Features Heatsink integrated and connectors included Input: 20 to 80 VDC; Output: 0.5 and 5.6A Utility software for tuning drive parameters from a desktop computer Super low noise; super low motor heating; extra smooth at low speed Anti-Resonance, provides optimum torque and nulls mid-range instability Motor self-test and parameter auto-setup technology, offers optimum responses with different motors Multi-stepping allows a low resolution step input to produce a higher microstep output for smooth system performance Microstep resolutions programmable, from full-step to 102,400 steps/rev Output current programmable, any value between 0.5A and 5.6A Pulse input frequency up to 200 KHz TTL compatible and optically isolated input Automatic idle-current reduction Suitable for 2-phase and 4-phase motors Support PULSE/DIRECTION and CW/CCW modes Over-voltage, over-current, phase-error protections Dimensions: 4.65 X 2.97 X 1.34 inches; 9.9 oz CE certified Introduction The DMD8056 is a versatility fully digital stepper drive based on a DSP with advanced control algorithm. The DMD8056 is the next generation of digital stepper motor controls. It brings a unique level of system smoothness, providing optimum torque and nulls mid-range instability. Motor self-test and parameter auto-setup technology offers optimum responses with different motors and easy-to-use. The driven motors can run with much smaller noise, lower heating, smoother movement than most of the drives in the markets. Its unique features make the DMD8056 an ideal solution for applications that require low-speed smoothness. Applications Suitable for a wide range of stepping motors of NEMA 23 and 34, and usable for various kinds of machines, such as X-Y tables, labeling machines, laser cutters, engraving machines, and pick-place devices. Particularly useful in applications with extremely low noise and low vibration, high speed and high precision are desired. Electric Specifications (Tj=25℃) Parameters MDN556 Min. Typical Max. Unit Output current 1.4 - 5.6 (4A RMS) Amps Supply voltage (DC) 20 - 80 VDC Logic signal current 7 10 16 mA Pulse input frequency 0 - 200 Khz Isolation resistance 500 - - MΩ Mechanical Specifications (Unit: mm, 1 inch=25.4 mm) Figure 1 Mechanical specifications Pin Assignment and Description Control Signal Connector P1 pins Pin Function Details PUL﹢(+5V) Pulse signal: in single pulse (pulse/direction) mode, this input represents pulse signal, effective for each rising edge; 4-5V when PUL-HIGH, 0-0.5V when PUL-LOW. In double pulse mode (pulse/pulse) this input represents clockwise (CW) pulse. For reliable response, pulse width should be longer than 2.5us. Series connect resistance for current-limiting when +12V or +24V used. PUL- (PUL) DIR+ (+5V) DIR signal: HIGH/LOW level signal, corresponding to motor rotor direction. For reliable response, DIR must be ahead of PUL by 5ms at least, the initial motor direction is related with motor wiring, exchange any set of coil can reverse motor initial direction. 4-5V when DIR- HIGH, 0-0.5V when LOW. DIR- (DIR) ENA+ (+5V) Enable signal: this signal is used for enabling/disabling the driver. High level for enabling the driver and low level for disabling the driver. Usually left unconnected (enabled). ENA- (ENA) Power connector P2 pins Pin Funtion Details Gnd DC power ground +V DC power supply, +20VDC － +50VDC, Including voltage fluctuation and EMF voltage. Phase A Motor coil A (leads A+ and A-) Phase B Motor coil B (leads B+ and B-) Microstep Resolution Selection Microstep resolution is specified by 5, 6, 7,8 DIP switches as shown in the following table: Microstep usteps/rev.( 1.8°/rev) SW5 SW6 SW7 SW8 2 400 OFF ON ON ON 4 800 ON OFF ON ON 8 1600 OFF OFF ON ON 16 3200 ON ON OFF ON 32 6400 OFF ON OFF ON 64 12800 ON OFF OFF ON 128 25600 OFF OFF OFF ON 5 1000 ON ON ON OFF 10 2000 OFF ON ON OFF 20 4000 ON OFF ON OFF 25 5000 OFF OFF ON OFF 40 8000 ON ON OFF OFF 50 10000 OFF ON OFF OFF 100 20000 ON OFF OFF OFF 125 25000 OFF OFF OFF OFF Current Setting Peak Current (A) RMS (A) SW1 SW2 SW3 1.4 1.0 OFF OFF OFF 2.1 1.5 ON OFF OFF 2.7 1.9 OFF ON OFF 3.2 2.3 ON ON OFF 3.8 2.7 OFF OFF ON 4.3 3.1 ON OFF ON 4.9 3.5 OFF ON ON 5.6 4.0 ON ON ON Typical Connections Figure 2: Typical connections