JVL MIS23 Series User Manual

268 JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS23x, 34x, 43x
12.2 Step motor controllers (SMCxx)
Step Motor Controller SMC75 is a mini-step driver with fixed 1600 pulses/rev., which
has been designed for driving step motors with phase currents of up to 3 Amp/phase
(RMS).
The Controller SMC75 is available in 2 different versions for various applications. It is
built into the QuickStep Integrated Step Motors, but for OEM and low-cost applications
it can be delivered as a PCB or in its own housing with M12 connectors. For easy mount
-
ing and service, the version with M12 connectors is recommended. A version with cable
glands can be used for high volume and low cost applications.
Other combinations and features are also possible for OEM use. See “Connector over-
view for the MIS23x” on page 33. for further information.
The “box” version which is built into a black aluminium casing provides a very robust
construction that is insensitive to mechanical vibration and electrical noise.
The advantage of using a ministep driver instead of a conventional full-step or half-step
driver is that mechanical resonance problems are significantly minimised. Resonance
most often occurs at slow motor speeds and results either in loss of motor torque or the
appearance of significant harmonics. The principle of the ministep technique is to drive
the motor using a sinusoidal current in the interval between 2 physical full steps. This re
-
duces the step velocity between each step and thus damps any resonance significantly.
Both 2-phase and 4-phase step motors can be connected to the Controller, which utilises
the “Bipolar Chopper” principle of operation, thus giving optimum motor performance.
Order no. PCB BOX CAN-
open
IO RS485 M12 Cable
Glands
SMC75A1 X 8 1
SMC75A1AC X X 8 1
SMC75A1M3 X 4 2 X
SMC75A1M5 X 8 1 X
SMC75A1M6 X X 8 1 X
SMC75A1W0 X 8 1 X
50
-50
0
150
-150
100
-100
2
3
1
4
Pos it i on
(Full steps)
Posi t i on
(Full steps)
Mi ni st ep
Full step
Current (%)
Comparison between ministep and full step
Resonance during full step operation
6
5
2
3
1
0
4
Tim
e
TT2158GB
Overshoot

JVL MIS23 Series Specifications

General

Brand	JVL
Model	MIS23 Series
Category	Engine
Language	English