Re: laminator, vacuum, 5-mil spirals - report
2009-03-27 by awakephd
DJ, may I ask a couple of questions about your schematic? (May I ask them even if I reveal all sorts of ignorance on my part? :) I m taking VSX-S3 near the
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Re: (Off topic) Circuit Cellar article
2009-03-27 by Andrew
... Oh how soon people forget DJGPP
Re: [Homebrew_PCBs] Re: Printer "drag shrink"
2009-03-27 by Piers Goodhew
For the record I tried and had usable-but-demanding results with noncoated ( plain-but-glossy ) 140gsm paper - I had to basically hand- scrape the last layer
Re: DJ Delorie's temperature controller
2009-03-27 by trevwhite74
Hi DJ Delorie. Thanks for the feedback. I am going to do one myself for a laminator. Those max chips are just cool. Trev
Re: [Homebrew_PCBs] DJ Delorie's temperature controller
2009-03-27 by DJ Delorie
... The thermocouple chip I used returns four samples per second, so I just did a plain less than=on/greater than=off test, once per 0.25 seconds. It keeps
DJ Delorie's temperature controller
2009-03-27 by trevwhite74
DJ Delorie, you mentioned before you did your own temperature controller for your laminator. Did you do anything special to control the temperature? Did you
Re: [Homebrew_PCBs] (Off topic) Circuit Cellar article
2009-03-27 by DJ Delorie
... *blush* Interesting fact - all the boards shown in that article (and part 2 next month) were home-brewed :-) (there, it s on-topic again ;) The main GPIO
Re: [Homebrew_PCBs] Laminators?
2009-03-26 by DJ Delorie
... The GBC-9 can NOT handle 0.62 well, and is not adjustable (temp or gap). Well, ok, *my* GBC-9 has an adjustable temperature *now* ;-)
Re: [Homebrew_PCBs] Re: laminator, vacuum, 5-mil spirals - report
2009-03-26 by DJ Delorie
... I ve run exactly one board through it so far. I ran it at 240F because that s what the film said to run it at. I did this to the laminator because the
(Off topic) Circuit Cellar article
2009-03-26 by Mike Schoenborn
The April 2009 issue of Circuit Cellar Magazine arrived yesterday, and as is my usual habit, took it to bed with me to do a little pre-sleep reading. I
Laminators?
2009-03-26 by michael tenore
HI! I am looking for a laminator to use for my Toner transfer boards! I have a lot of .062 board stock on hand plus some nice .032 stock I bought. I have seen
Re: laminator, vacuum, 5-mil spirals - report
2009-03-26 by colt.boyd@sbcglobal.net
... I think I have the same model. Would you mind sharing what temps have worked best for you at the default speed? Additionally, do you mind sharing any info
laminator, vacuum, 5-mil spirals - report
2009-03-26 by DJ Delorie
Today was the first chance I ve had to try out the new laminator and vacuum stuff. I printed a 5-mil spiral pattern for testing. Laminator: it comes up to
Re: Printer "drag shrink"
2009-03-26 by Ted Bruce KX4OM
I used paper from the Harbor Freight mailers for a few years with my Brother laser printer (ugh!). The Press n Peel Blue tech rep told me that some of the
Re: [Homebrew_PCBs] Anyone using Mentor PADS?
2009-03-26 by H. Carl Ott
... I ve been using PADS since way before Mentor bought it (also did quite a few small homebrew designs with free eval versions). I can t give you any career
Re: [Homebrew_PCBs] Anyone using Mentor PADS?
2009-03-26 by Erik Knise
I m a Seattle Robotics Society member. Richard Greenway who hosts the SRS Monday Night Chat uses it from what I remember. He is almost always on there.
Anyone using Mentor PADS?
2009-03-25 by Steve Greenfield
Anyone here using Mentor PADS? Just saw a job opening asking for experience using it, wondering if it would be worthwhile for me to download the eval version
Re: Printer "drag shrink"
2009-03-25 by mikeh_dhr
... Yes - I have used the program from a theatrical performance. It worked great. None of the ink transferred, only the toner, and the paper cam off sooo
Re:Printer "drag shrink"
2009-03-24 by RICHARD HEILIGER
I use HammerMill Color Laser Gloss paper (16311-0). This is 32 # and easily passes thru printers. The thinner paper also takes less time and pressure to
Re: [Homebrew_PCBs] Printer "drag shrink"
2009-03-24 by Piers Goodhew
This is probably something in the 10% range. What I failed to clearly express is that is only vertical (i.e. along the length of the paper) horizontally, it
Re: [Homebrew_PCBs] Printer "drag shrink"
2009-03-24 by DJ Delorie
I ve stuck the thick Pulsar paper to regular paper and sent it through my laser printers in the past. However, even on just bond paper my printers shrink the
Printer "drag shrink"
2009-03-23 by Piers Goodhew
Last night I got all geared up to start making PCB #5 - my first double-sider. As with many possibly short-lived hobbies, I m trying to do this with a minimum
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by DJ Delorie
... Sounds like vellum.
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by KeepIt SimpleStupid
The Polyester paper I used is translucent, not clear. The ink adheres extremely well. Transparency paper suffers from uniformity problems. ... From: Erik
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by Erik Knise
That looks like standard transparency paper for overhead projectors. Could you use that stuff? It s available at any office supply store. On Mon, Mar 23, 2009
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by KeepIt SimpleStupid
I haven t found another good source yet. Some of it was lying around from 20 years ago. I do know the paper I used was translucent and made from polyester.
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by DJ Delorie
... I suppose, if I could figure out how to hold the glass down. Not much extra room around the edges for screws, the box is sized to fit the glass with
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by DJ Delorie
... Hmmm... I tried using the laser printer for UV exposure, but (1) the toner didn t block much UV, and (2) the resolution was poor compared to my inkjet.
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by Stefan Trethan
If you do that you may as well stick to a sheet of foam rubber pressing the stack up against the glass and dump the vacuum. I sort of thought the whole purpose
Re: vacuum hold-down for exposure box
2009-03-23 by javaguy11111
... Along that line of thought, one thing I tried about a year or so ago was heat shrink plastic like you find wrapping music or video CD s. I bought some from
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by Harvey White
On Mon, 23 Mar 2009 14:13:13 +1100, you wrote: I d be tempted to do the following: 1) use a piece of vinyl (upholstery type) for the bottom. 2) make an odd
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by KeepIt SimpleStupid
The good part about the water method, is that it lends itself very well to double sided boards. On the outer edge drill two small holes the size of a
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by KeepIt SimpleStupid
I printed with a laser printer, so no problems. Besides the non-toner side may have been against the PC board. With a laser you can always mirror image. With
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by Piers Goodhew
Well, this thread that wont die gets you thinking: My first thought was: glass fabric board (incl. artwork and film) base to evenly remove the air between the
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by Simao Cardoso
... Maybe is a problem in my English again, but i didn t understand... I used flat word as a plane surface. Vacuum will always try bend your glass/plastic by
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by DJ Delorie
... I ve found that they re not quite flat enough.
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by Simao Cardoso
Hi, i can t really see a point in using vacuum in two rigid flat surfaces. Two glass parts seems to be used just with springs without the need of vacuum.
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by DJ Delorie
The ink didn t run? My ink isn t waterproof.
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by KeepIt SimpleStupid
What I did, was printed the layout on polyester paper and put a little bit of water between the board and the paper and exposed a sensitized board. The water s
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by DJ Delorie
... My wife found it. I m drawing about 2.5 in Hg, either with the stopper or just holding the tube in the airstream (venturi). So I built a small wooden
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-23 by William Alford
... i ve never had a problem with that in over 20 years, but since my vacuum tables have a grid of holes across the entire surface, the vacuum path is along
Re: [Homebrew_PCBs] Direct Laser PCB's (not TT)
2009-03-22 by kabowers@NorthState.net
... About 40 years ago I saw a variant on this process ( and acutally made board with it) that transferred the toner to a carrier sheet and then to the pcb
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-22 by DJ Delorie
... Except I want to image a circuit board, not a large grey blob. The ink on my films will run if they get wet. (I assume you really meant photoresist film
UV LED Scanner for PCBs (Photo Album)
2009-03-22 by warrenbrayshaw
I see in this photo album posted by dhcwat a converted scanner. Nice looking unit. This kind of device has been discussed here before and I have been put off
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-22 by Stefan Trethan
If you have a pressure gauge for 1 athmosphere you can usually open it up and bend a little piece of metal to zero the pointer at 1 and you have your vacuum
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-22 by KeepIt SimpleStupid
Just try some water between the film and the board. I ve found it works fine. [Non-text portions of this message have been removed]
Re: vacuum hold-down for exposure box
2009-03-22 by warrenbrayshaw
... Teenage vacuum gauges are susceptible to peer pressure and will go missing without explanation. Should it not return I would make an adapter for the hose
Re: [Homebrew_PCBs] Re: vacuum hold-down for exposure box
2009-03-22 by DJ Delorie
Hmmm... I m usually pretty careful to not do that, not sure how it got by me this time. Sorry.
Re: [Homebrew_PCBs] vacuum hold-down for exposure box
2009-03-22 by Stefan Trethan
Note that fabric works very well as vacuum conductor. So you could conduct your vacuum around with sheets of fabric (different sheets for different sizes of
Re: vacuum hold-down for exposure box
2009-03-22 by Steve
The trick is not to pull a vacuum in a large cavity beneath the glass, but to pull it between two sheets of glass, or between a sheet of glass and a clear