Stepper Motor Driver, DM860A, 8.4A

In stock - 23 items available
SKU: STP012
Regular price R 1,199.95 incl. VAT

DM860A is a two phase hybrid stepper motor driver, it designed to get the most out of your stepper motor. This driver can be used with motors requiring a current of up to a peak of 8.4A. This driver is typically used with CNC machines, 3D printers, laser cutting machines and other automation machines.

Specifications

  • 2 Phase stepper driver
  • Input Voltage: 24 - 110VDC or 18 - 80VAC
  • Input current: <6A
  • Optional 50% idle current reduction setting
  • Output current: 8 channel current setting
  • Opto-isolated inputs
  • Manufacturer product code: DM860A

 

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 is set to be the same as the selected dynamic current.

  • Output current setting:

The first three bits (SW 1, 2, 3) 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

Reference Current

Peak Current

ON

ON

ON

2.0

2.8

OFF

ON

ON

2.5

3.5

OFF

ON

OFF

3.2

4.5

ON

ON

OFF

3.8

5.3

OFF

OFF

ON

4.2

5.9

ON

OFF

ON

4.8

6.7

OFF

ON

ON

5.3

7.4

ON

ON

ON

6.0

8.4

 

  • Power connections

(1)+V、GND:Power Supply.

+V: Power supply, 18~80 VAC, Including voltage fluctuation and EMF voltage.

(2) A+ A- B+ B-:Connecting 2 phase stepper motors.

The driver & 2-phase hybrid stepping motor use four-wire connection, the motor can be connected in parallel & series bipolar. As for bipolar connection, it is higher performance with high-speed, but the current of driver is larger (it is 1.73 times more than the motor’s winding current).
Connecting in series, the driver’s current is equal to the motor winding one.

  • Mounting

There should be 20mm of space all sides of the driver, it can’t be placed next to other heating devices and avoid dust, oil, mist, corrosive gas, humidity and strong vibration areas.

Physical Dimensions:

  • 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) Trouble shooting

Alarm indicator

Reasons

Measures

LED off turn

Wrong connection for power

Check wiring of power

Low-voltages for power

Enlarge voltage of power

Motor doesn’t run, without holding torque

Wrong connection of stepper motor

Correct its wiring

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

Motor runs wrong direction

Wrong wires’ connection

Change connection for any of 2 wires

Wrong input direction signal

Change direction setting

Motor’s holding torque is too small

Too small relative to current setting

Correct rated current setting

Acceleration is too fast

Reduce the acceleration

Motor stalls

Rule out mechanical failure

Driver does not match with the motor

Change a suitable driver