[Coco] Little Johns 8 slot MPI

[Gene Heskett]

On Sunday 22 September 2013 15:52:42 Gene Heskett did opine:

> On Saturday 21 September 2013 17:10:29 Mark J. Blair did opine:
> > On Sep 21, 2013, at 09:58 , Gene Heskett <gheskett at wdtv.com> wrote:
> > > But when loaded into eagle, I find the .brd is 6.05" wide front to
> > > back and I would need about 1.5" more Y axis travel than my mill
> > > has.
> > > 
> > >  So, short of building a new machine, which I might not have time to
> > > 
> > > finish, I can't make it.
> > 
> > Maybe it would make more economic sense to fabricate the board at a
> > quick-turn PCB house like PCBexpress, APcircuits, OshPark, etc? I
> > haven't examined the design files for this MPI, but if you're talking
> > about milling a PCB then I presume it's just 1 or 2 layers.
> > 
> > On the other hand, if you want to use this project to justify building
> > a bigger CNC mill, then I'll helpfully point out that it would be
> > fiscally irresponsible to NOT set up a mill to build this board at
> > home. :)
> > 
> > > The $650 model is big enough, but has 2 start trapezoidal screws,
> > > whatever that means, I think 2 threads per revolution of the screw.
> > 
> > Yes, that's what "2 start" generally means on a screw. If the screw
> > pitch looks like, say, 10 TPI but it's 2-start, then the nut will
> > advance as if it was a 5 TPI screw.
> > 
> > > I can't justify it, but I'm still thinking. ;-)
> > 
> > I've found that with sufficient thought, I can justify *anything*! :)
> 
> Trouble is, Dee has had going on 24 years now to see through most of my
> "justifications".  OTOH, I do think she appreciates that they give me
> something to do, if only I'd load the dishwasher first! :)
> 
> Just this morning as it was starting to rain, she made the remark that
> after all, I did build a garage, why didn't I use it?  She knows full
> well because its full of woodworking stuff.  I did test fit the GMC
> once by shoving everything to the side or back, had to remove the Reese
> plugin to put the door down, 3" to a workbench and chop saw on the
> right, about a foot for me to wiggle past it on the left & the front
> bumper was holding up the table saw at a slight angle.
> 
> Which I do more and more of as her COPD "progresses".  Its been known to
> be beer-thirty before Jimmy Buffets 5 o-clock somewhere.  But, being
> diabetic, the limit is 2/day.  Now its 17:20 local, so dinner is next,
> but the season isn't open yet so I can't shoot it. :(
> 
> 
> Cheers, Gene

I believe this thread is dead.  I've been looking at board house prices, 
and the best price I can get for 10 each of the two boards means I'd have 
to sell 10 sets at >$50 a set, for bare boards.  I have real serious doubts 
I could sell the group that many, based on GCC's experience as they still 
have some left 5+ years later.  Thats quite a jump into a board that has 
never been built and use tested.

It was a nice thought though, till the sun came up. :)

Cheers, Gene
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