Leadshine DM556T - User Manual

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

The DM556T is a 2-phase digital stepper drive designed for controlling NEMA 23, 24, and 34 hybrid stepper motors. It is manufactured by Leadshine® and branded by StepperOnline®. This drive is characterized by its simple design and ease of setup, making it suitable for applications requiring straightforward step and direction control.

Function Description:

The DM556T utilizes advanced stepper control technology to ensure smooth operation of 2-phase and 4-phase stepper motors, delivering optimal torque while minimizing motor heating and noise. It operates within a voltage range of 20-50VDC and can output up to 5.6A current. Both microstep resolution and output current settings are configured via DIP switches. The drive supports step & direction (PUL/DIR) control and features Multi-Stepping for smooth motor movement. It includes Anti-Resonance technology to achieve optimal torque, extra smooth motion, and reduced motor heating and noise. A key feature is its motor auto-identification and parameter auto-configuration capability, which allows it to automatically set optimal parameters for a wide range of motors. The DM556T also incorporates TTL compatible and optically isolated inputs, ensuring robust control signal integrity. It has a soft-start function to prevent sudden "jumps" when powered on and supports a pulse input frequency of up to 200 KHz. Automatic idle-current reduction is implemented to further decrease motor heating during standstill.

Important Technical Specifications:

Output Current: 1.8A (Min) to 5.6A (4.0 RMS) (Max)
Supply Voltage: 20VDC (Min), 24-48VDC (Typical), 50VDC (Max)
Logic Signal Current: 7mA (Min), 10mA (Typical), 16mA (Max)
Pulse Input Frequency: 0 (Min) to 200kHz (Max)
Minimal Pulse Width: 2.5µs
Minimal Direction Setup Time: 5.0µs
Isolation Resistance: 500 MΩ
Microstep Resolutions: 16 selectable settings from 400 to 25,600 steps/revolution (for 1.8° motors) via DIP switches.
Output Current Settings: 8 selectable settings from 1.8A to 5.6A via DIP switches.
Operating Environment:
- Ambient Temperature: 0°C to 65°C (32°F to 149°F)
- Humidity: 40%RH to 90%RH
- Operating Temperature: 0°C to 50°C (32°F to 122°F)
- Vibration: 10-50Hz / 0.15mm
- Storage Temperature: -20°C to 65°C (-4°F to 149°F)
- Cooling: Natural cooling or forced cooling.
- Environment: Avoid dust, oil fog, and corrosive gases.
Mechanical Specifications:
- Dimensions: 118mm (4.646in) x 75.5mm (2.972in) x 34mm (1.339in)
- Mounting Hole Spacing: 112mm (4.409in)
- Weight: Approximately 300g (10.6oz)

Usage Features:

DIP Switch Configuration: The DM556T features an 8-bit DIP switch for easy configuration of microstep resolution and motor operating current. SW5-SW8 control microstep resolution, while SW1-SW3 control dynamic current.
Current Settings: Users can select from 8 output current settings ranging from 1.8A to 5.6A. The actual current in the coil may be slightly lower than the set value, especially at high speeds, due to motor inductance.
Standstill Current: SW4 allows setting the standstill current to either 50% of the selected dynamic current (OFF position) or the same as the dynamic current (ON position). The current automatically reduces to 50% after 0.4 seconds of the last pulse when SW4 is OFF.
Motor Connection Flexibility: The drive supports 4-lead, 6-lead, and 8-lead stepper motors.
- 4-lead motors: Simple connection, speed-torque depends on winding inductance. Output current should be 1.4 times the specified phase current.
- 6-lead motors: Can be configured for half coil (higher speed, lower torque) or full coil (higher torque, lower speed). For full coil, motors should run at 70% of rated current to prevent overheating.
- 8-lead motors: Offer high flexibility with series or parallel connections. Series connection provides higher torque at lower speeds but degrades at higher speeds; motors should run at 70% of rated current. Parallel connection offers more stable performance and higher torque at higher speeds; output current should be 1.96 times the unipolar current rating or 1.4 times the bipolar current rating.
Power Supply Selection: Both regulated and unregulated power supplies can be used. Unregulated supplies are preferred for their ability to handle current surges. For unregulated supplies, a lower current rating (50-70% of motor current) than the motor's current rating can be used. Multiple DM556T drives can share a single power supply if it has sufficient capacity, with individual connections to avoid cross-interference. The recommended supply voltage range is +24 to +48 VDC to account for fluctuations and back-EMF.
Control Signal Interface: The drive accepts differential and single-ended inputs (open-collector and PNP output) via 3 optically isolated logic inputs on connector P1, enhancing noise immunity.
Automatic Motor Matching & Self Configuration: Upon power-on, the DM556T automatically configures itself with optimal settings for the connected stepper motor, requiring no manual intervention.

Maintenance Features:

Heat Dissipation: For reliable operation, the DM556T's working temperature should remain below 60°C (140°F). Side mounting is recommended to maximize heat sink area. Forced cooling may be necessary in some applications. Utilizing the automatic idle-current reduction feature (SW4 set to OFF) helps reduce motor heating.
Wiring Notes:
- Twisted pair shielded cables are recommended for control signals to improve anti-interference performance.
- PUL/DIR control signal wires and motor wires should be separated by at least 10 cm to prevent interference.
- Avoid daisy-chaining power supply connections for multiple drives; connect each drive separately to the power supply.
- Warning: Do not plug or unplug the P1 & P2 terminal blocks while the drive is powered on to prevent damage from high back-EMF voltage surges.
Protection Functions: The drive includes built-in protections for enhanced reliability:
- Over-current protection: Activated when peak current exceeds the limit (indicated by one red LED blink).
- Over-voltage protection: Activated when drive working voltage exceeds 60VDC (indicated by two red LED blinks).
- Reserved protection: Indicated by three red LED blinks.
- When protections are active, the motor shaft will be free, and the red LED will blink. Resetting the drive by repowering it after resolving the issue will restore functionality.
Troubleshooting Guide: The manual provides a comprehensive troubleshooting section with common symptoms (e.g., motor not rotating, wrong direction, erratic motion, stalling) and their possible causes (e.g., incorrect DIP switch settings, wiring errors, control signal issues, undersized motor, inadequate cooling).
Warranty: StepperOnline offers a twelve-month warranty against defects in materials and workmanship from the date of shipment. Warranty service requires a Returned Material Authorization (RMA) number. Exclusions include damage from improper handling, wiring, unauthorized modification, misuse, or operation outside electrical or environmental specifications.