Re: Ferric Chloride
2008-06-26 by pcb.easy
... Radio Shack said check on Tuesday when they get there stock shipments. But I had the impression they may not carry the product anymore. Also I believe it
Messages
Browse messages
Page 296 of 707 · 35337 messages matched
Re: Home Built InkJet PCB printer?
2008-06-26 by javaguy11111
You can also take a look at this site as well. http://www.bioinformatics.org/pogo/ They built theirs for a microarrayer, but the cartridge is from an Epson
Re: Ferric Chloride
2008-06-26 by Ben
... went there this weekend and the store doesn t have it in stock and the wearhouse is out. Think there not stocking it anymore? ... Don t know where Local
Home Built InkJet PCB printer?
2008-06-26 by Wayne C. Gramlich
For a while Parallax was selling a stand alone ink jet print head. I always wondered if anybody tried it out on a PCB. I can t find the product on the
Re: [Homebrew_PCBs] Re: inkjet resolution (was: UV LED box)
2008-06-25 by DJ Delorie
... Tried that. The nozzle check dots are HUGE compared to the ones used at 2880 DPI. I m guessing they re printing bars, not dots, to make them visible.
Re: inkjet resolution (was: UV LED box)
2008-06-25 by Steve
... Use the print head alignment check or nozzle check, that will print one line using one nozzle. That should give you some indication of how straight one
Re: [Homebrew_PCBs] Re: inkjet resolution (was: UV LED box)
2008-06-25 by Adam Seychell
... I d reckon you need to write your own printer firmware, or built your own controller hardware. I d imagine there would be a lot of printer settings you
math check
2008-06-25 by DJ Delorie
someone check my math and assumptions, please... I have 3l of etchant (HCl/H2O2) on its way to a CuCl etchant. To get the specific gravity from 1.0 to 1.2,
Re: [Homebrew_PCBs] Re: Ferric Chloride
2008-06-25 by DJ Delorie
... See also http://members.optusnet.com.au/~eseychell/PCB/etching_CuCl/ I ve been trying to get set up to do this, but it seems that the starter etchant has
Re: Ferric Chloride
2008-06-25 by Lee Studley
I ve been looking at the link a member share recently: http://www.instructables.com/id/Stop-using-Ferric-Chloride-etchant!--A-better-etc/ What do you guys
Re: [Homebrew_PCBs] Re: inkjet resolution (was: UV LED box)
2008-06-24 by DJ Delorie
... The host software, or the printer s software? I control the host software... I suspect it s imprecision in the print head mechanics. It just can t fire a
Re: [Homebrew_PCBs] Re: inkjet resolution (was: UV LED box)
2008-06-24 by Adam Seychell
... Unfortunately for us PCB homebrewers , inkjet manufactures are not going to optimise their products for highly accurate and fine line image artwork. The
Re: Ferric Chloride
2008-06-24 by javaguy11111
That is where I bought my etchant from. Just be aware that you need to be very careful mixing the dry etchant with water. A lot of heat gets generated as you
Re: Ferric Chloride
2008-06-24 by bob_ledoux
Try All Electronics: $6.25 for a quarter pound. http://www.allelectronics.com/make-a-store/item/ER-3/DRY-CONCENTRATED-ETCHANT/-/1.html ... went there this
Re: [Homebrew_PCBs] Re: inkjet resolution (was: UV LED box)
2008-06-24 by DJ Delorie
... No, Linux. I ve got the sources for all the printer drivers :-) (and the gutenprint project publishes a spec for the ESCp2 codes my printer uses)
Re: inkjet resolution (was: UV LED box)
2008-06-24 by dandumit
... I am very curious about your program. How do you plan to wrote it ? Are you printing form Windows ? I mean I have seen a guy in this group that was
Re: Ferric Chloride
2008-06-24 by Dennis
Hi John, ... Radio Shack said check on Tuesday when they get there stock shipments. But I had the impression they may not carry the product anymore. Also I
Re: [Homebrew_PCBs] Ferric Chloride
2008-06-23 by Harvey White
... About right, IIRC. If you can get it. A gallon is about 30 dollars from on line sources + about 8 dollars delivery. A gallon has lasted me about a year,
Re: [Homebrew_PCBs] Ferric Chloride
2008-06-23 by John Michaud
Thanks - I m in the Portland OR area - and ya the manager of that Radio Shack said check on Tuesday when they get there stock shipments. But I had the
Re: [Homebrew_PCBs] Ferric Chloride
2008-06-23 by Harvey White
... Depending on the store, you will be told that either 1) we stopped carrying it; 2) we don t know what it is; 3) that s a catalog item; and 4) what do you
Re: [Homebrew_PCBs] Ferric Chloride
2008-06-23 by H. Carl Ott
... I usually get it dry from ebay or http://www.mpja.com/prodinfo.asp?number=16384+DT Not sure where local is, but if you are trying to avoid mail order, it s
Re: [Homebrew_PCBs] Ferric Chloride
2008-06-23 by Leon
... From: John Michaud To: Sent: Monday, June 23, 2008 9:57 PM Subject: [Homebrew_PCBs] Ferric
Ferric Chloride
2008-06-23 by John Michaud
Has anyone been to Radio Shack lately looking for Ferric Chloride? I went there this weekend and the store doesn t have it in stock and the wearhouse is out.
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by Leon
... From: DJ Delorie To: Sent: Monday, June 23, 2008 8:29 PM Subject: Re: [Homebrew_PCBs] UV LED box ... My
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by DJ Delorie
... The laser printer (3 steps) uses toner. The inkjet is an Epson R280, with the claria dye-based ink. So far I ve only tested the black ink (8 steps). I
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by Mike Young
Well that just s*cks. :D The Epson 1280 has been sitting idle for about 2 years now. It would be simpler to replace it than try to clean out the print heads.
Re: [Homebrew_PCBs] inkjet resolution (was: UV LED box)
2008-06-23 by DJ Delorie
... Actually, that s not what I see. There seems to be a gaussian distribution of off-bys in both directions (vertical and horizontal). If I enable
inkjet resolution (was: UV LED box)
2008-06-23 by Adam Seychell
... Thats what I have observed too. If you look at it under a microscope then you can clearly see that line edges parallel to the print head travel axis are
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by DJ Delorie
... Done. Only one step was useful; the one above it was completely etched away and the one below it had shorts. Also, the vellum itself took three steps of
Re: [Homebrew_PCBs] Re: UV LED box
2008-06-23 by DJ Delorie
... Yup. However, the software I use for printing doesn t put down as much of the colored ink as it does for black, so I need to resolve that first.
Re: UV LED box
2008-06-23 by warrenbrayshaw
... As has been often posted here. The UV transparency of each inkjet colored ink is different. Next test could be CMY tests to confirm if black or black made
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by DJ Delorie
... Still etching, but it looks like it only gives 3 steps of useful range, vs 8 steps for the inkjet. Under a microscope with back-lighting, the toner is not
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by DJ Delorie
... My dad always told me to check the stupid things first. Yes, it s obvious. Yes, I checked it anyway ;-) ... The artifacts are on the scale of a pixel or
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by John Coppens
On 22 Jun 2008 20:12:24 -0400 ... This is probably too obvious, but still... (At least) some printer drivers, when fed with gray scale images, use (random dot)
Re: [Homebrew_PCBs] UV LED box
2008-06-23 by DJ Delorie
... The disadvantage of laser printers (at least, based on looking at it under a microscope) is that it s made of dry particles, so you don t get a smooth
Re: [Homebrew_PCBs] UV LED box
2008-06-22 by Leon
... From: Mike Young To: Sent: Monday, June 23, 2008 12:28 AM Subject: Re: [Homebrew_PCBs] UV LED box
Re: [Homebrew_PCBs] UV LED box
2008-06-22 by Mike Young
Has anyone measured the UV transmissive density of their artwork? One would think Laserjet toner should be opaque enough , and dye-based ink jets will have
Re: [Homebrew_PCBs] UV LED box
2008-06-22 by DJ Delorie
... I did one of these tests. I used 8x the ideal time, because my timer only goes to 60 minutes. So I ran for 44 minutes. Here s a scan of the board
Re: [Homebrew_PCBs] UV LED box
2008-06-22 by DJ Delorie
... If you had been following the discussion, you would have known that I *included* those items in the test exposures, so I *am* compensating for loss through
RE: [Homebrew_PCBs] UV LED box
2008-06-22 by Bertho Boman
I am a little surprised at the long discussions about selecting exposure for just the photo resist. To me that is artificial and not real life. To make PCBs,
Re: [Homebrew_PCBs] UV LED box
2008-06-22 by Russell Shaw
... The way i checked mine is to expose a series of areas, where each is 30s longer than the last. I selected a time that was beyond where there was no visible
Re: [Homebrew_PCBs] UV LED box
2008-06-21 by DJ Delorie
... More like some parts come completely off, and other parts remain intact. I guess the parts that remain could be thinner, but I didn t check. ... Yes.
Re: [Homebrew_PCBs] UV LED box
2008-06-20 by Adam Seychell
... Thanks, I get it now. I have been doing it wrong all this time. Previously, I would estimated exposure purely on the appearance of the film after
Re: [Homebrew_PCBs] UV LED box
2008-06-20 by DJ Delorie
... If it were my film, I d need to expose my boards for 480 seconds, the equivalent of holding step 8. ... No. I think you re misunderstanding what the step
Re: [Homebrew_PCBs] UV LED box
2008-06-20 by Adam Seychell
... thanks, its getting a bit clearer now. So lets say your test expose for 120 seconds with the step gauge and full cure occurs at step 4. The level of UV
Re: [Homebrew_PCBs] UV LED box
2008-06-20 by DJ Delorie
... That s my next test. So far, I ve tested my system with the LEDs, glass, transparencies, and film I ll be using. The only thing missing was the ink, but
Re: [Homebrew_PCBs] UV LED box
2008-06-20 by DJ Delorie
... Yes. 1 to 4 were fully exposed; they got enough UV to cure. Recall this is a negative resist, transparent = UV = cure = copper. Steps 6 through 21 were
RE: [Homebrew_PCBs] UV LED box
2008-06-20 by Bertho Boman
Testing the photo resist by itself might be interesting but what really needs to be done is to test the system. Add your artwork and any hold down glass or
RE: [Homebrew_PCBs] UV LED box
2008-06-20 by Bertho Boman
Are there any reasonably priced real UV (about 350nm) diodes available suitable for an exposure box? Any suggestions? TIA Bertho [Non-text portions of this
Re: [Homebrew_PCBs] UV LED box
2008-06-20 by Adam Seychell
... I m still confused :) Ok. so when you exposed the resist for 2 minutes with the step gauge in place, then what you observed at step 5 was slightly