Hi Dave,
That's funny. I am an engineer but opinions and others' expertise are always
welcome. That is how I learn. I found some inexpensive HPLC pumps on ebay but
most are sold as-is. You don't know if the seals are any good and if some
yahoo like me tried to push solder paste through it..
On Sun, 2012-08-19 at 20:39 -0500, ceen...@in-front.com wrote:
> Thanks Dave. Thought I would throw it out there. I don't have any
> experience with a HPLC pump. What if the geometry were larger and the check
> valves could cope with a suspended solid? Think on the scale of a small
> hydraul
Thanks Dave. Thought I would throw it out there. I don't have any experience
with a HPLC pump. What if the geometry were larger and the check valves could
cope with a suspended solid? Think on the scale of a small hydraulic valve
body.
Dennis
> HPLC pumps are made to deliver precise flo
On Sat, 2012-08-18 at 06:18 -0500, ceen...@in-front.com wrote:
> I found a high pressure pump (up to 40,000PSI) that may work with solder
> paste. These are readily available on ebay as high pressure liquid
> chromatography (HPLC) pumps. A description is here:
> http://www.lcresources.com/res
It seems to me like solder paste is going to separate under any pressure
differential without some special design or consideration to keep the paste
together.
On Sat, Aug 18, 2012 at 7:34 AM, andy pugh wrote:
> On 18 August 2012 13:18, wrote:
> > I found a high pressure pump (up to 40,000PSI)
On 18 August 2012 13:18, wrote:
> I found a high pressure pump (up to 40,000PSI) that may work with solder
> paste. These are readily available on ebay as high pressure liquid
> chromatography (HPLC) pumps. A description is here:
> http://www.lcresources.com/resources/getstart/2b01.htm
I s
I found a high pressure pump (up to 40,000PSI) that may work with solder paste.
These are readily available on ebay as high pressure liquid chromatography
(HPLC) pumps. A description is here:
http://www.lcresources.com/resources/getstart/2b01.htm
Even if a standard Waters style pump has geom
-- Ralph
From: ceen...@in-front.com [ceen...@in-front.com]
Sent: Tuesday, August 07, 2012 10:53 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] solder paste
Hi Ralph,
Wow. I had not thought of using thin FR4 and milling it out for a stencil. I
do have some f
Sound like you need a plate with a grid of threaded holes, and a
> bunch of (for the lack of a better descriptive term) standoffs. All
> standoffs would have the bottom threaded to screw into the plate, but
> with a flat at the edge of the threads for an accurate surface
> reference.
This is c
On 08/07/2012 08:42 AM, ceen...@in-front.com wrote:
>The majority of boards I run are double sided so all SMT processes are
> performed twice. This is one of the reasons I would like a paste printer
> because the manual stencil printer requires a lot of adjusting and fixturing
> changes whe
ling
> To: gro...@homanndesigns.com , Enhanced Machine
> Controller (EMC)
> Subject: Re: [Emc-users] solder paste
> Sent: Aug 07 '12 11:35
>
> We cut our own stencils with a 0.010" end mill on our LPKF pcb milling
> machine.
> For material we use 0.00
Gene Heskett wrote:
> I would add that temporary storage of the
> pasted board should be in an oxygen-free environment until the board comes
> out to goto the pick-n-place station, then back into the same low oxygen
> box while the reflow oven is warming up.
>
I normally get my boards from
We cut our own stencils with a 0.010" end mill on our LPKF pcb milling machine.
For material we use 0.005" thick FR4 laminate without copper, purchased in big
sheets (2'x2' or so) from Insulectro (if I recall correctly). I use the same
paste
in a syringe that we use for the occasional manual disp
Gene Heskett wrote:
> Could one use the resultant laser cut stencil as if it was a silk screen to
> apply the solder paste?
>
That's the idea.
> If so, that would certainly cut large hunks of time out of the process once
> the stencil was made. However, having the paste exposed to the air whi
cogoman wrote:
> On 08/06/2012 09:49 PM, Jon Elson wrote:
>
>> I make my own stencils for these. It is kind of a pain, but I'm CHEAP!
>>
> How about the cheapest CNC to build, an XY plotter like this:
>
> https://www.youtube.com/watch?v=WyLPpGdfR7s
>
> but with the laser from an old DVD bu
On Tuesday 07 August 2012 09:04:25 Peter Homann did opine:
> Hi Gene,
>
> It costs me about $80 for a laser cut stencil. The process of applying
> the paste is shown here.
That is I assume 80 AUD. Considering, if that is for a 6mil thick SS
stencil, that isn't too bad!
>
> http://www.homannde
eturned to fill position and the paste displaces the void.
Dennis
> ---Original Message---
> From: Peter Homann
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] solder paste
> Sent: Aug 07 '12 07:23
>
> Hi Gene,
>
> It costs me
and subject to bumping, etc. An outbound conveyor board stacker/cooler
is also on the drawing board.
Dennis
> ---Original Message---
> From: cogoman
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] solder paste
> Sent: Aug 07 '12 00:11
&g
Hi Gene,
It costs me about $80 for a laser cut stencil. The process of applying the
paste is shown here.
http://www.homanndesigns.com/index.php?option=com_content&view=article&id=54:manual-process-for-applying-solder-paste-via-a-stencil&catid=35:smt&Itemid=55
It takes less than 90 seconds to ap
On Tuesday 07 August 2012 02:32:47 cogoman did opine:
> On 08/06/2012 09:49 PM, Jon Elson wrote:
> > I make my own stencils for these. It is kind of a pain, but I'm
> > CHEAP!
>
> How about the cheapest CNC to build, an XY plotter like this:
>
> https://www.youtube.com/watch?v=WyLPpGdfR7s
That
On 08/06/2012 09:49 PM, Jon Elson wrote:
> I make my own stencils for these. It is kind of a pain, but I'm CHEAP!
How about the cheapest CNC to build, an XY plotter like this:
https://www.youtube.com/watch?v=WyLPpGdfR7s
but with the laser from an old DVD burner for the pen. You could
produce p
ceen...@in-front.com wrote:
> The vision is to spend 1-2 hours programming a printer then let it loose on
> the boards. A typical board run for me is 200 pcs.
I have never done 200 boards in a run, but may have a job that big
soon. I will get the boards
panelized and do them 20 - 30 at a time.
Hi Jon,
I use a manual stencil printer now and it does work pretty well. The issue is
banging out a stencil for all of the proto boards I make. There are about 30
proto designs created per year and since the boards change a bit before they
become final, so does the stencil. I don't see the M
Mark Cason wrote:
>
>
>a few years ago, i saw a prototyping machine, that used a syringe, to
> deposit solder directly onto a SMD pad. It basically touched down on a
> pad, and then deposited a tiny amount of solder, while retracting.
> then, it rewound the syringe's stepper, a couple step
ceen...@in-front.com wrote:
> Mydata has a MY500 solder paste printer but it about $200k USD more than I
> want to spend in the next year or so on a printer. It looks to be a nice
> machine. I may see if I can get a replacement head for a MY500 if I can.
>
Printing solder paste with a stenci
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