Re: musings on a TT press
2010-05-03 by cboy2us
... Hell, I just stole the ex girlfriend s hair-straightener, and haven t had much problems since. :) Jeremy
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Re: [Homebrew_PCBs] Resist ink pens
2010-05-03 by kimvellore@sbcglobal.net
The Chinese laser engravers have gone down in price.. I have seen some as low as $1500. The problem I see with the lasers are, they work by burning off the
Re: [Homebrew_PCBs] Resist ink pens
2010-05-03 by Andrew Villeneuve
Bob, I ve seen several tutorials on the laser engraving approach, which seems to work very reproducibly. Naturally, these all came from shops that had access
Re: [Homebrew_PCBs] Resist ink pens
2010-05-03 by Bob Butcher
I have used several similar ideas, some with more success than others. One technique I use sometimes is to polish the copper board with a Schotch Brite pae,
Re: [Homebrew_PCBs] Toner transfer problems
2010-05-03 by Andrew Villeneuve
With a lot of help from this list and a lot of experimentation, I m having much better success with my toner transfers. The process that finally ended up
Re: [Homebrew_PCBs] Resist ink pens
2010-05-03 by Leon Heller
Many years ago I used cellulose paint as resist, thinned somewhat and painted on the copper with s fine paintbrush. I used a centre punch to mark the holes
Re: [Homebrew_PCBs] Resist ink pens
2010-05-03 by Andrew Villeneuve
This is actually exactly what I was using the first time around with terrible results. I ve done a little experimentation, and gotten the industrial fine-point
Re: [Homebrew_PCBs] Re: musings on a TT press
2010-05-03 by William
... don t know what temp these kinds of presses go to but i ve been using a t-shirt transfer press with great success for years. temp goes to over 500 degrees,
Re: [Homebrew_PCBs] Re: musings on a TT press
2010-05-03 by Slavko Kocjancic
... Someone here was try to do that. But Can t be called success.,. 1. The rubber mate stinks when heated... 2. The heat up time is long as thick backplate
Re: [Homebrew_PCBs] Re: Speed control for laminator motor
2010-05-03 by Slavko Kocjancic
... There is a long forum thread at *http://tinyurl.com/3aypb4a *It s in Slovenian language but here is a lot of pictures that talk universal language... In
[Homebrew_PCBs] DLP update and help request
2010-05-03 by Mark Lerman
I can ALMOST do DLP without the external hv power supply, but it works better with a variable hv supply. It should be possible to change the voltage on the
Re: musings on a TT press
2010-05-03 by sailingto
AT $43 a laminator is less expensive and works! Don t see the need for anything for TT... Maybe I m missing something? Ken
Re: musings on a TT press
2010-05-03 by gnuvvekaavaali
... Sounds like an Electric Tortilla Maker/press -
Re: musings on a TT press
2010-05-03 by rlspell2000
Yes. I was thinking cut up a silicone baking mat: http://www.amazon.com/dp/B00009A9WU/?tag=thecelpho-20 A couple aluminum plates, some stove heating elements
Re: [Homebrew_PCBs] musings on a TT press
2010-05-03 by DJ Delorie
If you want to use a press, you need something heat resistant (but still heat conductive) yet flexible, to put between the paper and the hot plate, so that
musings on a TT press
2010-05-02 by rlspell2000
When I broke my laminator, I got disgusted and put the iron on it s highest setting and set it on the paper. This browned the paper. After letting it cool off
Re: [Homebrew_PCBs] Re: Speed control for laminator motor
2010-05-02 by Simao Cardoso
... Slavko, you are absolutely correct. In expensive laminators the rubber roller has the heater itself and they heat the board to the desired temp in a single
Re: [Homebrew_PCBs] Re: Speed control for laminator motor
2010-05-02 by Bob Huish
I am thinking of changing the circuit/code in Microchips app note AN958 to slow the motor down/ Bob H
Re: [Homebrew_PCBs] Re: Speed control for laminator motor
2010-05-02 by Slavko Kocjancic
... and little more. For now in small laminators I see just smal synchronous motor, and in one big one I see squirel cage shaded pole motor. As all of these
Re: [Homebrew_PCBs] Re: Speed control for laminator motor
2010-05-02 by Slavko Kocjancic
... If that s true then there are different laminators. I use Peach model s and Rex have same principle the heater heat parabolic curved alu extrusions and
Re: Speed control for laminator motor
2010-05-02 by awakephd
Okay, I have uploaded a file named SingleChipPWM.pdf to the Files section. It has the schematic and a brief explanation of the circuit. I have built the
New file uploaded to Homebrew_PCBs
2010-05-01 by Homebrew_PCBs@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the Homebrew_PCBs group. File : /Direct
laminator fixed
2010-05-01 by rlspell2000
Got the replacement rollers from Fellows yesterday. Ran a board after putting it back together. I only put about 1/2 of the original spring tension on the
Re: [Homebrew_PCBs] Re: Speed control for laminator motor
2010-05-01 by casy_ch@tbwil.ch
It would be nice if you could put it into the file or photo section of the group. Thank you. Jean-Claude, Switzerland ... From: Roger Blair To:
RE: [Homebrew_PCBs] Re: Speed control for laminator motor
2010-05-01 by Roger Blair
I am interested in this also, if you don t mind sharing. Thanks, Roger From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] On Behalf Of
Re: Speed control for laminator motor
2010-05-01 by rlspell2000
I you an op amp, some circuit I found on the Net. Seems to work pretty good, but doesn t have variable frequency. I would be interested in seeing your
Re: direct laser PCB
2010-05-01 by alienrelics
Yes, right here in the group in the Files section. Make a folder with a descriptive name (not your own name, please) like Direct Laser Printing or look for a
Re: Speed control for laminator motor
2010-05-01 by alienrelics
I think it is going to depend on the laminator. My wife has a large 18 inch wide laminator that uses rolls of plastic. It has heaters inside the rollers
Re: [Homebrew_PCBs] Re: direct laser PCB
2010-05-01 by Mark Lerman
For anyone interested, I ve put the controller schematic and the connections to the E260 printer on my pbase site. Is there
Re: Pizzaz pizza oven for reflow update
2010-05-01 by ae5ew
What brand and model is it? Likely a large variance between brands and models. At what temperature is it heating at? Max? Charles AE5EW
Re: Pizzaz pizza oven for reflow update
2010-05-01 by Henry Liu
Just another update: I ve had this pizzaz pizza oven for over a month and I m still very happy with it. This device I can stick my pcb on the plate and turn
need contact with listmember with thermostata
2010-04-30 by William
sometime last year someone on the list posted that they had a good stash of thermostats/relays left over from a prior occupation and would sell reasonably. i
Re: Speed control for laminator motor
2010-04-30 by rlspell2000
Yeah, I decided to forgo the speed control and reinstalled the motor. I can always add it later. BTW, my laminator has heaters inside both of the heated
Re: Speed control for laminator motor
2010-04-30 by awakephd
Slavko, my experience suggests a different understanding of what is happening. In the laminator that I am using, the heat is applied between two plates; the
Re: Speed control for laminator motor
2010-04-30 by awakephd
Richard, what kind of circuit do you have in mind for the PWM? If you re wanting to do something with discrete ICs rather than a microprocessor, I put together
Re: Speed control for laminator motor
2010-04-30 by christiansen_alex@hotmail.com
hi I can see from the last mail,that you could have had a sound sleep and make the group get the answer :) anyway.. your question on doing so to make it run
Re: [Homebrew_PCBs] Resist ink pens
2010-04-29 by michael tenore
Use fine piont CD/DVD Marker pens available at staples or even at the statioary aisle at the large pharmacies. Mike
Re: [Homebrew_PCBs] Resist ink pens
2010-04-29 by LEON HELLER
________________________________ From: Andrew Villeneuve To: Homebrew_PCBs@yahoogroups.com Sent: Wednesday, 28 April, 2010 18:18:06
Re: [Homebrew_PCBs] Speed control for laminator motor
2010-04-29 by Slavko Kocjancic
The speed controll is not right idea. They doesn t help. Even worse. When I put PCB in laminator I need aprox 6 times to repeat this to PCB get hot enought. If
Re: [Homebrew_PCBs] Speed control for laminator motor
2010-04-29 by Andrew Villeneuve
On Thu, Apr 29, 2010 at 10:36 AM, Richard Spelling ... Richard, PWM control of motors works very well - with a reasonable pulse frequency, you re for all
Re: direct laser PCB
2010-04-29 by studleylee
I ordered 2 units from Ebay, but today I got a reply saying the listing was a mistake and that they had no stock. So they refunded my Paypal. Off to Staples.
Re: Speed control for laminator motor
2010-04-29 by alienrelics
Sounds like a perfect place for a stepper motor. Steve Greenfield
Re: Speed control for laminator motor
2010-04-29 by ae5ew
Sounds as though you have painted yourself into a corner. Charles AE5EW
Re: direct laser PCB
2010-04-29 by ae5ew
Impressive. Charles AEtEW
Re: [Homebrew_PCBs] Re: direct laser PCB
2010-04-29 by favoom@earthlink.net
C Sent via BlackBerry from T-Mobile ... From: studleylee Date: Thu, 29 Apr 2010 04:29:45 To: Subject:
Speed control for laminator motor
2010-04-29 by Richard Spelling
... Hash: SHA1 Went to bed tired and annoyed I couldn t easily find a slower gear motor for the laminator. Dreamed about building a magical speed controller
[Homebrew_PCBs] Re: direct laser PCB
2010-04-29 by mlerman@ix.netcom.com
I m still experimenting with direct laser pcb. There are a lot of variables, and sometimes changing what I though was a minor detail seems to change everything
Re: [Homebrew_PCBs] Re: direct laser PCB
2010-04-29 by mlerman@ix.netcom.com
Wow - Hard to believe, but I could certainly use a spare! Mark
RE: [Homebrew_PCBs] Re: direct laser PCB
2010-04-29 by piers@u-h-p.com
i did read a how-to ... Somewhere ... about using solid ink printers to print onto fpc (just as-is, unmodified). My last job had xerox solid printers, but i
Re: direct laser PCB
2010-04-29 by studleylee
Guys, Sorry for my previous rant, I have a cold today and it has been pointed out to me that I m in a bad mood( wife ). I apologize if I stepped on anyone. I