printhead assy DX6 / DX7 for Roland BN-20; RE-640; RA-640; VS; XF-640; XR-640

This print head is resistant against solvent based inks especially for Roland eco solvent inks named "Eco Sol Max". The durability of this head is 6.000.000.000 drops. After that single nozzles may not work anymore what effects worse print quality. Especially in homogenous areas you can see banding. If you replace the Roland DX7 print head we propose to replace also the damper. Dampers are small filtering systems to hold crust and sedimentary before the inks flow into the print head. Otherwise the print head would clog. This Roland DX5 print head consists of 8 lines by 180 nozzles and has 8 undependant ink channels. This is used for either 2 x 4 colours or 8 colours. The minimum droplet size is 1,5 pico litre - the maximum is 21 pico litre. nearly the same print head and spare part is used in printers from other suppliers like Mutoh and Mimaki. Using ink which is not matched for this print head may cause clogging or deforming of the nozzles. Unmatched chemical components of the ink may affect components of the print head. To replace this DX7 print head, it is necessary to have professional qualifications. It has to be done by an qualified service technician. The personnel used must be permanent, specialized, and continually trained.
This piezo-inkjet printhead assy is used in following printers:
ROLAND VS-300
ROLAND VS-420
ROLAND VS-540
ROLAND VS-640
ROLAND RA-640
ROLAND RE-640
ROLAND BN-20
ROLAND XF-640