Examples Of Driver Interface For Step-Servo Motor; Brief - RD RDC6445GZ User Manual

Shenzhen Reader Technology Co., Ltd

6 Examples of Driver Interface for Step-servo Motor

6.1 Brief

The input signal end of step-servo motor driver employs the light-coupled isolation
technology. For the step-by-step impulse signal, some isolate the side OC diode from
cutoff to conduction (e.g. the valid falling edge of pulse signal inputted from the diode
minus end) and some do so from conduction to cutoff (e.g. the valid rising edge of pulse
signal inputted from the diode minus end).
When it is indicated whether the pulse signal of motor driver is the valid rising
edge or the valid falling edge, it will be subject to the pulse signal inputted from the
minus end of side OC diode.
Some input signals of motor driver are independent and some are internally of
common anode, so some have 4 external leading-out wires and some 3 wires (only the
pulse and directional signals are counted) as shown in Figure 6.1-1 and 6.1-2.
RDC644XG Controller has four groups of 3-wires motion driver interface, each
interface has one direction signal, one pulse signal, and one 5V positive output, the
direction signal and the pulse signal are all OC output.
RDC644XG controller must be common anode with the motor driver. The
polarity of the direction signal can be changed in the factory parameters, and the
valid edge of the pulse signal can also be changed.
PU+
PU-
DR+
DR-
Figure: 6.1-1 Four Inputs, Independent
Input Signal of Driver
+5V
PU
DR
Figure: 6.1-2 Three Inputs, Common-anode
Input Signal of Driver
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