Hello Radek,
I've found that the HP printers tend to do "outlines" of theprinted images, with the centers either completely empty or poor quality.One thing I tried that worked pretty well was to cover the copper withsome Mispro Yellow ink. I just smeared pit on and let it dry. The printerworked much better! In fact, I found that you can dilute the Mispro even10:1 and it would still work. The Oki might need the sametreatment.
Mark
At 07:52 AM 8/13/2014, you wrote:
Hello Mark!
I read that was previously perform a many number of attempts over thetransfer of toner powder on the plate.
eg. voltage changes, gel XY
I currently have very old printer OKIPAGE 10ex and prepared machanics todirect toner transfer, but have problem with quality of traces on copper.Toner is unevenly distributed, some parts are almost transparent. Edgesare OK.
Have not tried etch, yet.
On regular paper prints are good quality - solid black large areas andsharp edges.
Already i have toner powder replaccement. Before i try to buy originaltoner powder i have a question:
Do You try some metods to improve covering boards by toner powder?Special chemical or mechanical copper board pre-(or post-)preparation?
Great job with E260 (both versions- I read all carefully)!
--
Radek
2014-08-10 14:13 GMT+02:00 Mark Lermanmlerman@...[Homebrew_PCBs]<Homebrew_PCBs@yahoogroups.com>:
- Â
- No, I have no need for traces that fine, but now that I have a stable"platform" I want to test the limits. Once I get the MCUversion online I am going to work on double sided boards.
- Mark
- At 05:56 AM 8/10/2014, you wrote:
- 5/5 is better than most cheap board houses would advertise (6/6 isfairly typical). Ã Do you really need to get down to that? Ã 8/8 iswhat most people strive to achieve at home.
- On Sat, Aug 9, 2014 at 9:01 AM, Mark Lermanmlerman@...[Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
- ÃÂ
- Still waiting for some parts for the MCU version,l but I just ran a
- test board and found:
- 1 - All 5 mm traces are intact.
- 2 - 5 mil traces/10 mil spaces works perfectly - no shorts, no open
- traces, no "near misses".
- 3 - 5/5 does not. The traces are intact but they spread into the
- spaces and short together in many areas. The obvious conclusion is
- that the traces are wider than 5 mil.
- One solution might be to make the traces even thinner so if they
- spread it won't obliterate the spaces.
- What I need is a good way to measure the thicknesses. I do have a
- stage micrometer for my microscope, but I really would like a USB
- microscope with software to measure. Does anyone have asuggestion?
- I could also use a test pattern that has a variety of traces/spaces.
- Does anyone have one in some common format?
- Thanks for your encouragement and suggestions.
- Mark