X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from ms-smtp-03.southeast.rr.com ([24.25.9.102] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1842493 for flyrotary@lancaironline.net; Fri, 16 Feb 2007 15:55:56 -0500 Received-SPF: pass receiver=logan.com; client-ip=24.25.9.102; envelope-from=eanderson@carolina.rr.com Received: from edward2 (cpe-024-074-103-061.carolina.res.rr.com [24.74.103.61]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with SMTP id l1GKstvL009025 for ; Fri, 16 Feb 2007 15:54:55 -0500 (EST) Message-ID: <000b01c7520c$b948ce30$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: SMD Printer Photo 2 Date: Fri, 16 Feb 2007 15:55:00 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0008_01C751E2.D03017E0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3028 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3028 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0008_01C751E2.D03017E0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Hi Bill, To answer your question, Yes. And I am certain they can be made to do = the job. In fact, before the stencils arrived on the SMD scene, it = appears they used a "Mesh screen" which I understand is very close to = what the silkscreen printers do.=20 But, the "mesh screen" approach was limited by the smallest pitch of = pins they could resolve to, so they went to the stencil approach. With the solder paste method (from what I think I understand) appears to = require some consistency of pressure for best results. That lead to my = adjustable springs to put the squeegee under consistent pressure - = supposedly once I find that magic pressure setting then consist good = result will follow. Lots of ways to skin this cat. Ed ----- Original Message -----=20 From: wrjjrs@aol.com=20 To: Rotary motors in aircraft=20 Sent: Friday, February 16, 2007 3:41 PM Subject: [FlyRotary] Re: SMD Printer Photo 2 Ed, That looks like innovative and neat work. Now the apparatus begs = the question, have you ever looked at a standard silkscreen jig from the = art store to do the same job? The design you made is considerably = tougher, but some of the silkscreen machines are pretty well framed = using hardwood. FWIW (which probably aint much) Bill Jepson =20 -----Original Message----- From: eanderson@carolina.rr.com To: flyrotary@lancaironline.net Sent: Fri, 16 Feb 2007 11:19 AM Subject: [FlyRotary] SMD Printer Photo 2 This shows one of the two side mounts of my SMD solder paste printer = which is attached to the MSD nylon strip which rides in a groove inside = the cheap T track. The T track is simply screwed to the 1/2" slab of = aluminum. The acorn nut provides tension through a 1/4" threaded rod and = keeps the pull-handle gripped between the two sides and provides tension = on the side plate which puts side pressure on the MSD strip in the T = rail. More pressure makes the device slide slower and less makes it = faster. =20 The squeegee holder can pivot to either put the squeegee down on the = bed or to hold it up off of it after a solder run and you want to move = the squeegee holder back to the other original end of the board without = smearing your deposited paste. The second photo shows where the squeegee holder would be positioned = after a "solder-run" was made. I would then rotate the squeegee up 1/8" = inch out of contact with the bed and move it back to the other = (starting) end of the bed. Ed The message is ready to be sent with the following file or link = attachments: MVC-007F.JPG Note: To protect against computer viruses, e-mail programs may prevent = sending or receiving certain types of file attachments. Check your = e-mail security settings to determine how attachments are handled.=20 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ [Image Removed]=20 [Image Removed]=20 -------------------------------------------------------------------------= ----- Check out the new AOL. Most comprehensive set of free safety and = security tools, free access to millions of high-quality videos from = across the web, free AOL Mail and more. ------=_NextPart_000_0008_01C751E2.D03017E0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Hi Bill,
 
To answer your question, Yes.  And = I am=20 certain they can be made to do the job.  In fact, before the = stencils=20 arrived on the SMD scene, it appears they used a "Mesh screen" which I=20 understand is very close to what the silkscreen printers do. =
 
But, the "mesh screen" approach was = limited by the=20 smallest pitch of pins they could resolve to, so they went to the = stencil=20 approach.
 
With the solder paste method (from what = I think I=20 understand) appears to require some consistency of pressure for best=20 results.  That lead to my adjustable springs to put the squeegee = under=20 consistent pressure - supposedly once I find that magic pressure setting = then=20 consist good result will follow.
 
Lots of ways to skin this = cat.
 
Ed
----- Original Message -----
From:=20 wrjjrs@aol.com
Sent: Friday, February 16, 2007 = 3:41=20 PM
Subject: [FlyRotary] Re: SMD = Printer=20 Photo 2

Ed, That looks like innovative and neat work. Now the apparatus = begs the=20 question, have you ever looked at a standard silkscreen jig from the = art store=20 to do the same job? The design you made is considerably tougher, but = some of=20 the silkscreen machines are pretty well framed using hardwood. FWIW = (which=20 probably aint much)
Bill Jepson
 
 
-----Original Message-----
From:=20 eanderson@carolina.rr.com
To: flyrotary@lancaironline.net
Sent: = Fri, 16=20 Feb 2007 11:19 AM
Subject: [FlyRotary] SMD Printer Photo 2

This shows one of the two side mounts of my = SMD solder=20 paste printer which is attached to the MSD nylon strip which rides in = a groove=20 inside the cheap T track.  The T track is simply screwed to the = 1/2" slab=20 of aluminum. The acorn nut provides tension through a 1/4" threaded = rod and=20 keeps the pull-handle gripped between the two sides and provides = tension on=20 the side plate which puts side pressure on the MSD strip in the T = rail. =20 More pressure makes the device slide slower and less makes it = faster. =20
 
The squeegee holder can pivot to either put = the squeegee=20 down on the bed or to hold it up off of it after a solder run and you = want to=20 move the squeegee holder back to the other original end of the board = without=20 smearing your deposited paste.
 
The second photo = shows where the=20 squeegee holder would be positioned after a "solder-run" was = made.  I=20 would then rotate the squeegee up 1/8" inch out of contact with the = bed and=20 move it back to the other (starting) end of the bed.
 
Ed
 
 
The message is ready to be sent with the following = file or=20 link attachments:
MVC-007F.JPG

Note: To protect against = computer=20 viruses, e-mail programs may prevent sending or receiving certain = types of=20 file attachments.  Check your e-mail security settings to = determine how=20 attachments are handled.

[Image Removed] =
[Image Removed] =
Check out the new AOL. Most comprehensive = set of free=20 safety and security tools, free access to millions of high-quality = videos from=20 across the web, free AOL Mail and = more.
------=_NextPart_000_0008_01C751E2.D03017E0--