I can't find detailed specifications for Epson print heads DX4/ DX5/ DX7. For now I have:
Epson DX4: drop size: 3,5-10,5pl (3 drop size)/ nozzels: 2x180/ Freqency: 8KHz -typical i guess at 3 drops mode (SML)
Epson DX5: drop size: 3,5-10,5pl (3 drop size)/ nozzels: 8x180/ Freqency: 8KHz - typical i guess at 3 drops mode (SML)
Epson DX7: drop size: 1,5-21pl / nozzles: 8x180
I need the correct print head frequency for different printing modes
The frequency is higher (but is not calculated with a formula) if the print head is printing only with 2 or 1 gray scale (eg: SM or S dot size at Roland printers) (DX4/ DX5).
If you know the frequency you can calculate and set the Head Speed value for optimal quality.
The major problem with large format printers is that people set the Head speed value to high, the print quality gets worse in time and the print heads quickly reduce their lifespan.
Please help. I'm working on a print heads specs database: