Homebrew PCBs

Mike Young wrote:

>I cheated. The whole affair is unreproduceable unless you, like me until 
>this evening, happen to have a spare 6" linear rail sitting around unused in 
>your part box. (THK HSR-12RM, 150 mm long, single truck; likely useless for 
>  
>

  While not of the same grade, a pair of the KV drawer rails from Lowes 
will come out closer to this than you might think.  And slightly torqued 
against each other there will be near zero play, and for $15 or less for 
immediate purchase.  Remove the outer rail of the 3 rail slides though, 
then cut the size and section you need.

> 
>some things that need addressing. For one, the L post is too flexible; it 
>tweaks a few degrees when the Rotozip starts up, and stays there until it 
>shuts off. No side-loads when drilling with hair, so no emergency. The whole 
>post needs rethinking; maybe build up an MDO box girder instead. For two, 
>  
>


  Metal electrical boxes are good for volume and right angles.  Have to 
bend things slightly to get 90 degrees, but once there and bolted to 
other things they're relatively sturdy.  Remove all the hole plugs and 
they're relatively light for how good they are too.

Alan