Stepper Motor Driver, DM860A, 8.4A

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

• 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