Stefan,
Apologies for the spelling of your name I was up too long...
MIS yellow was/is in all 4 cartridges, with a touch of black for
visability.
The settings for "Best Color" and "matte" were used, which puts out
quite a lot of ink. The areas of the pads in the test had noticeable
puddles, so less ink seems to be in order. Needs experimentation here.
For the jack screw I used two "L" Brackets and a 4/40 with some nuts.
allows adjustment of the left side to keep the head level across its
travel.
Trying to use the existing plastic printer base. Had to raise the head
suction assembly up to keep the head moist when not in use. Seems if
the left protrusions (head suction assembly) are set above the mount
instead of under it the height is about correct. There is a plastic
post on the right side, I drilled and threaded that post bolting the
suction device on top of a spacer. seems to work OK. I agree with you
the design pulls excess ink on startup so I did away with the pump
array. Using a syringe to purge the head.
I should have title this "First successfull ... You would get a kick
of what the first board looked like after the oven, well, cooked it.
But even then as the substrate bubbled there was success. In other
words the cured ink was flexible enough to still act as a resist under
those conditions.
Great fun! I should think this method will supplant the TT method I
have been using, much quicker, more precise with no distortion which
is a pain for the CNC drilling.
Thanks Stefan/Volkan!
John
--- In
Homebrew_PCBs@yahoogroups.com, "Stefan Trethan"
<stefan_trethan@...> wrote:
>
> On Tue, 19 Sep 2006 05:58:49 +0200, jam5411 <mardock@...> wrote:
>
> > in the photos section under JMBoard Images is a photo of my first
> > successful Inkjet PC Board! Well yes I am thrilled... This board has
> > good runs to 6 mil. 5 and 4 mill would have been OK but the runs broke
> > at the pad. Not sure but I attribute this to puddling on the pad and
> > the surface tension of the puddle tugging on the ink at the attaching
> > run, causing it to thin there.
>
> Yes, i still have similar problems. I am not sure why, but it seems
i must
> put on much more ink than Volkan. My guess is that the difference
might be
> he uses all heads and i use only black, but i'm not sure.
> Did you use the correct colors in the heads or all filled with yellow?
>
> > Quite a lot of work to get there for me. Took three different C84's
> > have found that once the heads are plugged, on some, they are REALLY
> > plugged. Soaked them in Steves potion for several weeks and still no
> > luck, and in fact am still soaking them. All of them had plugged
> > vacuum pump lines if not from the head port to the port support stand
> > then from the port support stand through the pump to the "sponge" or
> > both! The printer I used for this board still has banding in the black
> > cartridge. I programmed Dip Trace for a muddy brown which uses the
> > three color cartridges CMY when I did this board.
>
> Hm, mine cleared surprisingly well with steve's cleaner. I just
soaked the
> pad so it's full and parked the head there a while. But i guess
there must
> be heads that are too far gone.
>
> > I stripped one of the printers down to the chassis cut the chassis
> > above the feed roller as Stephan suggested, set the whole frame up
> > about .185" (4.7mm)using PC board spacers and a 4-40 jack screw on the
> > frame left side.
>
> That was a good idea, it was kinda tricky to get the height right on
the
> left for me.
>
> > Curing the MIS ink is as Stephan said critical. Amazing, the wifes
> > kitchen oven (Jennair) has a digital temperature display. Checked it
> > with the pyrometer, not only was it 20 F low it had a +-25-30 F spread
> > above and below the set point, which is all the digital display turned
> > out to be - a display of set point :). Still I used it to cure this
> > board because I could play with the temp control as the board was
> > "cured" to regulate the temp. So the next project is to modify the
> > toaster oven for curing/reflow.
>
> Yes, when you have burnt the first board because of the poor control
> you'll want that toaster...
>
> I'll need to do more boards this week.
>
> ST
>