Homebrew PCBs

I have a Pan American Tool cobalt drill set.  Like yours, real cobalt steel,
not Chinese stuff, but not TiN coated.  What brand of drills do you have?

 

Tektronix over Agilent and Lecroy? Just kidding;)  

 

Jeff

 

  _____  

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
On Behalf Of smilingcat90254
Sent: Tuesday, January 08, 2013 10:29 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Re: photo resist. Slightly different material.

 

  

Yes E-bay is cheaper.

At Capefear, cost for 10' x 24" film is $59.00 with S/H I think it was. they
have much smaller size for sampling but it is pretty pricy!! $19 for 12" x
24". 

I pay premium over E-bay because I prefer to have a "regular" supplier. It's
the reason I order from DigiKey, and buy Tektronix and HP equipment. 

My sample order from Capefear came very prompt. Well packed, looking very
reputable. 

I do not care for grey market items or suppliers where you can't trace back.


As a reference of how I view things: Some of my cutting tools are cobalt
steel with TiN coated material. Not some high carbon steel. Tools
themselves, I prefer Dewalt, Bosch, Makita... Prefer it is MADE IN USA or
Germany or Japan and not just the label saying USA/German/Japanese company.
Most recent outburst was over 6-32 tap. Ordered a replacement tap. Broken
one was a cheapie from Craftsman high carbon steel. Flute on the tap was cut
so irregular, one of the cutting surface was less than 1/32" wide.
Replacement is a cobalt steel, TiN coated 6-32 H3 tap from Ghurring. cost is
about $15.00 each.

Been looking for a lathe and mill and I think I'm going to invest in Taig.
Not so hot on Smithy or Grizzly. Both are not that accurate. I used Smithy
and wasn't impresed. Even their technical spec was bit of a yawn. 

smilingcat,

--- In Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com> , "Jeff Heiss" wrote:
>
> 
> http://www.polymetaal.nl/siteUK/shopukwork/en-gb/dept_183.html
> 
> 
> 
> The price is on the bottom of the page. The cost is 24" x 10' for $78 (60
> Euro). It costs 5.4 times as much as photoresist available on Ebay. I
> computed 5.4x using the resist I purchased which is 8.3" by 9.7' DuPont
> MM540 for $14.49.
> 
> 
> 
> Jeff
> 
> 
> 
> _____ 
> 
> From: Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com>
[mailto:Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com> ]
> On Behalf Of Rick Sparber
> Sent: Tuesday, January 08, 2013 8:40 PM
> To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>

> Subject: RE: [Homebrew_PCBs] photo resist. Slightly different material.
> 
> 
> 
> 
> 
> Ms. Smilingcat,
> 
> It looks like very interesting stuff. What bothers me is they said
> "affordable price" yet don't list the price. That usually means it ain't
> that affordable. So what DOES it cost?
> 
> Rick
> 
> -----Original Message-----
> From: Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com>  
> [mailto:Homebrew_PCBs@yahoogroups.com
<mailto:Homebrew_PCBs%40yahoogroups.com> 
> ]
> On Behalf Of smilingcat90254
> Sent: Tuesday, January 08, 2013 6:13 PM
> To: Homebrew_PCBs@yahoogroups.com <mailto:Homebrew_PCBs%40yahoogroups.com>

> Subject: [Homebrew_PCBs] photo resist. Slightly different material.
> 
> Some of you have complained that the resist lifts off or gets damaged
during
> handling. laying of the transparent image, static electricity causing the
> resist to lift off with the image, vacuum bagging causing more surface
> scratch and so on. 
> 
> and the use of chemicals.
> 
> I just recently ordered a material called puretch from only US
distributor.
> claims that the film is good down to 1 mil resolution provided your image
is
> that good.
> 
> links to the US distributor: www.capefearpress.com/puretch.html
> youtube videos on the product: www.youtube.com/watch?v=xkGt9nFER1s
> 
> another link:
> http://www.polymetaal.nl/siteUK/shopukwork/en-gb/dept_183.html
> 
> Developer used is sodium carbonate (do not get it confused with sodium
> bicarbonate which is baking soda)
> 
> capefear press has some good information on how to expose without creating
> shadows and the lamp recommended. Good solid information. Application at
> capefearpress is not electronics but rather arcane art form. Far more
> technical than most of us here or using toner transfer method.
> 
> Some advantages: photoresist is protected from handling by a thin plastic
> layer. It is removed when you are ready to develop so that you can't
scratch
> or lift off during handling and exposing.
> 
> For photoimaging, they also sell stoufer exposure gauge to help you get
the
> right exposure.
> 
> ------------
> For now I think I have Pulsar toner transfer system working well enough.
> Don't need to use lot of pressure. Too much pressure causes the toner to
> "bleed" on the edges. temperature to melt toner is around 100C anything
more
> and the toner becomes too thin and the image "bleeds"/run.
> 
> I may still switch over to puretch. Don't need to keep printing images for
> multiple board. higher resolution for use with TQFP with 0.5mm pitch.
Pulsar
> is near the limit for 0.5mm pitch.
> 
> ------------------------------------
> 
> Be sure to visit the group home and check for new Links, Files, and
Photos:
> http://groups.yahoo.com/group/Homebrew_PCBsYahoo! Groups Links
> 
> 
> 
> 
> 
> [Non-text portions of this message have been removed]
>





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