Re: [CAD_CAM_EDM_DRO] Re: RoboFac / Stewart-Gough Platform / Hexapod Milling Machine

Wayne C. Gramlich wrote:

>Just tell us if the unit is holding .01", .001",
>or .0001" accuracy.
>
>

If I had to guess, I'd say about 0.005".

>>Does Sherline or Taig make a 5 axis machine?
>>
>>
>
>Net yet. Many people who are building robots
>(which is the overall thrust of Servo magazine)
>will be perfectly happy with a 3-axis machine.
>
>

Yep.

Some of them also might want a 5 DOF manipulator for reasons other than
machining.

>>I suspect my hexapod has a larger work envelope.
>>
>>
>
>Both Sherline and Taig publish the work envelopes for
>their machines. What are the dimensions of your
>work envelope? (I didn't notice the work dimensions
>published in your article.)
>
>

It can do 8"x8"x6" pretty accurately, and a lot more than that with less
accuracy.

>>I have spent less than $1000 on RoboFac. I didn't
>>include a price list, as many of the parts are
>>scrounged, including the controlling computer.
>>
>>
>
>It makes it hard to compare prices doesn't it?
>
>

Yes. Of course the purpose of the articles is not to provide details on
how to duplicate what I've made, but to let you know what is possible
and to give you ideas on how build your own hexapod. I do give sources
for almost all of my parts.

If there's enough demand, I may create a complete set of plans and
instructions.

>If people are willing to scrounge a little, they
>can buy a new CNC ready Sherline and probably
>put to gether a fully functional system for a
>similar price range -- certainly well less than
>the $2000 you mention in the article.
>
>

The cheapest CNC setup I've seen so far uses salvaged printer carriages
and steppers for the axes.

>Please post some more pictures of your useful work.
>
>-Wayne
>
>

You've got the RoboFac sign and aluminum slots on CNCZone, and the
plastic sign in the third article. And that's pretty much all I've done
with the machine. Since I built it, I've been short on the resources
needed to start my next project.




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