3DM580 Digital Stepping Driver Manual V1.1
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9
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The current automatically reduced to 50% of the selected dynamic current one second after the last
pulse. Theoretically, this will reduce motor heating to 25% (due to P=I
2
*R) of the original value. If
the application needs a different standstill current, please contact Leadshine.
8. Wiring Notes
In order to improve anti-interference performance of the driver, it is recommended to use
twisted pair shield cable.
To prevent noise incurred in PUL/DIR signal, pulse/direction signal wires and motor wires
should not be tied up together. It is better to separate them by at least 10 cm, otherwise the
disturbing signals generated by motor will easily disturb pulse direction signals, causing
motor position error, system instability and other failures.
If a power supply serves several drivers, separately connecting the drivers is recommended
instead of daisy-chaining.
It is prohibited to pull and plug connector P2 while the driver is powered ON, because there
is high current flowing through motor coils (even when motor is at standstill). Pulling or
plugging connector P2 with power on will cause extremely high back-EMF voltage surge,
which may damage the driver.
9. Typical Connection
A complete stepping system should include stepping motor, stepping driver, power supply and
controller (pulse generator). A typical connection is shown as figure 9.
Figure 9: Typical connection
