Homebrew_PCBs

--- In Homebrew_PCBs@yahoogroups.com, Stefan Trethan
<stefan_trethan@g...> wrote:

> On Sun, 25 Apr 2004 11:21:52 -0000, ballendo <ballendo@y...> wrote:
>
> > Hello Stefan,
> >
> > This is done by empirical testing/experimentation at first, using

the

> > canned cycle and/or macro params. Then it will be repeatable.
> >
> > I already explained the screw. With the air pressure syringe

types,

> > the timing can be controlled using G04, which is a dwell in
> > milliseconds.
> >
> > Hope this helps,
> >
> > Ballendo
> >
> > P.S. I have never used an excel program to create a toolpath.

Others

> > have had great success doing so; I've just never found it

necessary.

> >
>
> as in my other post, how do you insert these gerber commands?
> Do you edit the file all by hand or do you have a software where

you just

> load the file?
>
> ST

I use TurboCNC and in that they have a jump command, think of a goto
in prgramming.

I move to the X/Y location, then jump to the drilling routine.

The drilling routine tells the Z to feed, and includes feed rate and
feed depth. it also included retraction speed and retraction height.

It would be a simple matter to add a second axis in that routing to
dispense some value of paste.

I immeadiatly think that one could create some common units of paste.

A 0603 cap might get 6 units per pad, an 0805 might get 8 units. A
SOIC chip might get 6 units per pad, a TSSOP might get 3 units and so
on.

With some programming, this should be simple enough and I am sure
that in the near future, someone will offer the software for us home-
brew types.

Dave