X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from rwcrmhc11.comcast.net ([216.148.227.151] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with ESMTP id 1842592 for flyrotary@lancaironline.net; Fri, 16 Feb 2007 16:53:21 -0500 Received-SPF: none receiver=logan.com; client-ip=216.148.227.151; envelope-from=wschertz@comcast.net Received: from 7n7z201 (c-24-7-194-231.hsd1.il.comcast.net[24.7.194.231]) by comcast.net (rwcrmhc11) with SMTP id <20070216215221m11008df6ae>; Fri, 16 Feb 2007 21:52:32 +0000 Message-ID: <004a01c75214$bfbee210$e7c20718@7n7z201> From: "Bill Schertz" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: SMD Printer Photo 2 Date: Fri, 16 Feb 2007 15:52:16 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0045_01C751E2.6EB23520" 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 This is a multi-part message in MIME format. ------=_NextPart_000_0045_01C751E2.6EB23520 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ed, Very nice printer you made -- how do you get your stencils? Bill Schertz KIS Cruiser # 4045 ----- Original Message -----=20 From: Ed Anderson=20 To: Rotary motors in aircraft=20 Sent: Friday, February 16, 2007 2:55 PM Subject: [FlyRotary] Re: SMD Printer Photo 2 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_0045_01C751E2.6EB23520 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Ed,
Very nice printer you made -- how do you get = your=20 stencils?
Bill Schertz
KIS Cruiser # 4045
----- Original Message -----
From:=20 Ed=20 Anderson
Sent: Friday, February 16, 2007 = 2:55=20 PM
Subject: [FlyRotary] Re: SMD = Printer=20 Photo 2

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 = understand is very close to what the silkscreen printers do. =
 
But, the "mesh screen" approach was = limited by=20 the 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=20
To: Rotary motors in = aircraft=20
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=20 the question, have you ever looked at a standard silkscreen jig from = the art=20 store to do the same job? The design you made is considerably = tougher, but=20 some of 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,=20 16 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=20 groove inside the cheap T track.  The T track is simply screwed = to the=20 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=20 provides tension on the side plate which puts side pressure on the = MSD strip=20 in the T rail.  More pressure makes the device slide slower and = less=20 makes it faster. 
 
The squeegee holder can pivot to either put = the=20 squeegee down on the bed or to hold it up off of it after a solder = run and=20 you want to move the squeegee holder back to the other original end = of the=20 board without smearing your deposited paste.
 
The second photo = shows where=20 the squeegee holder would be positioned after a "solder-run" was = made. =20 I would then rotate the squeegee up 1/8" inch out of contact with = the bed=20 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=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]=20
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Check out the new AOL. Most comprehensive = set of=20 free safety and security tools, free access to millions of = high-quality=20 videos from across the web, free AOL Mail and=20 more.
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