Question

Why is the DM860H stepper motor driver not working? What are the common fault causes and troubleshooting methods of stepper motor drives?

Answer 1

DMA860H stepper motor driver can drive 4, 6, 8 wire two-phase stepper motor; Voltage input range: 18-80Vac; Maximum current: 7.2A, resolution: 0.1A, subdivision range: 400~51200, signal input: differential/single-ended, pulse/directional or double pulse, pulse response frequency: 200KHZ.

For this friend, why is the DM860H stepper motor driver not working?

Below I have made the following analysis for this problem "DMA860H drive instability causes":

First of all, it is necessary to determine the cause of the undervoltage.

Here's why:

First, the power supply problem. That is, the power supply voltage is too low, at this time, the power supply needs to be replaced, or devices such as voltage regulators are installed on the power supply;

Second, the hardware failure of the servo drive itself may be due to the failure of the detection loop, or other hardware failures, which need to be solved by professional maintenance engineers;

Third, the problem of harmonic interference, at this time, it is necessary to install a special filter at the servo drive input to solve it.

Answer 2

Quiescent current can be set with SW4 DIP switches, off means that the quiescent current is set to half of the dynamic current, and on means that the quiescent current is the same as the dynamic current. 

In general use, SW4 should be set to off, so that the heat generation of the motor and drive is reduced and the reliability is improved. 

After the pulse train stops, the current is automatically reduced to about half (60% of the actual value) in about 0.4 seconds, and the heat generation is theoretically reduced to 36%.

Answer 3

Common fault causes and troubleshooting methods of stepper motor drivers

Stepper motor driver is a very important component, but sometimes there are a variety of failures, many friends do not know how to troubleshoot and solve, the following by servo motor manufacturers for you to list some common stepper motor drive fault causes and solutions, hope to help you!

1. Stepper drive failure

Cause of failure: Electrostatic discharge due to poor working environment.

Solution: The PE in the electrical cabinet should be grounded. If the problem persists, the drive module may be damaged and the drive module needs to be replaced.

2. The positioning accuracy of the transmission system is unstable

Cause of failure: There is a problem with the mechanical components of the gearbox system, and the nut is not installed correctly, which will cause assembly stress on the moving parts.

Workaround: Reinstall mechanical components such as nuts.

3. The positioning accuracy of the reference point is too large

Cause of failure: The machine proximity switch or detection body is not installed correctly.

Elimination method: check the installed proximity switch; the gap between the machine tool proximity switch and the detection body; Or replace the proximity switch.

4. Incorrect return to reference point operation

Cause of failure: The machine tool uses a negative logic (NPN type) proximity switch.

Elimination method: replace the positive logic proximity switch (PNP type).

The above is the common fault causes and troubleshooting methods of stepper motor drivers, only by mastering the basic knowledge and principles can we better use stepper motors and bring convenience to our production and life.

Answer 4

The DMA860H driver adopts differential interface circuit, which can be applied to differential signals, single-ended common negative and common positive interfaces, and has a built-in high-speed photocoupler, allowing the reception of signals from long-line drivers, open-collector circuits and PNP output circuits. In the harsh environment, we recommend using a long-line driver circuit with strong anti-interference ability. Now taking the open collector and PNP outputs as examples, the interface circuit diagram is as follows:

The DMA860H driver uses differential interface circuitry for differential signaling

Note:

1. When VCC=5V in the connection method in the figure, there is no need for series resistance at the signal end; When VCC=12V, the signal terminal needs to be connected in series with a resistor of about 1K, R=1K/0.25W; When VCC=24V, the signal terminal needs to be connected in series with a resistor of about 2K, R=2K/0.25W.

DMA860H stepper motor driver mounting dimensions - The cause of DMA860H drive instability

2. The internal current limiting resistance of the driver is 270Ω

Answer 5

A stepper motor driver is an actuator that converts electrical impulses into angular displacement. 

DMA860H stepper motor driver manufacturers product

When the stepper driver receives a pulse signal, it drives the stepper motor to rotate a fixed angle (called "step angle") in the set direction, and its rotation is run step by step at a fixed angle. This drive model is DMA860H.

Answer 6

Line problems are generally reflected in old equipment, because the line is an easy problem to overlook, based on the signal and motor line are possible, first of all, a method of elimination.

China hybrid stepper motor manufacturer product display

1: Both stepper motors do not rotate. Consider the power circuit. Control the signal input circuit, because the motor wiring problem can basically be eliminated. (It would be much easier if only one could work).

2: The power supply problem is also relatively simple, cut off the power supply of a group of drives V+, V-, if the power supply power is not enough, there is basically no problem with one machine. Caused by general aging of the power supply.

3: The line problem is much more complicated. But it's also intuitive to see if there were occasional glitches before the problem occurred. It's that the machine is up and down. If so, it's 100% certain of the problem.

4: The signal problem is more complicated, but the probability of two pulses not being available is less, and if one pulse controls two drivers, such a problem is more common (however, few people use this way).

5: Emergency stop switch problem. If the emergency stop switch is broken, the motor will not move. I'm not a master. I can only roughly analyze the reasons. Because who changes the drive and motor, if not understood. Counterproductive. Hope that helps. I don't need to be paid. Because I'm not professional enough.

Answer 7

What is the reason why the stepper motor does not rotate?

There are many reasons why the stepper motor does not rotate, and it is necessary to quickly determine the cause and accurately repair it at the equipment application site to reduce the economic loss caused by the equipment shutdown.

There are 2 reasons why motors are caused in the field of application:

1. The problem of the motor, if there is a drive product of the same specification on the equipment in the application site, you can choose a normal driver to drive the motor with a bad shaft, if the motor can work normally, you can rule out the fault of the motor, you can judge that it is a problem with the drive, on the contrary, if the motor can not work normally, it can be judged that the motor is defective and the motor needs to be replaced.

NEMA 23 stepper motor set Torque 1.2Nm long 56mm + DM542 drive factory direct sales

2. The problem of the drive, through the first step, can be roughly judged to be the problem of the drive. If the power light of the drive is not lit (the driver of Norco Technology has a green power indicator), you can use a multimeter to measure the voltage at the power input of the drive, if the voltage is abnormal, you can judge that the power supply is faulty, you can replace the power supply, if the power supply voltage is normal, you can judge the internal circuit failure of the drive, it is recommended to replace the drive or return to the factory for maintenance. If the power supply voltage is normal, and the power indicator of the drive is also normal, you need to see whether the fault indicator of the drive is alarmed, if there is no alarm, you can use to screw the shaft of the motor whether it is with force, if the motor shaft does not carry force, you can use a multimeter to test whether the ENA signal is normal, if the drive is enabled effectively, but without force, judge that the driver may have circuit failure, it is recommended to replace the drive or return to the factory for repair. If the motor is normal with force, you need to check whether the pulse signal wiring is normal, you can test and judge by the multimeter, if the control pulse wiring is normal, you can judge that the internal circuit of the drive is bad, it is recommended to replace the drive or return to the factory for maintenance. If the fault light of the drive flashes, the user can troubleshoot according to the fault prompt, such as NDM552 flashes 4 times, for the motor phase loss fault, the user can check whether the motor wiring is loose; Flashing 2 times, for overvoltage fault, the user needs to check the voltage of the power supply, the driver in the working process, to ensure that the driver bus voltage does not exceed the rated working voltage of the driver, to reserve a certain safety margin.

Answer 8

《DM860H Stepping Driver》 uses ST, IR, Fenghua Hi-Tech, Taiwan Everlight and other well-known brand imported devices purchased through formal channels, using military-grade PCB plates, SMT machine patches, a variety of software and hardware anti-interference design, fully meet the requirements of industrial-grade applications, factory direct sales, one-year warranty, please use with confidence.

DM860H Stepping Driver

5V and 24V signals are universal.

Baby features: This drive is a DSP digital DM860H stepper motor driver, the subdivision is increased to 128 subdivisions, suitable for high subdivision use. Applicable stepper motor: 57, 86 type 2-phase 4-phase (4-wire, 6-wire, 8-wire)

1. 24V-110V DC/18V-80V AC power supply;

2. H-bridge bipolar constant phase current drive;

3. Eight output currents of 7.2A can be selected;

4. 15 subdivision modes can be selected to 128 subdivisions;

5. High-speed photoelectric isolation of input signal;

6. Standard single pulse interface;

7. Offline hold function;

8. Large cooling fan with high efficiency for heat dissipation;

9. Provide energy-saving semi-automatic current lock function;

10. Built-in temperature protection and overcurrent protection.

11、550g