Homebrew PCBs

Answers are coming up....I'm switching some Yahoo
accounts today to get some things up to date. I made a reply,
but I'm still on moderated status with the new account.

My new account name is cnc739

:)
John



--- In Homebrew_PCBs@yahoogroups.com, DJ Delorie <dj@...> wrote:
>
> 
> Sweet.
> 
> I've been pondering CNC recently, and offer some thoughts...
> 
> Would it help to have two drive screws per axis, to avoid racking?  My
> router lift works that way.  Put them on opposite sides of the load for
> the Z axis.
> 
> Have you looked at the Harbor Freight 1/8" air-driven grinder, as a
> spindle?  I'm wondering if high speed air spindles would have less
> runout than, say, a dremel.
> 
> Your Y-axis has upper and lower guides, with the load cantilevered off
> the side.  Have you considered supporting the Y-axis the same as the X
> axis, with a sort of table to mount the load on?
>