Cwd856 New Generation Hybrid Servo Driver, Stepping Motor Driver, DC 80-130dac

• Application: Nc Machine Tool
• Speed: Constant Speed
• Number of Stator: Two-Phase
• Excitation Mode: HB-Hybrid
• Function: Control
• Type: Magnetic-Electric
• Model NO.: CWD856
• Certification: ISO9001, RoHS&CE
• Brand: Smart Automation
• Voltage: 80-130dac
• Current: 8.0A
• Transport Package: Standard Export Package
• Specification: CWD860H
• Trademark: Smart Automation
• Origin: China
• HS Code: 8503009090
• Production Capacity: 10000 PCS Per Month

Product Description

CWD856 Closed Loop Stepping System 

1.Introduction

Descriptions
CWD856 is a new generation hybrid servo driver, it uses the 32-bit DSP processor, the internal integrates the technology of the anti-resonance, low noise, micro-step, low temperature rise ,so that dramatically improve the performance of the stepper motor,with some characteristics of low noise, small vibration, low temperature and high-speed torque . The driver's interior use the adaptive PID technology, without manual adjustment can automatically generate the optimal parameters for different motor, the motor runs to achieve the best performance.
Drive voltage is DC 80-130DAC, for various types of two-phase hybrid closed loop stepping motor which current is less 8.0A , with automatic semi-flow, self-test, over-voltage, under-voltage and over-current protection.
Features

1. high-performance, low price ;
2. Placed inside micro-step;
3. Automatic semi-flow when stops;
4. Optically isolated signal for input / output;
5. Impulse  response frequencies up to 200KHz;
6.  Low temperature rise, low vibration;
7. online adaptive PID technology.

Applications
CWD856 is a low-cost, high-performance servo systems, suitable for a variety of large-scale automated equipments and instruments, such as low-cost, low vibration, noise, high-precision, high-speed devices, And it is ideal for applications where the equipment uses a belt-drive mechanism or otherwise has low rigidity and you don't want it to vibrate when stopping. 
 Electrical Specifications

Parameter	Min	Typical	Max	Unit
Input Voltage(DC)	20		80	VDC
Output Current	0	-	5.6	A
Pulse Signal Frequency	0	-	200	KHZ
Input Signal Current	7	10	16	mA

2.Parameter settings

Current setting

Peak	RMS	SW1	SW2	SW3
Default		off	off	off
2.1A	1.5A	on	off	off
2.7A	1.9A	off	on	off
3.2A	2.3A	on	on	off
3.8A	2.7A	off	off	on
4.3A	3.1A	on	off	on
4.9A	3.5A	off	on	on
5.6A	4.0A	on	on	on

Semi-flow settings
Users can set the semi-streaming capabilities of driver through SW4 . OFF indicates half the quiescent current to dynamic current, 0.5 seconds after the  pulse stops current automatically reduced to half; ON represents the static and dynamic current is the same current. SW4 should be set to OFF, so that the drive motor to reduce heat and improve reliability.



Subdivision Setting
 

Subdivision	SW5	SW6	SW7	SW8
Default	on	on	on	on
800	off	on	on	on
1600	on	off	on	on
3200	off	off	on	on
6400	on	on	off	on
12800	off	on	off	on
25600	on	off	off	on
51200	off	off	off	on
1000	on	on	on	off
2000	off	on	on	off
4000	on	off	on	off
5000	off	off	on	off
8000	on	on	off	off
10000	off	on	off	off
20000	on	off	off	off
40000	off	off	off	off

3.Interface wiring instructions
Control signal Connector(CN1)

Signal	Function
PUL+	Pulse signal positive	Pulse signal control the motor to run, each pulse make motor running one step.
PUL-	Pulse signal negative
DIR+	Direction signal positive	Direction control signal to control the direction motor running.
DIR-	Direction signal negative
ENA+	Enable signal positive, usually left unconnected(enable)	Motor  is offline, no internal current enable signal is active.
ENA-	Enable signal negative, usually left unconnected(enable)

Strong electrical interface

GND	DC power supply ground
+VDC	DC power supply positive.+20V~+80VDC.
A+	The A phase of two-phase stepper motor
A-
B+	The B phase of two-phase stepper motor
B-

The interface circuit of control signal






4. Problems and Solutions

problems	Possible cause	solutions
Motor is not rotating	No power supply	Check the power supply
	No control signal	Check the control signal
	The driver is disabled	Don't connected the enable signal or enable the driver
ALM lights flashing	Supply voltage is too high or too low	Check the supply voltage
	Motor line wrong connect	Check the motor wiring
	Encoder line wrong connect	Check the encoder wiring
	Motor line short-circuit	Check motor lines eliminate the short-circuit
	Motor or drive failure	Replace the motor or drive
	Lose step	Restart driver
Inaccurate Position	The Micro steps set incorrectly.	Set the correct segments
	Control signal is interfered	Eliminate interference
Motor Stalled	Power supply voltage too low	Increasing the supply voltage
	Accelerating time is too short.	Extend the acceleration time