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DM865 Two-phase digital stepper driver
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Overview
DM865 is a new generation of high-performance two-phase digital stepping driver based on 32-bit DSP technology developed by our company, with a driving voltage of 18-80Vdc, adaptable to a current of 6.5A or less, with an external diameter of 57-86mm of various models of two-phase hybrid stepping motors.
The driver samples servo-like control principle, unique circuit design, superior software algorithm processing, so that the motor can run smoothly, almost no vibration and noise. Smooth and precise current control technology greatly reduces motor heating. External 16-step adjustable maximum speed.1 6-step adjustable maximum current. Optocoupler isolated differential signal input, strong anti-interference ability, with over-voltage, under-voltage, over-current protection and other error protection functions. Potentiometer to realize stepless speed change!
Characteristic
• PI control algorithm, low noise, low vibration, low heat generation;
• Signal input: single-ended, pulse + direction and dual pulse;
• Built-in microstepping; power supply: maximum up to DC90V;
• Current setting is convenient, 16 levels optional, output current peak up to 7A-6.5A; current is halved after 1 second of inactivity;
• Factory default highest microstepping adjustable up to 25,600 levels.
• Optically isolated differential signal input, input pulse frequency up to 300KHz.Adapts to 4, 6, 8-wire 2-phase stepper motors with 57 and 60 flanges.
• Over-voltage, under-voltage alarm, phase current over-current protection, motor phase open circuit detection and other functions.
• Pulse, direction and enable terminals have constant current input function, can be directly connected to the input signal.
• It can be directly connected to the input signal without the need for external series current-limiting protection.
• Self-generated pulse: built-in oscillator, dial code or switching signal control motor start/stop, 16 speeds switching by itself.Performance indicators
Electrical indicators
Describe DM865 Min. values Typical values Max.values Unit Output Current (Peak) 2.8 - 6.5 A Supply Voltage 18 - 80 VDC Control Signal Current 6 10 16 mA Step Pulse Frequency 0 - 300 KHz Step Pulse Width - - - us Direction Signal Width 100 - - us Undervoltage Protection Point - 18 - VDC Overvoltage Protection Point - 90 - VDC Driver Initialization Time 2 - - s Insulation Resistance 500 MΩ Environmental indicators
Cooling method Natural or forced air cooling Operating environment Occasions for use Can not be placed next to other heat-generating equipment, to avoid dust, oil, corrosive gases, too much humidity and strong vibration places, prohibit combustible gases and conductive dust; Temp 0-+50℃ Humidity 40-90%RH Vibration 10~55Hz/0.15mm Storage temperature -20℃~65℃ Weight 0.28kg 
Control signal wiring instructions
Function Symbolic Mean Note Pulse Signal PUL+ Start/stop signal positive Default pulse is valid on the falling edge; pulse width should be greater than 1.2μs for reliable response to pulse signals Input voltage range: 3.3~28V. PUL- Start/stop signal negative Direction Signal DIR+ Direction signal positive The motor's rotation direction depends on the DIR signal. When the DIR signal is floating or at a low level, the motor rotates clockwise; when the DIR signal is high, the motor rotates counterclockwise. To ensure reliable motor direction switching, the direction signal should be established at least 5μs before the pulse signal. The motor's initial running direction is related to the motor winding connections; swapping any winding pair (such as A+ and A-) can change the motor's initial running direction.Input voltage range: 3.3V~28V. DIR- Direction signal negative Enable Signal EN+ Enable signal positive Enable control signal: This input signal is used to enable or disable the driver output.When ENA is at a low level (or the internal optocoupler is conducting), the driver cuts off the current to all motor phases, putting the motor in a free state and ignoring step pulses.If this function is not needed, simply leave the enable signal terminal floating.Input voltage range: 3.3~28V. EN- Enable Signal Negative Alarm Signal ALM+ Alarm Signal Positive Output It can be changed to a position signal and a brake signal through the host computer software. ALM- Alarm Signal Negative Output Wiring instructions for power supply and motor
Function Symbolic Mean Note Power Input V+ DC Power Supply Positive DC Power:18VDC-80VDC V- DC Power Supply Negative Motor Wiring A+ Stepper Motor Phase A Winding Swapping either the A+ and A- winding connections or the B+and B- winding connections can change the motor's initial running direction. A- B+ Stepper Motor Phase B Winding B- Current and microstepping configuration
An 10-bit DIP switch is used to set the subdivision, operating current, pulse mode selection, and self-running mode.
Detailed descriptions are as follows:(The locked rotor holding current can be internally jumper-set to full current, with a default of 50%.)
Maximum Current Settings SW1 SW2 SW3 SW4 Maximum Speed Settings SW5 SW6 SW7 SW8 Continuous Self-Runnings SW9 SW10 Single/Dual pulse Self-Running Current Settings
Current(peak) SW1 SW2 SW3 SW4 6.5A ON ON ON ON 6.2A OFF ON ON ON 6.0A ON OFF ON ON 5.8A OFF OFF ON ON 5.5A ON ON OFF ON 5.2A OFF ON OFF ON 5.0A ON OFF OFF ON 4.8A OFF OFF OFF ON 4.5A ON ON ON OFF 4.2A OFF ON ON OFF 4.0A ON OFF ON OFF 3.8A OFF OFF ON OFF 3.5A ON ON OFF OFF 3.2A OFF ON OFF OFF 3.0A ON OFF OFF OFF 2.8A OFF OFF OFF OFF Subdivision Settings
Subdivision
(Steps/Turn)SW5 SW6 SW7 SW8 5 ON ON ON ON 10 OFF ON ON ON 15 ON OFF ON ON 30 OFF OFF ON ON 60 ON ON OFF ON 90 OFF ON OFF ON 120 ON OFF OFF ON 150 OFF OFF OFF ON 180 ON ON ON OFF 210 OFF ON ON OFF 240 ON OFF ON OFF 300 OFF OFF ON OFF 400 ON ON OFF OFF 500 OFF ON OFF OFF 650 ON OFF OFF OFF 800 OFF OFF OFF OFF Operation Mode Settings
Operating mode SW9 SW10 Single Pulse (Default) OFF OFF Dual Pulse ON OFF I/O Control Mode OFF ON Self-Running Mode ON ON Driver status LED indicator
LED codes ERROR ● Green light always on Motor running ●● Green light flashing Motor stopped ●● One red, one green Driver overcurrent ●●● Two red and one green Motor winding open circuit ●●●● Three red and one green Driver input overvoltage ●●●●● Four red and one green Driver input undervoltage ●●●●●● Five red and one green Others
DM865 Two-phase digital stepper driver
Still deciding? Get samples first, Contact US !
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