Homebrew PCBs

Here you can see this idea: http://www.vertice.cl/cnc1/

Greetings from Chile

Esteban Arias
earias@...

At 05:19 p.m. 30/05/2005, you wrote:
>Hi All,
>
>A simple method for compensating for slight misalignments is use a
>length of vinyl tubing which is a snug fit on the ballscrew.  You will
>likely have to machine a bushing to fit on the stepper motor shaft.
>
>Since you can do this with one setup on the lathe the holes will be
>concentric and the only "gotcha" is the fit of the bushing on the
>stepper motor shaft.  Try for a slight interference fit and use
>Loctite grade B bearing mount on final assembly.
>
>Some further thoughts on PCB drills.
>
>If you cast your machine base out of 95% ( by weight ) mason's sand
>and 5% Clark's liquid epoxy ( 
><http://www.clarkcraft.com/>http://www.clarkcraft.com/ ) you'll a
>very strong base that can topped with a final thin liquid epoxy coat
>to level everything out at a cost well under $100.
>
>If you make a vacuum tight box under a work surface of MDF a shop vac
>will hold the PCB tightly in place.  Since you will need some sort of
>dust pickup for the drill it makes sense to let the shop vac be your
>clamp.
>
>
>
>
>
>Be sure to visit the group home and check for new Bookmarks and files:
><http://groups.yahoo.com/group/Homebrew_PCBs>http://groups.yahoo.com/group/Homebrew_PCBs 
>
>
>
>
>----------
>Yahoo! Groups Links
>    * To visit your group on the web, go to:
>    * 
> <http://groups.yahoo.com/group/Homebrew_PCBs/>http://groups.yahoo.com/group/Homebrew_PCBs/ 
>
>    *
>    * To unsubscribe from this group, send an email to:
>    * 
> <mailto:Homebrew_PCBs-unsubscribe@yahoogroups.com?subject=Unsubscribe>Homebrew_PCBs-unsubscribe@yahoogroups.com 
>
>    *
>    * Your use of Yahoo! Groups is subject to the 
> <http://docs.yahoo.com/info/terms/>Yahoo! Terms of Service.