Re: filmscanners: A Good Epson Customer Service Story

[Arthur Entlich <artistic@ampsc.com>]

I think there is a lot of confusion about the way Epson printers work, 
in terms of the nozzles and print heads.

I don't think the smaller dots are completely as a result of smaller 
nozzles. For instance, the Stylus 900 has the ability to produce the 
smallest droplet of any of their printers, at 3 picolitres.

The 900 however, actually produces 6 different droplet sizes, 3, 10, 11, 
19, 23 and 29 picolitres.  To do this, I'm sure the nozzles were reduced 
somewhat in size, but also the dot size relates to the frequency the 
quartz crystal vibrates at, and the number of cycles the printer remains 
at one exact location on the paper.

As far as I can determine, the nozzle size shouldn't be a big problem 
with the newer pigmented inks.  In fact, upon questioning Epson about 
the differences between the 7000 (dye) and 7500 (pigmented) printers, I 
was told the heads were identical, but that the pressure valves were 
adjusted due to some differences in viscosity of the inks.  Also, at 
least in the 7000, the inks are charged opposite.  So, it is probably 
wise to use a cleaning cart between switching from dye to pigmented 
inks.  With the cart based systems, the ink chamber in the head is 
relatively small, so a flush would be very long a process, but with the 
large format printers, all the lines would need to be flushed, which 
could be quite a job.  I also expect with the smaller printers with the 
cart above the heads, the viscosity differences in the ink would be less 
of an issue than when there are lots of tubes and the ink has to travel
for feet.

Art

tflash wrote:

> But don't most of the Epson printers that use their archival inks have
> larger droplet print heads than the dye based versions. I don't know if I'm
> correct about this or not, but if so I'd fear lots of print head clogs.
> 
> Todd
> 
> 
>> Jerry & Steve
>> Thanks for setting me straight - may give this a try. Have either of you 
>tried
>> this?
>> ô¿ô
>> Mike
>> 
>> ----- Original Message -----
>> From: "Mystic" <Mystic@hawaii.rr.com>
>> To: <filmscanners@halftone.co.uk>
>> Sent: Thursday, May 10, 2001 19:19
>> Subject: Re: filmscanners: A Good Epson Customer Service Story
>> 
>> 
>> If I remember correctly, the 2000P Color Cart is 3 color vs. 5 for the 1270
>> 
>> MIke
>> 
>> ----- Original Message -----
>> From: "Arthur Entlich" <artistic@ampsc.com>
>> To: <filmscanners@halftone.co.uk>
>> Sent: Tuesday, May 08, 2001 21:40
>> Subject: Re: filmscanners: A Good Epson Customer Service Story
>> 
>> 
>> Some of you 1270 owners might be interested in something I picked up at
>> a web site which deals with ink refilling.
>> 
>> Apparently, the 1270 and 2000P color cartridge (Don't know about the
>> black) is the same shell. However, when if you normally try to put a
>> 2000P cart into a 1270 it shows up as being empty (via info from the
>> chip). One person claimed that by using the trick to re-write the chip
>> using a brand new Epson cartridge, he was able to trick his 1270 to
>> think it had a 1270 color cart in it, when actually it had the 2000P
>> cart in it.  He claims to be happily printing away with the 2000P cart
>> in his 1270.