Re: tooling table ideas

Hi Bill,

I am about in the same situation, I think. I am not sure of what you
question is though.

I think you are referring to what to use for a backer board to hold the
PCBs while milling and drilling, if that is the case, that is where I
am at as well.

As you know, when drilling, the drill bits will pass through the PCB
into a backer board of some sort. That is generally a waste material
of some sort - perferably something cheap and it is often called a
spoil board.

On my machine, I am pretty limited in height so I am currently planning
on using tempered hardboard (AKA Masonite). It's cheap, relatively
uniform in thickness and easy to cut into various sizes.

For holding the PCB while machining, right now double sided tape
appears to be the easiest and quickest method. However, that is not
without problems. If you drill or mill into that tape, it will gum up
the tool and cause the chips to stick to it. For drills, this should
not present too much trouble, however, for milling it could cause
problems.

I have yet to get to that point but have been giving thought to it and
have yet to come up with a universal "Clamp" that I like. Several
ideas, but nothing I have put on paper yet.

Chris



--- In CAD_CAM_EDM_DRO@yahoogroups.com, "wdavis364" <wdavis364@...>
wrote:

>
> I,m Posting this on several groups.
> Building a cnc machine.
> I'm at the point where I need to come up with ideas for the tooling
> table. My base plate is 14"x8"x1/4 aluminum. What kind of material
> should I be looking at to use for routing and drilling circuit boards?
> Maybe some of you could tell me what works best for you.
> thanks
> bill
>