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DM542 Fully Digital Stepper Drive Manual
2）The pulse and direction signal lines and the motor lines are not allowed to be bundled side by
side, preferably separated by at least 10 cm. Otherwise, the motor noise easily interferes with the
pulse direction signal, causing the motor to be inaccurately positioned, and the system is
unstable.
3） If one power supply is used for multiple drives, parallel connections should be made at the power
supply. It is not allowed to go to one chain and then to another chain.
4）It is forbidden to plug and unplug the driver's strong P2 terminal. When the charged motor stops,
there is still a large current flowing through the coil. Pulling the P2 terminal will cause a huge
moment to induce the electromotive force to burn the driver.
5）It is forbidden to add the tin wire to the terminal after adding the tin wire. Otherwise, the
terminal may be damaged due to overheating of the contact resistance.
6）The wiring heads should not be exposed outside the terminals to prevent accidental short circuits
and damage the drive.
四、Current, subdivision DIP switch setting and parameter auto-tuning
The DM542 driver uses an eight-position dial switch to set subdivision accuracy, dynamic current,
static half-flow, and auto-tuning of motor parameters and internal tuning parameters. The detailed
description is as follows:
1．Current Setting
1）Dynamic Current Setting
Peak Current RMS Current
SW1
Default[1.0A,PK]
on
1.46A
1.04A
off
1.91A
1.36A
on
2.37A
1.69A
off
2.84A
2.03A
on
3.31A
2.36A
off
3.76A
2.69A
on
5.00A
3.50A
off
7
SW2
SW3
on
on
on
on
off
on
off
on
on
off
on
off
off
off
off
off
DM542 Fully Digital Stepper Drive Manual
When SW1, SW2, and SW3 are set to off off, the required current can be set by PC software, the
maximum value is 4.2A, and the resolution is 0.1A. If not set, the default current is 1.0A
2） Standstill Current Setting
SW4 is used for this purpose. OFF meaning that the standstill current is set to be half of the
selected dynamic current, and ON meaning that standstill current is set to be the same as the
selected dynamic current.
The current automatically reduced to 50% of the selected dynamic current one second after the last
pulse. Theoretically, this will reduce motor heating to 36% (due to P=I2*R) of the original value. If
the application needs a different standstill current, please contact Leadshine.
2. Microstep Resolution Selection
Steps/rev.
SW5
SW6
Default
on
on
400
off
on
800
on
off
1600
off
off
3200
on
on
6400
off
on
12800
on
off
25600
off
off
1000
on
on
2000
off
on
4000
on
off
5000
off
off
8000
on
on
10000
off
on
20000
on
off
25000
off
off
SW7
SW8
on
on
on
on
on
on
on
on
off
on
off
on
off
on
off
on
on
off
on
off
on
off
on
off
off
off
off
off
off
off
off
off
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