Contents

9

Microstep Resolution Selection

When it’s not in software configured mode, microstep resolution is set by SW5, 6, 7, 8 of the DIP

switch as shown in the following table:

SW5

SW6

SW7

SW8

Micro

step

Pulse/rev

SW5

SW6

SW7

SW8

Micro

step

Pulse/rev

ON

ON

ON

ON

1

400

ON

ON

ON

OFF

5

1000

OFF

ON

ON

ON

2

800

OFF

ON

ON

OFF

10

2000

ON

OFF

ON

ON

4

1600

ON

OFF

ON

OFF

20

4000

OFF

OFF

ON

ON

8

3200

OFF

OFF

ON

OFF

25

5000

ON

ON

OFF

ON

16

6400

ON

ON

OFF

OFF

40

8000

OFF

ON

OFF

ON

32

12800

OFF

ON

OFF

OFF

50

10000

ON

OFF

OFF

ON

64

25600

ON

OFF

OFF

OFF

100

20000

OFF

OFF

OFF

ON

128

51200

OFF

OFF

OFF

OFF

125

25000

Current Settings

For a given motor, higher driver current will make the motor to output more torque, but at the same

time causes more heating in the motor and driver. Therefore, output current is generally set to be such

that the motor will not overheat for long time operation. Since parallel and serial connections of

motor coils will significantly change resulting inductance and resistance, it is therefore important to

set driver output current depending on motor phase current, motor leads and connection methods.

Phase current rating supplied by motor manufacturer is important in selecting driver current, however

the selection also depends on leads and connections.

Contents

10

When it’s not in software configured mode, the first three bits (SW1, 2, 3) of the DIP switch are used

to set the dynamic current. Select a setting closest to your motor’s required current.

Dynamic current setting

SW1

SW2

SW3

Peak

RMS

SW1

SW2

SW3

Peak

RMS

O N

O N

O N

1.0A

0.71 A

O N

O N

O F F

3.0A

2.14 A

OFF

ON

ON

1.5A

1.07 A

O F F

O N

O F F

3.5A

2.50 A

O N

O F F

O N

2.0A

1.43 A

O N

O F F

O F F

4.0A

2.86 A

OFF

OFF

ON

2.5A

1.78 A

O F F

O F F

O F F

4.5A

3.21 A

current setting, particularly under high speed condition.

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 60% of the selected dynamic current one second after the last

the application needs a different standstill current, please contact MotionKing.

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.