PacSci Model 6410 Microstep Driver

Technical features:

High back electromotive force suppression: When the motor is running at high speed, the back electromotive force will hinder the establishment of current. The 6410 chopper circuit can effectively overcome this impact and ensure the integrity of the current waveform at high speeds.

Low ripple current: reduces the fluctuation of winding current, lowers the iron and copper losses of the motor, thereby reducing the heating of the driver and motor.

Low electrical noise: The chopping frequency of 20 kHz exceeds the audible range of the human ear (although there may still be slight noise, it is much lower than low-frequency choppers), making it more suitable for quiet environments.

Synergistic effect with digital electronic damping:

The combination of a 4-phase control circuit and digital electronic damping enables the 6410 to provide more motor output power than other drivers, especially in applications that require rapid acceleration, deceleration, and variable loads.

Idle current reduction: reduces motor heating and extends lifespan

The stepper motor maintains its rated current to maintain torque even in a stationary state, which can cause the motor to overheat for a long time, affecting its lifespan and accuracy. 6410 provides Idle Current Reduction function.

Working Principle:

When the driver does not receive any step instructions within 0.1 seconds, it automatically reduces the motor winding current to 50% of the rated value.

After the current decreases, the holding torque decreases accordingly, but it is sufficient to meet most static positioning requirements while significantly reducing heat generation.

Once a new step pulse is received, the current immediately returns to full amplitude.

Optional idle timeout period:

In addition to the default 0.1 seconds, users can also select timeout thresholds of 0.05 seconds or 1.0 seconds through DIP switches or jumpers.

For applications that require longer holding torque and allow for higher temperature rise, the idle current reduction function can also be completely disabled.

Comprehensive fault protection mechanism

6410 is equipped with multiple hardware fault detection circuits, which can automatically disable the driver output in abnormal situations, protecting the motor and the driver itself. All faults need to be cleared by re powering on.

Protection type:

Output short circuit protection: detects wire to wire short circuits between motor windings and wire to neutral short circuits.

Internal power undervoltage protection: prevents abnormal operation of power tubes due to insufficient power supply.

Bus overvoltage protection: When the DC bus voltage exceeds 83 Vdc, the protection is triggered to prevent power device breakdown.

These protection functions enable 6410 to adapt to harsh conditions such as power fluctuations and wiring errors in industrial sites, improving the robustness of the system.

Heat dissipation design and installation flexibility

Thermal management is the key to the long-term stable operation of stepper drives. 6410 provides two cooling paths to meet different system integration requirements.

Cooling method

Cold plate installation (back heat dissipation): Directly attach the metal back plate of the drive to the cooling plate or chassis shell of the device, utilizing system level heat dissipation. For uneven surfaces, it is recommended to use thermal pads or thermal grease.

Optional side mounted heat sink: When back cooling is not possible, the HS6410 side mounted heat sink can be used. After installation, it only increases the width by 1 inch, but it can significantly improve the heat dissipation capacity.

Relationship between rated current and temperature:

No radiator: maximum 2.5 A rms at 25 ° C ambient temperature; The ambient temperature drops to 1.25 A rms at 45 ° C.

Equipped with a side mounted radiator: capable of reaching a full rated value of 5 A at an ambient temperature of 25 ° C; Maximum 2.5 A rms at an ambient temperature of 45 ° C.

Best practice: It is recommended to always maintain the temperature of the drive chassis (back or side) at no more than 60 ° C. If necessary, a fan can be used for forced air cooling or the idle current reduction function can be activated.

Power dissipation curve:

The power dissipation of the driver is approximately proportional to the square of the output current. At 5 A output, the typical dissipation is about 20 W, requiring sufficient heat dissipation area.

Input/output interfaces and signal specifications

The interface design of 6410 is simple and comprehensive, and all control signals are isolated by optocouplers, improving anti-interference ability.

Control input (J3 interface, 9-pin D-sub):

STEP: Optocoupler isolation, TTL compatible. Minimum conduction current 5.5 mA, maximum 10 mA. Rising edge triggers step.

DIR (direction): Optocoupler isolation. The minimum conduction current is 3 mA and the maximum is 4.5 mA. The setting time is 50 μ s and the holding time is 0.

ENABLE: Logic polarity can be selected through jumper (ENBL_SENSE). When the jumper is inserted, the optocoupler conducts to enable the driver; When the jumper is pulled out, the optocoupler conducts and the driver is disabled. The minimum conducting current is 3 mA, and the maximum is 4.5 mA.