264 JVL Industri Elektronik A/S - User Manual - Integrated Stepper Motors MIS23x, 34x, 43x
12.1 Step motor drivers (SMDxx)
The internal electronics of the QuickStep series of Step-
per motors is available as stand alone boards to be used
with any stepper motor which require a motor current
in a reasonable range within what the board can handle.
The 2 available boards available are the SMD73 and
SMD74 which are both non-programmable drivers for
stepper motors. The 2 drivers have the following main
specifications:
• SMD73 - 18-28VDC supply motor current 0-
3.0ARMS per motor phase.
• SMD74 - 18-48VDC supply motor current 0-
3.0ARMS per motor phase. For applications with
higher torque performance at higher speeds.
In the past decade, pulse/direction interfaces have be-
come increasingly popular for the control of step and
servo motors. This is due to the fact that pulse/direction
signals provide a simple and reliable interface which is
100% digital, precise, and offers immediate response.
When a pulse is sent, the motor instantaneously moves
1 step forward.
For example, if the motor has a resolution of 200 steps/
revolution, it will move 1.8 degrees. By changing the
frequency of the applied pulse signal, it is possible to ac
-
celerate the motor.
By counting the number of pulses, the motor’s po-
sition can be determined without any error what-
soever. The direction input is used to determine
the motor’s direction of rotation. JVL’s QuickStep
motors with pulse/direction interface offer the fol
-
lowing advantages:
• Very simple technology that is easy to under-
stand and apply.
• High stability and low cost because the tech-
nology is simple with few components.
• Only one cable with 8 wires is required, so
cabling costs are a minimum.
• No controller in the control cabinet.
• All positioning and control is performed by the
PLC, so there is no duplication of software or
cabling.
• Option: Build into housing: IP67 protection
class for use in demanding environments.
• Thermally protected against current overload
and short-circuit.
• Reacts instantaneously. The motor starts within
microseconds.
• 5V or 24V PNP/NPN inputs ensure compatibil-
ity with any controller.
• Step resolution of 200, 400, 800, 1000 or 1600
pulses/revolution.
• SMD73 family: Supply voltage 18-28 VDC.
• SMD74 family: Supply voltage 18-48VDC.
For special versions please contact your nearest JVL
distributor.
For further information on the pulse/direction
driver see also SMD73/74 Data-sheet and
Technical Note.
SMD73
74
Step motor driver
SMD73 / 74
Bottom side
MST001 Motor
mounted with SMD73
TT2324-01GB
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