Homebrew PCBs

Hi Stephan,
I have the flex shaft and I was planning to use this in my CNC 
driller but I have changed my mind about it. 1= it gets VERY hot so 
if you are going to use it for longer time drilling you must provide 
good cooling for the handpiece. I have not tested to see how warm the 
shaft is though. 2=I think the best way to apply the motor/shaft is 
haning the motor above your drill press. This flex shaft is very good 
but is *limited* to *normal* hobby use and that means short interval 
usage, othervise be prepared to buy some extra BB:s as they will wear 
due to overheating.

Bengt

ps. havent had time to finish my fuser yet, but soon I hope....


--- In Homebrew_PCBs@yahoogroups.com, "Stefan Trethan" 
<stefan_trethan@g...> wrote:
> 
> Hi all,
> 
> has anyone of you the flexible shaft from proxxon?
> The webpage says it has 2 BBs in the handpiece, and the good 
quality  
> proxxon precision
> ground collets.
> 
> I must make a drill press with viewing apparatus, and i might not 
want to  
> tie up the mini drill itself.
> The flexible shaft would provide the precision spindle and collets, 
while  
> a simple motor could
> easily be fitted to drive the shaft. Maybe the ball bearings in 
the  
> handpiece could be tightened
> up in some way should there be too much play.
> 
> what do you think?
> 
> ST