Homebrew PCBs

Bill Blackburn wrote:
> What are you guys using for your feed screws?  When using directly 
> mounted Stepper Motors, what would be a good thread pitch for reasonable 
> travel speeds?
> Thanks for the help.
> 
> Bill 
> 

   Thinking 'linear motion products' but can't remember for sure if that's the 
right company name.  They have 1/4" lead screw, and plastic anti-backlash nuts. 
  A friend got some and 3 four foot sections plus screws was around $100 or a 
little over, which isn't too bad really.

   Most notable, pretty sure they had some that was 2 start.  As in still 20 
groves per inch, but 2 helix both at 10 pitch so you only had 10 turns to the 
inch.  Something like that is what you want if you can get it, still reasonable 
from the smaller size but faster travel.

Alan