Drop on Demand Inkjet
A drop on demand printer or large character coder offers a total printing solution for printing on variety of porous and non-porous materials like; corrugated outer cases, trays, sacks, rubber, metal or PVC and are very reliable for printing and coding in difficult, dusty or dirty environments.
Drop on Demand Inkjet printers and Large Character coders have been developed to offer a range of Coding and Marking capabilities that are specific to end user requirements. They allow printing on a variety of materials, using water and solvent based inks. Large Character Coders use Valve-Jet technologies to print onto a variety of porous and non-porous materials
- Cost-effective print of simple date, time and text
- Easy operation and maintenance
- Self-pressured print head, which ensures ink delivery
How It Works
Drop on demand (DOD) is a broad classification of inkjet printing technology where drops are ejected from the print head only when required. The drops are formed by the creation of a pressure pulse within the print head. The particular method used to generate this pressure pulse creates the primary sub-categories within DOD, namely thermal and piezoelectric (piezo).
With piezo DOD, a piezoelectric crystal undergoes distortion when an electric field is applied. This distortion creates a pressure pulse in the ink chamber within the print head, which in turn, causes an ink droplet to be ejected from the nozzle onto the substrate.