LONGS DM860A User manual

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DM M8 86 60 0A A
Introduction:
DM860A is a type of two-phase hybrid stepping motor driver, The drive voltage of which
is from 24VDC to 80VDC. It is designed for use with 2-phase hybrid stepper motor of all kinds
with 57mm to 110mm outside diameter and less than 8.0A phase current. This circuit that it
adopts is similar to the circuit of servo control which enables the motor run smoothly almost
without noise and vibration. Hording torque when DM860A run under high speed is 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:
zHigh performance, low price
zAverage current control, 2-phase sinusoidal output current drive
zSupply voltage from 24VDC to 80VDC
zOpto-isolated signal I/O
zOvervoltage, under voltage, overcorrect, phase short circuit protection
z14 channels subdivision and automatic idle-current reduction
z8 channels output phase current setting
zOffline command input terminal
zMotor torque is related with speed, but not related with step/revolution
zHigh start speed
zHigh hording torque under high speed
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Electrical specification:
Input voltage 24-80VDC
Input current ＜6A
Output current 2.8A～7.8A
Consumption Consumption：80W；Internal Insurance：10A
Temperature Working Temperature -10～45℃；
Stocking temperature -40℃～70℃
Humidity Not condensation, no water droplets
gas Prohibition of combustible gases and conductive
dust
weight 500G
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)

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2) Pins wiring diagram:
PC’s control signals can be active in high and low electrical level. When the high 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
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Fig. 2 Input port circuit ( Yin connection)
PCPNPoutput
Note: When VCC=5V, R=0
WhenVCC=12V,R=1K, ＞1/8W
When VCC=24V, R=2K,＞1/8W
R must connect in the control signal part .
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 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
500
0
100
00
250
00
500
00
512
00
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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
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, the driver output current
automatically reduced to 40% of rated output current, which is used to prevent motor heat.

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4. Pins of motor & power:
1A+
2A-
3B+
4B-
Motors wiring
Motor
and
power
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
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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

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8. APPENDIX
Twelve Month Limited Warranty
LONGS MOTOR. warrants its products against defects in materials and workmanship for a
period of 12 months from shipment out of factory .During the warranty period, LONGS MOTOR
will either ,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 the product.
Obtaining Warranty Service
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To obtain warranty service, a returned material authorization number(RMA)must be obtained
from customer service at e-mail:[email protected]. Before returning product for
service. Customer shall prepay shipping charges for products returned to LONGS MOTOR for
warranty service, and LONGS MOTOR shall 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 to you, however, any
implied warranty of merchantability or fitness is limited to the12-month duration of this written
warranty.