DM420, 2 Phase Digital Stepper Drive; Max 36 VDC / 2.0A (kopie)

– Supply voltage from 12VDC to 36VDC
– Opto-isolated signal I/O
– Overvoltage, under voltage, overcorrect, phase short circuit protection
– 8 channels subdivision and automatic idle-current reduction
– 8 channels output phase current setting
– Offline command input terminal
– Motor torque is related with speed, but not related with step/revolution
– High start speed
– High hording torque under high speed

Pins assignments and description:

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 driver. High level for enabling the driver and low level for disabling the driver.
ENBL-	ENBL- is the negative end of direction input pin. Usually left unconnected (enabled)

 

3.Function choice ( Using DIP pins to achieve this 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
SW6	ON	ON	OFF	OFF	ON	ON	OFF	OFF
SW7	ON	ON	ON	ON	OFF	OFF	OFF	OFF
Pulse/rev	200	400	800	1600	3200	6400	12800	25600
Micro	1	2	4	8	16	32	64	128

2) Standstill current setting

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.

3) 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

SW1	SW2	SW3	PEAK	RMS
ON	ON	ON	0.44 A	0.31 A
OFF	ON	ON	0.62 A	0.44 A
ON	OFF	ON	0.74 A	0.52 A
OFF	OFF	ON	0.86 A	0.61 A
ON	ON	OFF	1.46 A	1.03 A
OFF	ON	OFF	1.69 A	1.20 A
ON	OFF	OFF	2.14 A	1.51 A
OFF	OFF	OFF	2.83 A	2.00 A

 

Troubles

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