Purelogic PLD880 - User Manual

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features
Warranty Terms

The PLD880 is a microstepping stepper motor driver designed by Purelogic R&D. It is suitable for controlling bipolar and unipolar stepper motors, particularly Purelogic R&D's PL86 series, but can also work with other stepper motors.

Function Description

The PLD880 driver operates with standard STEP/DIR/ENABLE control protocols. It features optoisolated control inputs compatible with 2.5V, 3.3V, and 5V logic levels. The device includes several built-in protections and functionalities:

Coil Short-Circuit Protection: Safeguards against short circuits in the motor coils.
Back EMF Effect Protection: Protects against voltage spikes generated by the motor.
Automatic Compensator of Normal Speed Stepper Motor Resonance: Reduces vibrations at mid-frequencies (6-12 cycles per second).
Phase Current Change Scheme with Frequency Increase (Morphing): Transitions from microstep to step mode with increasing frequency to ensure smooth operation.
Polarity Reversal Power Protection: Prevents damage if the power supply polarity is reversed (the driver will not switch on).
Soft Starter Scheme: Gradually increases current in stepper motor coils upon power-on or ENABLE signal activation, preventing sudden jolts.
STEP Inbuilt Frequency Generator: Allows for testing the driver without a PC or external generator, with frequency adjustable via the FREQ potentiometer.
AUTO-SLEEP Mode: The driver automatically enters rotor hold mode (full/half operating current) after 1 second of standstill (lack of STEP signal) to reduce heating. The coil current in AUTO-SLEEP mode is set by DIP-switch SW5.
Discrete Regulation of Operating Current: Allows for precise adjustment of stepper motor phase currents using DIP-switches (SW1, SW2, SW3, and multiplier factor SW4).
Phase Current Adaptation (Smooth Running): Adjustable via the PHASE TRIM potentiometer to reduce vibrations and uneven stepping at low revolutions.
Inbuilt Dumper: A back EMF compensation device from the stepper motor.
Optoisolated Output of Driver Alarm Signal: Provides an alarm signal, duplicated in the DB-9M connector.
Convenient Connectors: Features dismountable clip connectors for the stepper motor, power source, and control signals.
DB-9M Connector: Duplicates STEP/DIR/ENABLE/ALARM signals for convenient connection to PLC4x-G2.

Important Technical Specifications

Module Power Supply: 18...80V (bogey value 75V).
Operating Current of Stepper Motor Driver: 2.3...8A (discrete adjustment, see Fig. 2 in manual).
Step Division (Microstep): 1:2, 1:4, 1:8, 1:16, 1:32.
STEP Inbuilt Generator Frequency: 600...3,000 Hz.
STEP Max Signal Frequency: 270 kHz.
Max Shaft Rotation Frequency: 42 cycles per second or 2530 cycles per minute (tested with PL86H113, 75V, step division 1:32, 270 kHz).
Isolation Resistance: 500 MOhm.
Operating Temperature: 0...60 °C.
Unit Weight (without packaging): 0.6 kg.
Control Signal Characteristics (STEP/DIR/ENABLE):
- Working voltage: 2.5V, 3.3V, 5V (may require extra current-limiting resistor).
- Current consumption: up to 20mA.
- Min STEP signal duration: 2ms.
- DIR action time: 200 nsec before/after STEP front edge.
- ENABLE action time: 100 ms.
- Logic unit (voltage applied to input) for ENABLE: driver is off, coils are cut off.
- Zero for ENABLE: driver is on, coils are supplied.

Usage Features

Power Off Before Changes: Always power off the device before making any connections or changing mode operations.
Power Switch Placement: The power switch should be installed before the power supply, at the ~220V side, not on the driver power line.
Connection Type: Only 'star' connection is allowed for multiple drivers; do not connect drivers in series.
Power Supply Polarity: Strictly observe the polarity of power supply and control signals connections. Do not connect the power supply's negative terminal to ground, mass, or housing.
Optimal Supply Voltage: Calculated as U = 32 * v (stepper motor phase inductance in mH), but not more than 80V.
Supply Current: Should be 50-70% of the claimed stepper motor coil current.
Phase Current Adaptation: Use the PHASE TRIM potentiometer to reduce vibrations. Start with the potentiometer at the extreme left (minimum value), then gradually adjust while observing motor behavior.
Stepper Motor Connection: Connect according to Fig. 2 (clips PH1.1[+A], PH1.2[-А] and РН2.1[+B], PH2.2[-B]). Note that swapping PH1.x and PH2.x phases will reverse motor rotation.
Wire Length: Wires leading to the stepper motor should not exceed 10 meters to avoid driver work failures. It is recommended to interlace stepper motor wires per phase and enclose them in a screened metal sheath, with sheaths and the stepper motor frame grounded.
Step Division: Electronically divides physical stepper motor steps into 2, 4, 8, 16, and 32 microsteps. This improves positioning accuracy and reduces resonances at low revolutions. Recommended divisions are 1:8, 1:16, or 1:32 for smoothest operation. Step division mode is set via DIP-switches SW6, SW7, SW8, and must be performed only when the driver supply is OFF.
Inbuilt STEP Frequency Generator: Can be activated by turning on SW10 to operate the driver with DIR/ENABLE signals and change step division without external control.

Maintenance Features

Environmental Conditions:
- Working temperature: 0~45 °C.
- Working humidity: 40~80% (non-condensing).
- Storage temperature: -40~55 °C.
- Storage humidity: lower than 80% (non-condensing).
- Vibration: lower than 0.5G.
- Avoid direct sunlight, oil mist, salt erosion, corrosive liquids, and gases.
Protection Functions:
- Polarity Reversal Power Protection: Driver will not switch on if polarity is reversed.
- Wrong Stepper Motor Coil Connection Protection: Protects against incorrect wiring or linked coils.
- Voltage Jump Protection: Operates when voltage exceeds 90V, protecting against back EMF effects.
- Softstarter: Gradually increases current to prevent sudden jolts.
- Phase Current Adjustment: Helps eliminate vibrations at low revolutions.
- Automatic Compensator: Removes mid-frequency resonance effects.
- LED Indicators: Green LED POWER, green LED STEP/ENB, and red LED ERROR flash on power-up. Red ERR LED goes out in 1 sec if no alarm. Green STEP/ENB LED is on (if ENABLE=0) or blinks (with STEP frequency), or goes out (if ENABLE=1).
- Alarm Indication: When a protection function operates, the driver switches off motor coils, the red ERR LED flashes, the green STEP/ENB LED goes out, and the opto-coupler of error closes/opens. The opto-coupler's collector (C) and emitter (E) are terminated to the DB-9M connector. SW9 (Function) inverts the opening/closing of the opto-coupler error.
- Restoration: The driver restores operation after the alarm cause is removed and power supply is switched off/on.

Warranty Terms

Warranty Period: 12 months after purchase, valid only if operational conditions and scheduled maintenance are strictly followed.
General Terms:
- Seller guarantees the working ability of individual components but does not assume responsibility for the quality of their joint work if purchased as separate components.
- Seller does not guarantee compatibility with products already owned by the buyer or bought from third parties.
- Product components and configuration may change without notice due to continuous technical improvement.
Warranty Acceptance Conditions: Product must be returned in the same complete set as purchased.
Warranty Service Procedure: Service involves testing the claimed defect. If the defect is proven, warranty repair is carried out.
Exclusions: Warranty does not cover glass, electric lamps, starters, and expendable materials, nor damage caused by:
- Inappropriate transport or storage conditions.
- Wrong connection or operation in abnormal/off-design mode.
- Conditions outside manufacturer-supplied temperature and humidity limits.
- Third-party circumstances (voltage jumps, natural disasters).
- Mechanical or thermal damages.
- Traces of foreign objects (dust, liquids, insects) or extraneous inscriptions.
- Unauthorized tampering or repair (opening, home-made soldering, component changes).
- Self-diagnostic function showing improper exploitation.
- Assembly, integration, and start-up not performed by Seller specialists or recommended organizations (unless regulated by goods documentation).
- Exploitation under power supply conditions not meeting manufacturer's requirements, or without an electrical protection device.
- Resale of the product to a third party by the initial buyer.
- Defects caused by low-quality spare parts, expired spare parts, consumable materials, or using spare parts/consumable materials not corresponding with manufacturer's requirements.

Purelogic PLD880 Specifications

General

Brand	Purelogic
Model	PLD880
Category	Control Unit
Language	English