Are this your opinion or real knowledge? Epson print heads are born to waste more ink than thermo print heads. Piezo force is much smaller then bursting ink bubbles by heating. Piezo head require constant priming even during a printing job to keep the ink flowing. Continuous stop and go printing or not makes no difference. Piezo heads need priming pretty much once every 1/4 or 1/2 inch of printing. Thermo heads do it every several sheets of printing.mikling said:piezo heads came out of industrial processes where they are better suited for continuous duty and more tolerant of variances. They are not suited very well for start and stop short burst printing where they are more wasteful of ink because of the requirement to maintain a proper meniscus on the nozzle. Maintenance routines on these require a fair amount of ink depending on the internal volume within the head.
There is virtually no wear in thermo print heads. It is the ink that is cooked, fried, baked in the nozzles that destroys it.mikling said:Thermal heads will undergo more wear and are less tolerant of varying conditons but the ability to keep the nozzle wetted ready for printing is better. As a result it wastes less ink in stop and start printing operation and maintenance routines.
It is Epson that makes its print heads inaccessible. There are industrial machines with removable piezo heads. Piezo print head clogs even in industrial continuous processes. I have seen an industrial printing machine with a piezo print head cleaning mechanism that used a cleaning agent, instead of ink, and fired the print head continuously for a couple of minutes to clean. The printer was an solvent based ink printer.mikling said:The piezo head is not as accessible as a thermal head generally. Any real deep clogs in a piezo head is subject to luck in clearing it and lots of it. ( In industrial continuous processes, there are no clog issues) Thermal heads should be considered a consumable if the print load is significant.
The concept of piezo being more industrial and thermo more consumer grade is a false illusion. HP makes and sells more industrial large format printers. Their print heads are thermo heads. They are very durable. Thermo heads are desired if you want the printing speed they offer.mikling said:Pros and cons of both depending on the required application really. If I was printing a little at a time and have extended periods of no printing, I would not recommend a piezo head. For lots and lots of daily printing, the piezo head might be a good candidate.
That was once true but as discussed in relation to the newest XP600 -> 850 printers, this is no longer the case.thanhhuy123 said:Piezo printhead: more CISS friendly, a little bit slower, accept wider range of ink type, more expensive.
Oh, I don't know that. Could you please tell me in details any significant changes? Thanks.websnail said:
There is virtually no wear in thermo print heads. It is the ink that is cooked, fried, baked in the nozzles that destroys it.