switches, see more information
about setting output current of the Drive in section 5
“
Connecting the Motor
”
and section 7
“
Selecting Microstep Resolution and Drive Output Current
”
.
MicroStep: Microstep Resolution
. The value is Drive
’
s microstep resolution setting and can be set
from 1 to 512. The user can set the microstep with
ProTuner
or DIP switches, See more information
about setting output current of the Drive in section 7
“
Selecting Microstep Resolution and Drive
Output Current
”
.
StepAngle: Step Angle
. The Drive will auto detect the
Step Angle
of the driven motor.
DM422C Digital Stepping Driver Manual V1.0
Tel: +000 0000-00000000
24
CommandType: Command Type
of control signal, including PUL/DIR and CW/CCW. Set this
parameter according to
Command Type
of motion controller.
ActiveEdge: Active Edge.
The user can set the triggered edge of pulse command signal in this panel.
When the Drive works in CW/CCW mode, no matter what level is at fixed level terminal, the Drive
can works properly.
Anti-Resonance Introduction
Step motors are highly resonant, which results in vibration and ringing. The ringing utilizes a large
fraction of the motor's available torque
–
thereby wasting performance. Furthermore, at mid-range
velocities, the resonance can become so severe that the motor looses synchronization and stalls. The
DM422C Drive provides robust anti-resonance control to stop the vibrations and maintain equilibrium.
This feature requires that the Drive be configured with respect to the total inertia in the system. If set
improperly, the effectiveness of the feature may be diminished.
The user can invoke or disable the feature by setting
Amp
and
Phase
values in
SystemConfig
window.
Amp
and
Phase
values all zero is to disable the feature, otherwise is to invoke the feature. It
should be enabled unless the system configuration either does not need it or cannot tolerate it. A
system with loose couplings or viscous loading generally does not need this feature. If a system has
compliant (springy) coupling and is absent appreciably viscosity, it may not respond well to the active,
anti-resonant loop in the drive. The anti-resonant feature is not designed to damp such a 4
th
order
system. If the application of anti-resonance results in degradation or instability, it should be disabled.
1
st
ResonanceArea: Parameters for 1
st
resonance area.
Usually between 0.6rps and 1.2rps.
Amp1
is Amplitude adjustment for 1
st
resonance area.
Phase1
is Phase adjustment for 1
st
resonance area. The user can enter a value directly in the text box
or move the slider bar back and forth to get an optimum value.
LowerLimit
is the
Lower Limit
of the 1
st
resonance area, and the user can capture this value when
finds it during move the slider bar of internal pulse generator.
UpperLimit
is the
Upper Limit
of the 1
st
resonance area. Default
Amp1
and
Phase1
values are zero.
2
nd
ResonanceArea: Parameters for 2
nd
resonance area.
Usually between 1.2rps and 2.4rps.
Default
Amp2
and
Phase2
values are zero.
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Telefon: +49 7832 / 9744670
