Introduction |
The DM856 is a versatility fully digital stepping driver based on a DSP with advanced control algorithm. The DM856 is the next generation of digital stepping motor controls. It brings a unique level of system smoothness, providing optimum torque and nulls mid-range instability. Motor auto-identification and parameter auto-configuration 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 drivers in the markets. Its unique features make the DM856 an ideal solution for applications that require low-speed smoothness.
Compared to the DM432, broader input voltage and output current ranges make the DM856 can drive much more motors than the DM432. What’s more, owing to its higher performance DSP, driven motors can achieve much higher speed (above 3000RPM) than that of the DM432, offering servo-like performances. It can be regarded as an improved model origin from DM556, while supports broader input voltage range. |
Applications |
Suitable for a wide range of stepping motors, from NEMA frame size 17 to 34. It can be used in various kinds of machines, such as laser cutters, laser markers, high precision X-Y tables, labeling machines, and so on. Its unique features make the DM856 an ideal solution for applications that require both low-speed smoothness and high speed performances. |
Electronic Specifications (Tj=25℃) |
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Mechanical Specifications (Unit: mm [inch], 1 inch=25.4 mm) |

Figure 1: Mechanical Specifications |
Pin Assignment and Description |
Control Signal Connector P1 pins |
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Power connector P2 pins |

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Microstep Resolution Selection |
When it’s not in software configured mode, microstep resolution is set by SW5, 6, 7, 8 of the DIP switch as shown in the following table: |
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Current Setting |
When it’s not in software configured mode, the first three bits (SW1, 2, 3) of the DIP switch are used to set the dynamic current. Select a setting closest to your motor’s required current. |
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Typical Connections |

Figure 2: Typical Connections
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