To convert the control signals supplied by the ELS into motor current, we need a motor driv-
er or motor output stage. These are small electronic devices that generate suitable signals to
move the motor.
Most types have step and direction inputs, 4 output terminals for the
motor connection and +VDC and GND connections for the supply volt
-
age. Very often used are the drivers from a Chinese company called
Leadshine. The company manufactures many different drivers, some
of which are ideal for driving small to large stepper motors.
The output stages allow the operation with microsteps and also offer
a way to limit the current. There are digital and analog power amplifi
-
ers from Leadshine. The analog drivers are older, but have the same
precision as the newer digital ones. The motors run a little rough-
er because the digital drivers offer better signal processing and thus
control the motors even more efficiently. We therefore recommend
the use of digital motor drivers.
Connection of the drivers
All drivers have a connection for a power supply, which must be able to supply the required
voltage and sufficient current for the motors. Usually there are 24, 36 or 48Volt, with large driv
-
ers it is also possible to drive directly with 230V mains voltage. Refer to the driver manual for
more information.
Step and hybrid servo drivers also have connections for the motor coils.
For the control signals there are inputs for step, direction and enable. There are also RJ45-adapt
-
ers that can be used to connect these signals via an Ethernet patch cable.
Hybrid servo drivers also have a connection for the motor encoder, which is indispensable for
closed-loop feedback. You will need to connect that cable with an appropriate extension cable.
Examples for using RJ45-adapters on Leadshine Motordrivers
19
MOTOR-DRIVERS
Содержание ELS 4 Basic
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