X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 30 [X] Return-Path: Received: from web81201.mail.mud.yahoo.com ([68.142.199.105] verified) by logan.com (CommuniGate Pro SMTP 5.1.6) with SMTP id 1842893 for flyrotary@lancaironline.net; Fri, 16 Feb 2007 21:04:11 -0500 Received-SPF: none receiver=logan.com; client-ip=68.142.199.105; envelope-from=mike.lafleur@sbcglobal.net Received: (qmail 69180 invoked by uid 60001); 17 Feb 2007 02:03:24 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=sbcglobal.net; h=X-YMail-OSG:Received:X-Mailer:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=ta4PxjjBmlpyIpnIJbvIJlzMOxuQJ/ulZsnEdOQ/ldfCvtxLWdeAqrxp2I2ZLubm3xV+csO1SIC+HV/V7W6FZQqgrH85R8Vehh4MLh2CJtLXBjQz52+A0hyKe7lx074uODnCL+jDhDImzbhI/90ToMRX2CaWe6fbaE7s3aaO/Zc=; X-YMail-OSG: Qhhh3LYVM1lHRXqxi2ZfWJOs6GiV04lhP_40LXbieu0bMmGSkqTD5EGVpdkvELozvPHZvXJPicYvzBV68flayIH7ujTjwiyKhgwU5ESNaa9ZCZIA1fMJj_GPoN93UaNummEb9thLa9b8tSo- Received: from [68.248.2.242] by web81201.mail.mud.yahoo.com via HTTP; Fri, 16 Feb 2007 18:03:24 PST X-Mailer: YahooMailRC/368.7 YahooMailWebService/0.6.132.7 Date: Fri, 16 Feb 2007 18:03:24 -0800 (PST) From: Michael LaFleur Subject: Re: [FlyRotary] Re: SMD Printer Photo 2 To: Rotary motors in aircraft MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1975772546-1171677804=:66906" Message-ID: <921578.66906.qm@web81201.mail.mud.yahoo.com> --0-1975772546-1171677804=:66906 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable We produce and test a lot of boards that are all SMDs and fine pitch device= s. Getting that solder paste on the correct thickness is an art form. Even = with a tightly controlled manufacturing process and state of the art equipm= ent, there are often problems.=0A=0AI saw a real nice pick-n-place machine = for placing somponents on circuit boards go at auction for $500. It was pro= bably worth 100 times that. If I were in California, I'd have bought it.=0A= =0AMike LaFleur=0A=0A----- Original Message ----=0AFrom: Ed Anderson =0ATo: Rotary motors in aircraft =0ASent: Friday, February 16, 2007 6:25:18 PM=0ASubject: [FlyRotary= ] Re: SMD Printer Photo 2=0A=0A=0A=0A =0A=0AHi Bill, there are a number of = places that will =0Amake stencils - but cheaper plastic ones a bit harder t= o find.=0A=0A =0A=0AYou take a CAD drawing for your circuit board - =0Amost= use DXF format but they can be make from Gerber files (my Circuit Board = =0Adrawing software does not produce gerber files, but will export a DXF = =0Afile). =0A=0AI then eliminate anything in the DXF file that is =0Anot a= pad or pin that I want solder on. Then e mail the file =0Ato this compa= ny/guy. http://www.pololu.com/ attn : =0AJan Malasek They use a laser t= o cut the stencil based on your DXF file and =0Aship it to you. Oh, they f= irst send you a PDF of the proposed stencil for =0Aone last check by you be= fore cutting the stencil.=0A=0A =0A=0AHere is the webpage that explains the= ir =0Aprocess. http://www.smtstencil.com/=0A=0A =0A=0AThe one I got match= es even the 30 pins of a fine =0Apitch socket with pins only 0.25mm apart, = so I was pleased. You can see =0Asome result of the laser heat on the plas= tic so its not quite as clean as with a =0Ametal stencil - but quite good f= or the price. =0A=0A =0A=0A =0A=0AEd=0A=0A=0A ----- Original Message ----= - =0A=0A From: =0A Bill =0A Schertz =0A=0A To: Rotary motors in aircraf= t =0A=0A Sent: Friday, February 16, 2007 4:52 =0A PM=0A=0A Subject: [Fly= Rotary] Re: SMD Printer =0A Photo 2=0A=0A =0A=0A=0A Ed,=0A=0A Very nice= printer you made -- how do you get your =0A stencils?=0A=0A Bill Schertz= =0AKIS Cruiser # 4045=0A=0A =0A ----- Original Message ----- =0A=0A = From: =0A Ed Anderson =0A=0A To: Rotary motors in aircraft =0A =0A= =0A Sent: Friday, February 16, 2007 2:55 =0A PM=0A=0A Subject: [Fl= yRotary] Re: SMD Printer =0A Photo 2=0A=0A =0A=0A=0A Hi Bill,=0A= =0A =0A=0A To answer your question, Yes. And I am =0A certain th= ey can be made to do the job. In fact, before the stencils =0A arrived = on the SMD scene, it appears they used a "Mesh screen" which I =0A under= stand is very close to what the silkscreen printers do. =0A=0A =0A=0A = But, the "mesh screen" approach was limited by =0A the smallest pitch = of pins they could resolve to, so they went to the =0A stencil approach.= =0A=0A =0A=0A With the solder paste method (from what I think =0A = I understand) appears to require some consistency of pressure for best =0A= results. That lead to my adjustable springs to put the squeegee under = =0A consistent pressure - supposedly once I find that magic pressure set= ting =0A then consist good result will follow.=0A=0A =0A=0A Lots = of ways to skin this cat.=0A=0A =0A=0A Ed=0A=0A =0A ----- Or= iginal Message ----- =0A=0A From: =0A wrjjrs@aol.com =0A =0A= =0A To: Rotary motors in aircraft =0A =0A=0A Sent: Friday, F= ebruary 16, 2007 3:41 =0A PM=0A=0A Subject: [FlyRotary] Re: SMD P= rinter =0A Photo 2=0A=0A =0A=0A=0A Ed, That looks like innov= ative and neat work. Now the apparatus begs =0A the question, have you= ever looked at a standard silkscreen jig from the =0A art store to do= the same job? The design you made is considerably tougher, =0A but so= me of the silkscreen machines are pretty well framed using =0A hardwoo= d. =0A FWIW (which probably aint much)=0A=0A Bill Jepson=0A=0A = =0A =0A-----Original Message-----=0AFrom: =0A eanderson@carolina.r= r.com=0ATo: flyrotary@lancaironline.net=0ASent: Fri, =0A 16 Feb 2007 1= 1:19 AM=0ASubject: [FlyRotary] SMD Printer Photo 2=0A=0A=0A .AOLPlainT= extBody {=0AFONT-SIZE:12px;MARGIN:0px;COLOR:#000;FONT-FAMILY:Tahoma, Verdan= a, Arial, Sans-Serif;BACKGROUND-COLOR:#fff;}=0A.AOLPlainTextBody PRE {=0AFO= NT-SIZE:9pt;}=0A.AOLInlineAttachment {=0AMARGIN:10px;}=0A.AOLAttachmentHead= er {=0ABORDER-RIGHT:#7da8d4 1px solid;BORDER-TOP:#7da8d4 1px solid;BACKGROU= ND:#f9f9f9;FONT:11px arial;BORDER-LEFT:#7da8d4 1px solid;BORDER-BOTTOM:#7da= 8d4 1px solid;}=0A.AOLAttachmentHeader .Title {=0APADDING-RIGHT:3px;PADDING= -LEFT:3px;BACKGROUND:#b5ddfa;PADDING-BOTTOM:3px;FONT:11px arial;PADDING-TOP= :3px;}=0A.AOLAttachmentHeader .FieldLabel {=0APADDING-RIGHT:10px;PADDING-LE= FT:9px;BACKGROUND:#f9f9f9;PADDING-BOTTOM:1px;FONT:11px arial;COLOR:#000000;= PADDING-TOP:1px;}=0A.AOLAttachmentHeader .FieldValue {=0ABACKGROUND:#f9f9f9= ;FONT:11px arial;COLOR:#000000;}=0A.AOLAttachmentHeader A {=0ACOLOR:#2864b4= ;TEXT-DECORATION:none;}=0A.AOLImage A {=0ACOLOR:#2864b4;TEXT-DECORATION:non= e;}=0A.AOLAttachmentHeader A:hover {=0ACOLOR:#2864b4;TEXT-DECORATION:underl= ine;}=0A.AOLImage A:hover {=0ACOLOR:#2864b4;TEXT-DECORATION:underline;}=0A.= AOLWebSuiteCompose .AOLPicturesFullSizeLink {=0AOVERFLOW:hidden;WIDTH:1px;H= EIGHT:1px;}=0A.AOLWebSuite .AOLPicturesFullSizeLink {=0AOVERFLOW:hidden;WID= TH:1px;HEIGHT:1px;}=0ABODY {=0ABORDER-RIGHT:0px;BORDER-TOP:0px;FONT-SIZE:10= pt;BORDER-LEFT:0px;BORDER-BOTTOM:0px;FONT-FAMILY:"Verdana";BACKGROUND-COLOR= :white;}=0A.AOLWebSuiteCompose P {=0APADDING-RIGHT:0px;PADDING-LEFT:0px;PAD= DING-BOTTOM:0px;MARGIN:0px;PADDING-TOP:0px;}=0AIMG.managedImg {=0AWIDTH:0px= ;HEIGHT:0px;}=0AIMG.placeholder {=0ABORDER-RIGHT:#dadad6 1px solid;BORDER-T= OP:#dadad6 1px solid;BACKGROUND:#f4f4f4 no-repeat center center;BORDER-LEFT= :#dadad6 1px solid;WIDTH:275px;BORDER-BOTTOM:#dadad6 1px solid;HEIGHT:206px= ;}=0A=0A=0A =0A =0A=0A This shows one of the two side mounts= of my SMD =0A solder paste printer which is attached to the MSD nylon= strip which rides =0A in a groove inside the cheap T track. The T tr= ack is simply screwed =0A to the 1/2" slab of aluminum. The acorn nut = provides tension through a =0A 1/4" threaded rod and keeps the pull-ha= ndle gripped between the two sides =0A and provides tension on the sid= e plate which puts side pressure on the MSD =0A strip in the T rail. = More pressure makes the device slide slower and =0A less makes it fast= er. =0A=0A =0A=0A The squeegee holder can pivot to either put t= he =0A squeegee down on the bed or to hold it up off of it after a sol= der run and =0A you want to move the squeegee holder back to the other= original end of the =0A board without smearing your deposited paste.= =0A=0A =0A=0A The second photo shows where =0A the squeegee= holder would be positioned after a "solder-run" was =0A made. I woul= d then rotate the squeegee up 1/8" inch out of contact =0A with the be= d and move it back to the other (starting) end of the =0A bed.=0A=0A = =0A=0A Ed=0A=0A =0A=0A =0AThe message is ready to be = sent with the following file =0A or link attachments:=0AMVC-007F.JPG= =0A=0ANote: To protect against =0A computer viruses, e-mail programs m= ay prevent sending or receiving certain =0A types of file attachments.= Check your e-mail security settings to =0A determine how attachments= are handled. =0A=0A --=0AHomepage: http://www.flyrotary.com/=0AArchi= ve and UnSub: http://mail.lancaironline.net/lists/flyrotary/=0A=0A=0A=0A = [Image Removed] =0A =0A=0A=0A [Image Removed] =0A =0A= =0A=0A =0A =0A Check out the new AOL. Most comprehensive set= of =0A free safety and security tools, free access to millions of hig= h-quality =0A videos from across the web, free AOL Mail and =0A more.= =0A=0A=0A=0A=0A --0-1975772546-1171677804=:66906 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
We produce and test a lot of boards that are all SMDs and fine pitch= devices. Getting that solder paste on the correct thickness is an art form= . Even with a tightly controlled manufacturing process and state of the art= equipment, there are often problems.

I saw a real nice pick-n-place= machine for placing somponents on circuit boards go at auction for $500. I= t was probably worth 100 times that. If I were in California, I'd have boug= ht it.

Mike LaFleur

----- Original Message ----
Fr= om: Ed Anderson <eanderson@carolina.rr.com>
To: Rotary motors in a= ircraft <flyrotary@lancaironline.net>
Sent: Friday, February 16, 2= 007 6:25:18 PM
Subject: [FlyRotary] Re: SMD Printer Photo 2

=0A=0A =0A=0AHi Bill, there are a number of places tha= t will =0Amake stencils - but cheaper plastic ones a bit harder to find.
=0A
 
=0AYou take a CAD drawing for your circuit b= oard - =0Amost use DXF format but they can be make from Gerber files (my Ci= rcuit Board =0Adrawing software does not produce gerber files, but will exp= ort a DXF =0Afile). 
=0A
I then eliminate anything in the DXF file that is =0Anot a pad or pin t= hat I want solder on.  Then  e mail the  file =0Ato this com= pany/guy.  http://www.pololu.com/   attn : =0AJan Malase= k  They use a laser to cut the stencil based on your DXF file and =0As= hip it to you.  Oh, they first send you a PDF of the proposed stencil = for =0Aone last check by you before cutting the stencil.
=0A 
=0A
Here is the webpage that explains their =0Aprocess. =   http://www.smtstencil.com/
=0A
 
=0A
Th= e one I got matches even the 30 pins of a fine =0Apitch socket with pins on= ly 0.25mm apart, so I was pleased.  You can see =0Asome result of the = laser heat on the plastic so its not quite as clean as with a =0Ametal sten= cil - but quite good for the price. 
=0A
 
= =0A
 
=0A
Ed
=0A
=0A
----- Original Message -----
=0A =0A
To: Rotary motors in aircraft =0A
Sent: Friday, February 16, 20= 07 4:52 =0A PM
=0A
Subject: [= FlyRotary] Re: SMD Printer =0A Photo 2
=0A

=0A
= Ed,
=0A
Very ni= ce printer you made -- how do you get your =0A stencils?
=0A =
Bill Schertz
KIS Cruiser # 4045
=0A
=0A
----- Original Message -----
=0A
From: =0A Ed Anderson
=0A =0A
Sent= : Friday, February 16, 2007 2:55 =0A PM
=0A
Subject: [FlyRotary] Re: SMD Printer =0A Photo 2<= /div>=0A

=0A
Hi B= ill,
=0A
 <= /div>=0A
To answer your question, Y= es.  And I am =0A certain they can be made to do the job.  In = fact, before the stencils =0A arrived on the SMD scene, it appears they = used a "Mesh screen" which I =0A understand is very close to what the si= lkscreen printers do.
=0A
 
=0A
But, the= "mesh screen" approach was limited by =0A the smallest pitch of pins th= ey could resolve to, so they went to the =0A stencil approach.=0A
 
=0A With the solder paste method (from what = I think =0A I understand) appears to require some consistency of pressur= e for best =0A results.  That lead to my adjustable springs to put = the squeegee under =0A consistent pressure - supposedly once I find that= magic pressure setting =0A then consist good result will follow.=
=0A
 
=0A =
Lots of ways to skin this cat.=
=0A
 
=0A =
Ed
=0A
=0A
----- Original Message -----
=0A
From: =0A wrjjrs@aol.com =0A
=0A =0A
Sent: Friday, February 16, 2007 3:41 =0A PM
=0A =
Subject: [FlyRotary] Re: SMD Printer= =0A Photo 2
=0A

=0A
Ed, That looks= like innovative and neat work. Now the apparatus begs =0A the questio= n, have you ever looked at a standard silkscreen jig from the =0A art = store to do the same job? The design you made is considerably tougher, =0A = but some of the silkscreen machines are pretty well framed using =0A = hardwood. =0A FWIW (which probably aint mu= ch)
=0A
Bill Jepson
=0A
 
 -----Original Message-----
From: =0A eanderson@carolina.rr.com
= To: flyrotary@lancaironline.net
Sent: Fri, =0A 16 Feb 2007 11:19 AM=
Subject: [FlyRotary] SMD Printer Photo 2

=0A =0A=0A
=0A =0A=0A
This shows one of the two side mounts of my SMD =0A solder paste p= rinter which is attached to the MSD nylon strip which rides =0A in a g= roove inside the cheap T track.  The T track is simply screwed =0A = to the 1/2" slab of aluminum. The acorn nut provides tension through a = =0A 1/4" threaded rod and keeps the pull-handle gripped between the tw= o sides =0A and provides tension on the side plate which puts side pre= ssure on the MSD =0A strip in the T rail.  More pressure makes th= e device slide slower and =0A less makes it faster.  =0A
 
=0A
The squeegee holder can pivot to either put the =0A squ= eegee down on the bed or to hold it up off of it after a solder run and =0A= you want to move the squeegee holder back to the other original end o= f the =0A board without smearing your deposited paste.
=0A=
 
=0A
The second photo shows where =0A = the squeegee holder would be positioned after a "solder-run" was =0A = made.  I would then rotate the squeegee up 1/8" inch out of contact = =0A with the bed and move it back to the other (starting) end of the = =0A bed.
=0A
 <= /div>=0A
Ed
=0A
 
=0A
 
The message is = ready to be sent with the following file =0A or link attachments:
M= VC-007F.JPG

Note: To protect against =0A computer viruses, e-ma= il programs may prevent sending or receiving certain =0A types of file= attachments.  Check your e-mail security settings to =0A determi= ne how attachments are handled.
=0A 
--Homepage:  http://www.flyrotary.com/=0AArchive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/=0A

=0A
[Image Removed] =0A
=0A =
[Image Removed] =0A
=0A
=0A
=0A Check out the new AOL. Most comprehensive set of =0A fr= ee safety and security tools, free access to millions of high-quality =0A = videos from across the web, free AOL Mail and =0A more.

--0-1975772546-1171677804=:66906--