REPLACEMENT OF THE RELAY CONTROL SYSTEM IN AN OLD IMPORT WINDING TYPE VACUUN COATING EQUIPMENT WITH PROGRAMMABLE CONTROLLER
 
                 
                
                    
                                        
                    - 
Graphical Abstract
 
- 
Abstract
    A method to replace the relay control system of an old import winding-type vacuum coating equipment with a programmable controller(PC) is introduced. A great deal of attention is paid to the choice of the PC model and the disposition of the related hardware. The method is also suitable to the control of home-made coating equipment.
 
- 
                          
-