JKDM860H Stepper Motor Driver

Input voltage

24~80VAC/24~110VDC

Output current

2.4~7.2A (PEAK)

Pulse frequency

0~100KHz

MicroSteps

16 MicroSteps

Using environment

-5~50℃,avoiddust,high teperatureand corrosive gas

Storage environment

-20~+80℃，avoid direct sunlight

Symbol

Name

Remark

A+

Phase A+

/

A-

Phase A-

/

B+

Phase B+

/

B-

Phase B-

/

AC

AC power input

/

AC

AC power input

/

Symbol

Name

Remark

PUL+

Pulse signal +

/

PUL-

Pulse signal -

/

DIR+

Direction signal+

/

DIR-

Direction signal-

/

ENA+

Enable signal +

Only connected when used

ENA-

Enable signal -

Only connected when used

1) The reliable operating temperature of the driver is usually within 66 °C, and the motor operating temperature is within 85 °C;

2) It is recommended to use the automatic semi-flow mode when using the motor. When the motor stops, the current is automatically reduced by half to reduce the heat of the motor and the drive;

3）Install the drive with vertical side mounting, so that the heat dissipating teeth form a strong air convection; if necessary, install a fan near the drive to force heat dissipation to ensure that the drive works within a reliable operating temperature range.

SW1

ON

OFF

ON

OFF

ON

OFF

ON

OFF

SW2

ON

ON

OFF

OFF

ON

ON

OFF

OFF

SW3

ON

ON

ON

ON

OFF

OFF

OFF

OFF

PEAK(A)

2.40A

3.08A

3.77A

4.45A

5.14A

5.83A

6.52A

7.20A

RMS(A)

2.00A

2.57A

3.14A

3.71A

4.28A

4.86A

5.43A

6.00A

SW4: The quiescent current can be set by the SW4 dial switch.OFF means that the quiescent current is set to half of the dynamic current. ON means that the quiescent current is the same as the dynamic current.

Pulse

400

800

1600

3200

6400

12800

25600

51200

1000

2000

SW5

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

SW6

ON

ON

OFF

OFF

ON

ON

OFF

OFF

ON

ON

SW7

ON

ON

ON

ON

OFF

OFF

OFF

OFF

ON

ON

SW8

ON

ON

ON

ON

ON

ON

ON

ON

OFF

OFF

Pulse

4000

5000

8000

10000

20000

40000

4000

5000

8000

10000

SW5

ON

OFF

ON

OFF

ON

OFF

ON

OFF

ON

OFF

SW6

OFF

OFF

ON

ON

OFF

OFF

OFF

OFF

ON

ON

SW7

ON

ON

OFF

OFF

OFF

OFF

ON

ON

OFF

OFF

SW8

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

OFF

1) The larger the actual current of the motor, the greater the output torque, but the more copper loss (P=I²R) of the motor, the more heat the motor generates;

2) The higher the supply voltage of the driver, the higher the high-speed torque of the motor;

3) It can be seen from the moment frequency characteristic diagram of the stepping motor that the high speed is smaller than the medium and low speed torque.

1) In order to prevent the driver from being disturbed, it is recommended to use the shieldedcable for the control signal, and the shield layer is shorted to the ground wire. Unless otherwise specified, the shielded cable of the control signal cable is grounded at one end: theupper end of the shielded wire is grounded, and the shielded wire The drive is suspended at one end. Only the grounding at the same point is allowed in the same machine. If it is not a real grounding wire, the interference may be serious. At this time, the shielding layer is not connected.

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 provided for multiple drives, parallel connections should be made at the power supply. It is not allowed to connect one to the other and then to another chain.

4) It is forbidden to electrify the P2 terminal of the driver. 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 strictly forbidden to add the tin to the terminal after adding the tin, otherwise the terminal may be overheated due to the contact resistance becoming larger.

For the same motor, the larger the current setting value, the larger the motor output torque,but the heat of the motor and the driver is also more serious when the current is large. The magnitude of the specific heat generation is not only related to the current set value, but also to the type of exercise and the dwell time. The following setting method uses the rated current value of the stepping motor as a reference, but the optimum value in practical applications should be adjusted based on this. In principle, if the temperature is very low (<40 °C), the current setting value can be appropriately increased to increase the motor output power (torque and high-speed response).

1) Four-wire motor: The output current is set to be equal to or slightly smaller than the rated current of the motor;

2) Six-wire motor high torque mode: the output current is set to 50% of the rated current of the motor unipolar connection;

3) Six-wire motor high-speed mode: the output current is set to 99% of the rated current of the motor unipolar connection;

4) Eight-wire motor series connection method: the output current can be set to 70% of the rated current of the motor unipolar connection;

5) Eight-wire motor and connection method: The output current can be set to 140% of the rated current of the motor unipolar connection.

The DM860 can be used to drive 4, 6 and 8 wire two-phase, four-phase hybrid stepping motors with a step angle of 1.8 degrees and 0.9 degrees. When selecting a motor, it is mainly determined by the torque and rated current of the motor. The torque is mainly determined by the size of the motor. The large- sized motor has a large torque; the current is mainly related to the inductance, and the small-inductance motor has high-speed performance, but the current is large.

Determine the load torque, the ratio of the working speed range:

T motor = C (Jε + T load)

J: Moment of inertia of the load

ε: Maximum angular acceleration of the load

C: Safety factor, recommended value 1.2-1.4

T load: maximum load torque, including effective load, friction, transmission efficiency and other resistance torque

The motor does not turn:

■Check if the power supply circuit is powered normally

Whether the signal current is increased to 7-16mA

■Whether the subdivision is selected

■Is the current selected?

Motor steering error:

■The motor line phase sequence is wrong, you need to exchange any two wires.

■The motor line has an open circuit, check and connect

The alarm indicator lights up:

■Whether the motor line is connected incorrectly

Is there any overvoltage and undervoltage?

■Motor or drive damage

Inaccurate location:

■Signal interference

■The shield is not connected or not connected.

■The motor line has an open circuit, check and connect

■Subdivision error

■The current is too small

Stall when the motor accelerates:

Short acceleration time

■The motor torque is too small

■The voltage is low or the current is too small