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'[EE]: homemade CNC pick and place'
2001\12\29@181212 by Sebastian Garcia

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Hi Roman,


----- Original Message -----
From: Roman Black <spam_OUTfastvidTakeThisOuTspamEZY.NET.AU>
To: <.....PICLISTKILLspamspam@spam@MITVMA.MIT.EDU>
Sent: Saturday, December 29, 2001 8:30 AM
Subject: [EE:] homemade CNC pick and place


| Hi everyone, has anyone built a home made
| CNC pick and place machine to do SMD work?
|
| I'm thinking of doing one with a couple of
| old matrix printer chassis, they have sliders,
| belts and stepper motors ready and will do good
| speeds with 0.1mm repeatability easily.


I've designed and built a small CNC router using three old matrix printers
mechanisms, two wide carriage travel (y axis) an one normal carriage
ravel( x axis). The reason of the two mechanisms for the y axis is for easy
preventing of 'sticking' in the non-motory support, without the use of
precision mechanics. This way, i've mounted the x axis mechanism over the
carriages of the y axis, and one of the y axis motors is slave of the
other.

Anyway, and although this system is working (for now, plotting graphics
using Bresenham's line algorithm), for best results i'll recommend You to
take the hard way and do the mechanics from zero.

By the way, my controller board is autonomous and decodes up to 64 KB of
G-Codes (actually, only an adapted version of G00 and G01) previously
downloaded from a PC to the system's memory.


Best Regards and Happy New Year,

S.-

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2001\12\30@004340 by Roman Black

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Sebastian Garcia wrote:

> I've designed and built a small CNC router using three old matrix printers
> mechanisms, two wide carriage travel (y axis) an one normal carriage
> ravel( x axis). The reason of the two mechanisms for the y axis is for easy
> preventing of 'sticking' in the non-motory support, without the use of
> precision mechanics. This way, i've mounted the x axis mechanism over the
> carriages of the y axis, and one of the y axis motors is slave of the
> other.
>
> Anyway, and although this system is working (for now, plotting graphics
> using Bresenham's line algorithm), for best results i'll recommend You to
> take the hard way and do the mechanics from zero.


Any pictures?? :o)
-Roman

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2001\12\30@175508 by Sebastian Garcia

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----- Original Message -----
From: Roman Black <fastvidspamKILLspamEZY.NET.AU>
To: <.....PICLISTKILLspamspam.....MITVMA.MIT.EDU>
Sent: Sunday, December 30, 2001 2:04 AM
Subject: Re: [EE]: homemade CNC pick and place


| Sebastian Garcia wrote:
|
| > I've designed and built a small CNC router using three old matrix
printers
| > mechanisms, two wide carriage travel (y axis) an one normal carriage
| > ravel( x axis). The reason of the two mechanisms for the y axis is for
easy
| > preventing of 'sticking' in the non-motory support, without the use of
| > precision mechanics. This way, i've mounted the x axis mechanism over
the
| > carriages of the y axis, and one of the y axis motors is slave of the
| > other.
| >
| > Anyway, and although this system is working (for now, plotting graphics
| > using Bresenham's line algorithm), for best results i'll recommend You
to
| > take the hard way and do the mechanics from zero.
|
|
| Any pictures?? :o)
| -Roman



Not yet!


Best Regards,

S.-

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'[EE]: homemade CNC pick and place'
2002\01\01@044934 by Sebastian Garcia
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Anyone knows which is the CAM file standard more used in the professional
SMD pick n'place machines?


Best Regards and Happy New Year,

S.-

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2002\01\02@105218 by Roman Black

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Sebastian Garcia wrote:
>
> Anyone knows which is the CAM file standard more used in the professional
> SMD pick n'place machines?
>
> Best Regards and Happy New Year,


No, but if you find a good web page on home built
CNC pick and place stuff I would love to bookmark it.
I haven't found much yet on the net.
Happy new year! :o)
-Roman

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2002\01\05@054514 by Peter L. Peres

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Alexandre, you seem to be into this heavily. How big is your operation
(approximately), and how much would it cost you to buy ready made
equipment for what you do (including the time wasted trying out various
improvisations ;-).

tia,

Peter

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2002\01\05@085702 by 859-1?Q?Alexandre_Guimar=E3es?=

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Hi, Peter

> Alexandre, you seem to be into this heavily. How big is your operation
> (approximately), and how much would it cost you to buy ready made
> equipment for what you do (including the time wasted trying out various
> improvisations ;-).

   It is funny how the electronics market seems to have no place for the
"some hundreds" boards a month market. I did not make my own tools just
because I like it. The prices are really crazy. Just to give you an idea. My
vacuum tweezer is an aquarium pump, a comercial one would cost somewhere
near us$ 800 ! My toaster oven with controller costed me about $300, a
comercial one would cost near $10000. My paste dispenser costed about $100,
a comercial one runs around us$1500 !!!

    I have not spent time enough to justify buying the tools and the main
advantage is that if I need another oven I just put $300 out of my pocket
and not $10000.

   It is sometimes worthwhile making our own tools. The electronics
production market is just for the big guys. The smallest automatic pick and
place machine would cost around $30000 ! I do not have that money available
for a machine that is so fast that I would use it just once a week.

   When we are small we have to be more inventive :-) The funny thing is
that all the improvisations work just as well as the comercial machines for
small scale productions.

Best regards,
Alexandre Guimaraes

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2002\01\07@205155 by Sebastian Garcia

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Hi Simon,

----- Original Message -----
From: Simon-Thijs de Feber <KILLspamstdf23173KILLspamspamYAHOO.CO.UK>
To: <RemoveMEPICLISTTakeThisOuTspamMITVMA.MIT.EDU>
Sent: Monday, January 07, 2002 11:43 AM
Subject: Re: [EE:] homemade CNC pick and place


| Hello All,
|
| I've seen the discussions about moving arms / printer
| mechanisms for the CNC.
| But is it not easier to move your PCB on the X and Y
| axis and let the pick and place part just move X and Z
| axis to get parts ????
|
| To move the pick and place part on 3 axises seems more
|
| fragile/unstable to me.


But... moving the PCB over X & Y axes at high speeds can shift the
components already placed relative to the board (assuming only solder paste
sticking support).


Regards,

S.-

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2002\01\07@205212 by Sebastian Garcia

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Hi,

Anyone has more info (specially on feeders system) about SIPLACE
Siemens pick n' place machines than the published on http://www.siplace.com ?
Alexandre???

I'm just e-mailing the local Siemens SIPLACE guy for some technical details.
I'll comment back any useful response.


Regards,

S.-

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