Homebrew PCBs

In a message dated 1/31/2010 1:52:20 P.M. Central Standard Time,  
jamesrsweet@... writes:

Is  there a good low cost option or am I best off just building something  
myself?<<
James:  IF you have the adequate machine-shop, time, and $$, you can  build 
a proper little "application-specific" drill-press using Thomson linear  
bearings and case-hardened shafting (the centers can be  
tailstock-drilled/threaded!) using a ca. 100-watt 400 Hz. 3-phase "instrument  motor" if you can 
come up with the power-supply for that.  I cobbled my own  that way.  Used a 
Dremel collet canibalized from an old hand-held  Dremel.   (What [junk]!)  
The little 400 Hz motor will give you  12,000 or 24,000 RPM, depending on 
what kind you find from that surplus  dealer.
 
But this was not for a "manual" drill-press,but a little CNC rig I built  
back in PET-days.  Must convert for use with "PC" but having a lot of  
trouble finding a round tuit!
 
1/8" shank solid-carbide "PCB drill-bits" with drill-tip-diameter smaller  
than 1.5 or 2.0 mm can NEVER be used successfully (aka "happily"!) with a 
Dremel  rig!  Look at the bearings they put in those, now!  UGH!


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