LONGS DM860A Manual Download Page 7

                                         

 

                                                                                                                                                                                   

                                                                   

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6. Adjustment of troubleshooting

 

 

1) , the status on light’s indication 
PWR: green, normal work light. 
ALM: red, failure light, the motor with phase short-circuit, overvoltage and under-voltage 
protection. 
 

2) Troubles 

Alarm indicator   

 

Reasons Measures 

Wrong connection for power 

Check wiring of power   

LED off turn 

Low-voltages for power   

Enlarge voltage of power 

Wrong connection of stepper 
motor 

Correct its wiring 

Motor doesn’t run, without 
holding torque   

RESET signal is    effective 
when offline 

Make RESET ineffective 

Motor doesn’t run, but 

maintains

 holding torque 

Without input pulse signal   

Adjust PMW & signal level 

Wrong wires’ connection   

Change connection for any of 

2 wires 

Motor runs wrong direction 

Wrong input direction signal 

Change direction setting 

Too small relative to current 
setting 

Correct rated current setting 

Acceleration is too fast 

Reduce the acceleration 

Motor stalls 

Rule out mechanical failure 

Motor’s holding torque is 
too small 

Driver does not match with the 
motor  

Change a suitable driver 

 

 

 

 

 

7. Driver wiring 

 

A complete stepper motor control system should contain stepper drives, DC power supply and 
controller (pulse source). The following is a typical system wiring diagram

 

Summary of Contents for DM860A

Page 1: ... also significantly higher than the other two phase driver what s more the positioning accuracy is also higher It is widely used in middle and big size numerical control devices such as curving machine CNC machine and computer embroider machine packing machines and so on Features z High performance low price z Average current control 2 phase sinusoidal output current drive z Supply voltage from 24...

Page 2: ...escription 1 Connector Pins Configurations Pin Function Details PUL PUL Pulse signal PUL is the positive end of pulses input pin PUL is the negative end of pulse input pin DIR DIR DIR signal DIR is the positive end of direction input pin DIR is the negative end of direction input pin ENBL Enable signal ENBL is the positive end of direction input pin This signal is used for enabling disabling the d...

Page 3: ... electrical level is active all control negative signals will be connected together to GND When low electrical level is active all control positive signals will be connected together to public port Now give two examples Open collector PNP please check them Fig 1 Input port circuit Yang connection PC open connector output 3 ...

Page 4: ...function 1 Micro step resolution is set by SW 5 6 7 8 of the DIP switch as shown in the following table SW5 ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF ON OFF OFF SW6 ON ON OFF OFF ON ON OFF OFF ON ON OFF OFF ON ON OFF SW7 ON ON ON ON OFF OFF OFF OFF ON ON ON ON OFF OFF OFF SW8 ON ON ON ON ON ON ON ON OFF OFF OFF OFF OFF OFF ON PULSE R EV 400 800 160 0 320 0 640 0 128 00 256 00 512 00 100 0 200 0 50...

Page 5: ...of the DIP switch are used to set the dynamic current Select a setting Closest to your motor s required current Output current A SW1 SW2 SW3 PEAK RMS ON ON ON 2 80 2 00 OFF ON ON 3 50 2 50 ON OFF ON 4 20 3 00 OFF OFF ON 4 90 3 50 ON ON OFF 5 70 4 00 OFF ON OFF 6 40 4 60 ON OFF OFF 7 00 5 00 OFF OFF OFF 7 80 5 60 4 Semi flow function Semi flow function is that there is not step pulse after200 ms th...

Page 6: ...pins 5 6 DC DC Power supply Power supply DC24 80VDC The peak input current can not up to 6A 5 Mechanical Specification To have 20mm of space around cannot be placed next to other heating devices What s more avoid dust oil mist corrosive gas heavy humidity and high vibration Unit mm pic 3 6 ...

Page 7: ...ine Make RESET ineffective Motor doesn t run but maintains holding torque Without input pulse signal Adjust PMW signal level Wrong wires connection Change connection for any of 2 wires Motor runs wrong direction Wrong input direction signal Change direction setting Too small relative to current setting Correct rated current setting Acceleration is too fast Reduce the acceleration Motor stalls Rule...

Page 8: ...ither at is option repair or replace products which proved to be defective Exclusions The above warranty does not extend to any product damaged by reasons of improper or inadequate handlings by customer improper or inadequate customer wirings unauthorized modification or misuse or operation beyond the electrical specifications of the product and or operation beyond environmental specifications for...

Page 9: ...pay for return of products to customer Warranty Limitations LONGS MOTOR makes no other warranty either expressed or implied with respect to the product LONGS MOTOR specifically disclaims the implied warranties of merchantability and fitness for a particular purpose Some jurisdictions do not allow limitations on how long and implied warranty lasts so the above limitation or exclusion may to apply t...

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