Application Details
- This is a multiple roller ink transfer system for high speed newspaper printing machine.
- Here, the amount of ink transfer is controlled by precise and high speed Mitsubishi PLC system (replaces an Imported Controller), thereby ensuring cost effective automation system with local service backup.
- Ink delivery is controlled with precise high Frequency switching. This way, darkness of printing is controlled.
- Flexible controls for each color are used to achieve best color balance and perfect tone of printing.
Challenges & Complexities
- High speed Spray Bar operations with precise control over on time, up to 1 millisecond.
- As machine size is up to 50 meters, remote IOs are used for reduced length of cabling and installation time.
- Program is developed, in a structured modular form. Hence, gives flexibility w.r.t. Number of tower, which can be enabled/disabled through HMI.
- Various types of controls are added to this automation system to offer best performance and speed.
- Various Options and Modes are added for operator convenience.
System Layout & Network
- Touch HMI (GOT), 7” Screen
- Modular PLC with Remote IO Master
- Remote Input Module
- Remote Output Module
- Termination Resistors
Features of the Control System
- There are 4 Towers and 4 Nozzles for 4 Color printing.
- Color control by Flood setting is done by controlling high speed operations of the Solenoids.
- Spray Bars are managed in Test (Manual) Mode and Analogue (Auto) Mode.
- Individual Flood is set, as per sensed speed or overall flood also can be increased or decreased.