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User’s Manual   

For

 

 

MD2278 

High Performance Microstepping Driver

 

Version 1.0 

©2000 All Rights Reserved

 

 

Attention: Please read this manual carefully before using driver!

 

 

 

 

 

 

                                                                                                                                                     

The

 

content in this manual has been carefully prepared and is believed to be accurate, but no 

responsibility is assumed for inaccuracies. 
 

FULLING

 reserves the right to make changes without further notice to any products herein to 

improve reliability, function or design. 

FULLING

 does not assume any liability arising out of the 

application or use of any product or circuit described herein; neither does it convey any license 
under its patent rights of others.   
 

FULLING

’s general policy does not recommend the use of its products in life support or aircraft 

applications wherein a failure or malfunction of the product may directly threaten life or injury. 
According to 

FULLING

’s terms and conditions of sales, the user of 

FULLING

’s products in life 

support or aircraft applications assumes all risks of such use and indemnifies 

FULLING

 against all 

damages. 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Summary of Contents for MD2278

Page 1: ...bility function or design FULLING does not assume any liability arising out of the application or use of any product or circuit described herein neither does it convey any license under its patent rights of others FULLING s general policy does not recommend the use of its products in life support or aircraft applications wherein a failure or malfunction of the product may directly threaten life or...

Page 2: ... voltage AC80 250V TTL compatible inputs Automatic idle current reduction Output current up to 7 8A peak RMS 5 57A Input frequency up to 400KHz Opto isolated inputs Microstep resolution pulse per rotation selectable vary from 400 500 600 800 1000 1200 1600 2000 2400 3200 4000 5000 6000 6400 8000 and 10000 Suitable for any 2 phase stepping motor with 4 6 8 leads DIP switch current setting CW CCW mo...

Page 3: ...A Enable signal this signal is used for enable disable high level for enabling driver and low level for disabling driver Usually left unconnected enabled READY Output alarm signal positive READY is a photocouper output from open collector circuit effectively output when driver operate normally maximum permitted input voltage 30VDC maximum output current 20mA generally can be serial connected to PL...

Page 4: ... output current Figure 4 8 Lead Motor Series Connections M MD D2 22 27 78 8 H Hi ig gh h P Pe er rf fo or rm ma an nc ce e M Mi ic cr ro os st te ep pp pi in ng g D Dr ri iv ve er r V V1 1 0 0 7 Parallel Connection An 8 lead motor in a parallel configuration offers a more stable but lower torque at lower speeds But because of the lower inductance there will be higher torque at higher speeds Multip...

Page 5: ...nce Maximum Voltage Input The power MOSFETS inside the driver can actually operate within 80 220VAC including power input fluctuation and back EMF voltage generated by motor coils during motor shaft deceleration Higher voltage will damage the driver Therefore it is suggested to use power supplies with theoretical output voltage of no more than 220V leaving room for power line fluatuation and Back ...

Page 6: ...ly sufficiently high supply voltage for intended applications Setting Proper Output Current a For a given motor higher driver current will make the motor to output more torque but at the same time causes more heating in the motor and driver Therefore output current is generally set to be such that the motor will not overheat for long time operation b Since parallel and serial connections of motor ...

Page 7: ...d short circuit protection To improve reliability the driver incorporates a number of built in protections features a Over voltage protection and short voltage protection When power supply voltage exceeds 250VAC protection will be activated and power indicator LED will turn red When power supply voltage is lower than 80VAC the driver will not works properly b Coil ground Short Circuit Protection P...

Page 8: ...end user During the warranty period FULLING will either at its option repair or replace products which prove to be defective EXCLUSIONS The above warranty shall not apply to defects resulting from improper or inadequate handling by customer improper or inadequate customer wiring unauthorized modification or misuse or operation outside of the electrical and or environmental specifications for the p...

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