Re: ImageWriter II quality question

2006-01-18 Thread Dan Wood
It could be a misaligned or bent pin in the print head. It'd explain the
one-off issue.

A quick way to see is to test the pins individually by printing straight
horizontal lines a pixel wide (somehow figuring out how to get each pin
to fire off) or a page of a checkerboard pattern (like the desktop for a
classic mac). A bent or loose pin will be very apparent on a pixel-sized
checkerboard pattern.

-Dan Wood


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Re: ImageWriter II quality question

2006-01-16 Thread Matthew Roskopf
Hello, I'm thinking you may have an issue with data transfer, or possibly
there are dip switches that may have gotten knocked around (don't know for
sure if you have the switches or not, but I remember that a lot of older
printers have them) It could possibly be getting a faster data rate than it
can handle, because I think I remember that that was a serial printer?
There are several speed settings you can set the printer for, and the IIgs
may have a different bandwidth than what the printer is set for (ie the dip
switches).  

I hope this information may help you.

-Matticus Roskopf

I may be young, but I work with old hardware

-Original Message-
From: Compact Macs [mailto:[EMAIL PROTECTED] On Behalf Of Nat
Hall
Sent: Monday, January 16, 2006 8:49 PM
To: Compact Macs
Subject: ImageWriter II quality question

Hi folks,

I have an ImageWriter II that's been in the family since it was bought 
new in 1988. I hope this is fair game for the list.  I used to use it 
with my Mac Plus, purchased simultaneously in 1988.

It's been in storage, and I recently got it out to use with my Apple 
IIgs.

Please bear with me here as it'll take a few paragraphs to accurately 
explain the problem.

Somewhere along the line, it has developed a problem where it 
occasionally skips a horizontal scanline.  This is manifested by what 
looks like very thin white horizontal streaks randomly throughout the 
printed page.  These transverse the entire width of the paper, and are 
only one pixel high.  This happens very randomly, sometimes it can 
print a whole page without a problem whereas the following page will 
have many of these anomalies.

Printing text with a black ink ribbon, my first thought was that I 
needed a new ink ribbon.  New ink ribbon installed = darker text, but 
the problem remains and is almost more apparent because the surrounding 
text is darker making for a bigger contrast. So my next thought was 
that there is something wrong with the tractor feed causing the feed to 
overshoot and advance the paper slightly farther than it should, 
randomly.

That was until I stuck in a (brand new) color ribbon to print a banner 
from Print Shop.  With a color ribbon, the problem is far worse.  What 
actually appears to be happening is that the printer is OCCASIONALLY 
raising the ribbon higher than it should.  Those of you who have 
experience with these printers know that magenta (red?) is below the 
yellow band on the printer ribbon.  When printing an image that should 
have been solid yellow, instead of the missed streaks, I got random 
bands of red throughout.

I am aware of the ribbon height adjuster, but I don't think this is 
an adjustment issue.  Because, as I indicated earlier, the printer can 
go as much as a whole page without problems and just randomly spits 
these out at me. A red stripe in the middle of a yellow image is hard 
to miss, no matter how you look at it.

I lubricated the hinges with machine oil that appear to pivot when the 
printer needs to change the ribbon height, but this had absolutely zero 
effect on the problem.

Anyone else had this problem?  What's the solution?  I'd really like to 
restore this printer to perfect (wishful thinking?) working order 
again, since cosmetically, it's beautiful.


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Re: ImageWriter II quality question

2006-01-16 Thread Ken
My Reply follows quote. On 16/01/2006 18:48 [EMAIL PROTECTED] said:  

Anyone else had this problem?  What's the solution?  I'd really like to 
restore this printer to perfect (wishful thinking?) working order 
again, since cosmetically, it's beautiful.
---
I suspect that one of the pins in the print head may be a bit
sticky. I have used a drop of alcohol on the print head to 
dissolve the sticky gunk that builds up followed by printing
a bunch of dark graphics to give it a workout. Sometimes
works, sometimes not so well.

Ken

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