Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Stefan Trethan
... The discussion back then was the lower edge of the board etches faster - why? probably because the bubbles hit the lower edge, but then drift away from the
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Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Stefan Trethan
... Yes, well, you like the pendulum idea, i don t like it. With the pendulum outside the tank, and magnetic traction, maybe... You do things by gut feeling
Re: Large or little bubbles
2005-12-23 by adicont2
A simple wedge shape to force ... the ... linear a ... Sorry, I m affraid I dont understand... A wedge shape ... Adrian
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Alan King
... It is a don t care item, pull it up, put on another stone for $.50, and toss the old one. Not like it d clog up that fast anyway.. ... Maybe in your mind,
Re: Large or little bubbles
2005-12-23 by adicont2
I must admit i sometimes didn t follow the rule and tried to improve things, making it much worse... Me too...;-) Adrian
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Stefan Trethan
... I keep them all in forever, no adverse effects. For a while when i ran the thing closed loop (air pump intake in tank) the mist made the pump valves stick
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Alan King
... Yes, it ll be very easy to do.. ... While this can work well by hand, a mechanical means will tend to make streaks. And a pendulum has a non-linear sweep
Re: Large or little bubbles
2005-12-23 by adicont2
I know this foamy hoses. You keep the etcher and the hose in tank when you don t use it? Or you wash all stuff, including hose after each sesion. I m worry
Re: Large or little bubbles - Centrafuge ????
2005-12-23 by crankorgan
Dave Kush is using one!!! www.buildyouridea.com ... those ... for
Re: Large or little bubbles - Centrafuge ????
2005-12-23 by lcdpublishing
Okay, so you still have to put something in the fluid. I didn t realize that and that too would be another problem - it might beat the PCB to death before I
Re: [Homebrew_PCBs] Re: Large or little bubbles - Centrafuge ????
2005-12-23 by Stefan Trethan
On Fri, 23 Dec 2005 15:34:50 +0100, lcdpublishing ... This is called a magnetic stirrer. You drop a magnet, often coated in teflon, in the glass and a rotating
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Stefan Trethan
... A diaphragm pump can be used and doesn t corrode. I m not sure which, either shurflow or flojet was recommended, look in the archives. But they are not
Re: Large or little bubbles
2005-12-23 by adicont2
I m not convinced those slots will be small enough to prevent the vapor coming out when the bubbler is on. Those slots can be sealed whith soft rubber
Re: Large or little bubbles - Centrafuge ????
2005-12-23 by lcdpublishing
I dont know how to spell it nor do I know if it is the thing I am thinking of.... There are these machines used for mixing chemicals. You see them in all
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Stefan Trethan
I m not convinced those slots will be small enough to prevent the vapor coming out when the bubbler is on. I see what you mean, my idea for the moving tube is
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Alan King
... Yes, got that part of the idea but a simpler motion system will be easier.. ... But that will require something else to do moving, and rotary to linear
My first test board
2005-12-23 by Greg W:-)
I have just uploaded a pik for the groups viewing pleasure :-D -- All Albums | Photo Albums Onegammyleg It is the bar code off my power bill. Quite good
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Stefan Trethan
I don t think there is a easy way to get better uniformity. A spray etcher may not be that much more complicated in the end. For now i m satisfied with what i
Re: Large or little bubbles
2005-12-23 by adicont2
... groundplane ;-) We must learn this: suction cup is a verry good ideea to make huge pads ;-) I refer to a one side board. You are wright, this system is not
Re: [Homebrew_PCBs] Re: Large or little bubbles
2005-12-23 by Stefan Trethan
... You better have one very large pad in that place than, or a groundplane ;-) ... The rotating thing might be a OK idea. if anyone is going to experiment
Re: Large or little bubbles
2005-12-23 by adicont2
... I thought about ... through ... chamber ... I see a comercial tank made it in this way, whith very short standoffs, so a little chamber. Gluing the tubes
Re: [Homebrew_PCBs] Large or little bubbles
2005-12-22 by Alan King
... I d guess larger bubbles gives greater displacement, so higher velocity for the etchant as it comes back in as the bubble passes.. ... That could be
Re: Water Soluble Paper
2005-12-22 by lcdpublishing
... it. ... I am not at all convinced one paper is better than another. During the last few months I have been using up some glossy HP Inkjet paper. It s
Re: Large or little bubbles
2005-12-22 by soffee83
I m also using two small bubble makers on a dual outlet pump, but haven t had a chance to get much tank use yet. They re the kind with the fuzzy looking
Re: Large or little bubbles
2005-12-22 by adicont2
Bubbles must cover entire surface of the board. So I must made many large holes in the tube, something like 1mm diameter whith spaces about 10mm or less. You
Re: Water Soluble Paper
2005-12-22 by mikezcnc
The simplest way to understand it is to buy that paper and test it. Then let us know. The paper is cheap, you said, right? Mike
Re: Maximizing toner transfer paper use, REVISITED
2005-12-22 by Richard
Hi I m in the UK and use the TT method / HP 4L laser printer & a hot iron (steam setting without the steam :) - never looked back. I ve used many brands of
Re: [Homebrew_PCBs] Large or little bubbles
2005-12-22 by Stefan Trethan
Larger bubbles are supposedly required to get good scrubbing action at the surface of the PCB. However, with my small air pump i could not produce enough large
Re: Water Soluble Paper
2005-12-22 by scratch_6057
... it ... nothing ... I have not etched with it but Toner out of my HP 4 on Staples Photo Paper is the same as Toner out of the same printer on this stuff
Re: [Homebrew_PCBs] Re: The verdict on the quiet Dremel?
2005-12-22 by Alan King
... Just got the new $25 B&D from Walmart. While I was expecting to take a look, it not be any better than the Handi, and take it back, heck if it isn t
Large or little bubbles
2005-12-22 by adicont2
I search messages arhive on this subject and no concludent result. Opinions are very diferent: 1mm holes at 2,5 mm space-large bubbles or aquarium tipe aerator
Re: Water Soluble Paper
2005-12-22 by mikezcnc
Have you tried it? Try it and let us know. First, that paper is not cheap and second it transfers 100% of image... all of it. White and black. Means nothing is
Re: [Homebrew_PCBs] Re: Maximizing toner transfer paper use, REVISITED
2005-12-22 by Mike Young
... From: scratch_6057 ... Define them in the CAM processor. File|CAM Processor... Define a new job, and then define a section in
Re: Maximizing toner transfer paper use, REVISITED
2005-12-22 by scratch_6057
... Four passes? ... Yes that is the idea with what I presented in that message. ... Yea, I have a copy of the full version of Adobe Acrobat 4.0 (old I know
Water Soluble Paper
2005-12-21 by scratch_6057
Yet ANOTHER Toner Transfer Paper Suggestion Paper that dissolves in water! (actually I think it is some sort of starch based stuff with binding fibers.) This
Re: [Homebrew_PCBs] Maximizing toner transfer paper use, REVISITED
2005-12-21 by Evan Dudzik
I export each layout to a bitmap with eagle, at 600 dpi which is my printer s resolution, that makes it exactly the right dimensions... then import it into
Re: [Homebrew_PCBs] Re: The verdict on the quiet Dremel?
2005-12-21 by Alan King
... Well definitely wait until I try out the newer one. Then if it s bad I d say hunt for the old grey Walmart one, it has the dial, and was the reason I went
Re: [Homebrew_PCBs] Maximizing toner transfer paper use, REVISITED
2005-12-21 by Mike Young
... From: scratch_6057 ... I doubt this link will do any better. Probably an issue with Yahoo logins and cookies, rather than
Re: The verdict on the quiet Dremel?
2005-12-21 by soffee83
Thanks again Alan! The blue version is around (used). They all have sort of a weird shape, but I guess if I do the body mounted standoffs like yours, it
Re: Maximizing toner transfer paper use, REVISITED
2005-12-21 by soffee83
I think you can also export to a standard image file as opposed to printing. This should allow you to manipulate and paste it in whatever program you want.
Re: [Homebrew_PCBs] Re: The verdict on the quiet Dremel?
2005-12-21 by Alan King
... Never can tell, the new one could be even better. Might try and swing by my Walmart today, and see what they have. If it s anywhere near the $19 I paid
Hinari Tiny Top toaster oven
2005-12-21 by Leon Heller
I picked up my Hinari toaster oven from the Eastbourne Argos showroom this afternoon. It looks like it should form the basis of a good reflow oven, especially
Maximizing toner transfer paper use, REVISITED
2005-12-21 by scratch_6057
On Wed Nov 2, 2005 7:06 pm Mike Young asked, ( snip ) In the freebie Eagle, is there a way to print, for toner transfer, more than one image per page? I m
Re: [Homebrew_PCBs] PCBs
2005-12-21 by lists
In article , ... Large Austrailian based company - they are a major carrier in the uk.
Re: The verdict on the quiet Dremel?
2005-12-21 by soffee83
Much thanks for the images! I didn t realize that thing was actually a B&D. It looks old yet familiar. We have a B&D service center here that may be able to
Re: [Homebrew_PCBs] Re: The verdict on the quiet Dremel?
2005-12-21 by Alan King
... http://images.amazon.com/images/P/B0000302V5.01.LZZZZZZZ.jpg and a Handi Works Rotary Tool MHW550 (which cost the least and I like the best).
Re: [Homebrew_PCBs] Re: PCBs
2005-12-21 by Leon Heller
... From: Alan King To: Sent: Wednesday, December 21, 2005 4:46 AM Subject: Re: [Homebrew_PCBs] Re: PCBs ...
Re: [Homebrew_PCBs] Re: PCBs
2005-12-21 by Alan King
... No problem, figured it might be just the quoting.. http://www.modellights.com/images/temp/pcb1.jpg http://www.modellights.com/images/temp/pcb2.jpg
Re: [Homebrew_PCBs] Re: PCBs
2005-12-21 by bill afanaseff
sorry i wasnt clear at all, i meant where you had your boards made :) ... From: wpafan To: Homebrew_PCBs@yahoogroups.com Sent: Tuesday, December 20, 2005 5:30
Re: [Homebrew_PCBs] Re: PCBs
2005-12-21 by Alan King
... http://www.tnt.com/ There s TNT, and just in case you happened to want the PCB too, here is one of their Ebay auctions.. Apparently TNT is rather large in