[TheForge] oxy-propylene, propane tips and air-arc

[Peter Fels And Phoebe Palmer]

Ben, i have worked up 2 versions.
1 uses trailer hitch balls welded to the ends of pieces of pipe 
for the arms. The joint is made of 2 plates with large holes at 
each end to clamp the balls. 2 bolts hold the plates together and 
adjust the stiffness of the joint.
The second uses the toothed aluminum folding joints found on the 
collapsable carts used to carry golf club bags....stiff and 
light. With some modification they can be made to turn on the 
shaft too....Is that what you were asking?...pete

Ben Barrett wrote:
> Awesome news, that is just the sort of thing I was hoping to hear!!
> I can sacrifice a little bit of time to save a bunch of money, at this
> point.  No employees, just trying to screw around and teach myself,
> get hours  in hammering and working metal in general :)
> 
> Both ideas sound perfect!  Know anything about multiple-burner versions, 
> even?
> Kinda makes sense, if I wanted to make a 3-burner model that all sort
> of pointed slightly inward, say for a convex surface or edge/tip of a
> piece, the fuel is cheap enough, drilling a jet/nozzle or three isn't
> too bad, and the whole head could be on a quick-release for swapping a
> single smaller (or larger)
> jet.
> 
> Now that I've struck gold once, let me just ask this:
> Does anyone have suggestions for a multi-axis third arm?
> 6-axis, preferrably, what would be great is not quite a robot, I would
> like to be able to lock certain (or all) joints so that a piece (or
> tool) could be locked to a place or a single axis, or held steady,
> then easily unlocked to be moved around.  Without locking any axis or
> carrying much weight at all, a swing-arm lamp might be a start.
> Yeah, I'm talking totally junk-yard, scrapper stuff here, things that
> are prolly a waste of time to many folks on the list... heh heh.
> 
> thanks,
> 
> ben
> 
> 
> On 6/23/07, Peter Fels And Phoebe Palmer <artgawk at thegrid.net> wrote:
>> Hey Ben:
>> Carl Jennings, may he rest in peace, Had a torch he made from an
>> old 50s style metal blow dryer , some pipe and a propane jet and
>> needle valve. He had it rigged so that it'd mount on an
>> adjustable stand or could be hand held. It wasn't fast as a
>> rosebud, but it was cheap to build and run. He'd set it on the
>> stand, focused on the spot next to the one he was working on so
>> when the part he was hammering cooled he could just move the hot
>> spot over to his stake.
>> Yes, using, say firebricks, to make a backing , corner or box to
>> heat in,is much more efficient and quicker.
>> Helmut Hillenkamp made a dome shaped shell lined with kaowool
>> that had a simple burner sticking out the top. He could use it
>> conventionally on a firebrick table or pick it up and plunk it
>> over larger work....pete
> 
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