RObot for Sale: Just throwing this out there :)

[Michael S]

Just throwing the thought out there...

http://detroit.craigslist.org/okl/tls/3310661186.html

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-----------------------------------------------------

M.S. in Information '13

Human-Computer Interaction

M.S. Arch. in Digital Technology '13

Partial M.Arch.

University of Michigan 

Mech. Eng. and Tech. Comm. dual B.S.
Michigan Technological University

Alumni of Mu Beta Psi
General Technics Member

Michael H. Senkow | 906.281.4672

[Roger S]

There's a brand new 150W laser cutter for less.  ;)

[Michael S]

Yes but while Laser cutters are wonderful, they can't:

Cut PVC

Cut in 3 dimensions

exrtrude plastic

paint children's faces

On Wed, Nov 14, 2012 at 5:47 PM, Roger S <surfer...@gmail.com> wrote:

There's a brand new 150W laser cutter for less.  ;)

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[Alan Evans]

Lasers also can't:
http://www.youtube.com/watch?v=CR9TVNGLMCI

[Keith Mc]

Michael S wrote:
>Just throwing the thought out there
> ...http://detroit.craigslist.org/okl/tls/3310661186.html

> (On it, it shows:)
>... Spare hydropneumatic counter balance

Now THAT sounds interesting. Please tell us about that tech!

Does the controller monitor the motors for residual unbalanced
torque, and continuously pump water in & out of "counterweight
shells" via air pressure to compensate for it, or what?

> Yes but while Laser cutters are wonderful, they can't: [...]
> [...] paint children's faces

Well, just in Carbon Black, and Blood Red... But I'd imagine
that would be pretty darn painful (and permanent, and tacky.... ;-)

- Keith Mc.

[John Sugg]

I remember seeing one of these rides at CJ Barrymores a few years ago. Is it still there?

John

Sent from my iPhone

[Keith Mc]

BTW, on a more serious note: If you ever see a little scrapped
out "Tabletop Scale" industrial Arm, for CHEAP, I may be
interested in looking at it for my Personal Tabletop FMS.

I have several Scorbot-IIIs now. But I may be interested in a BIT
more capacity than those toys. Maybe something like an early
SCARA arm or a VERY "small brother" (say 2 foot tall?) of the
one shown.

I'm probably seeking a mechanically simple, but complete
Electric (not hydraulic) Arm. Maybe something left over from
a bulk lot sale. Without a controller is fine. But it must be at
scrap prices, and small enough that I could successfully
interface and drive it with (maybe say) some Geckos.

No rush though. Ah'm Jus' Sayin', in case something wanders by...
I've been watching eBay on occasion, but nothing appropriate
has caught my eye yet. I'm not interested in man-sized,
multi-ton machines. Just tabletop sized Assemblers and
Pick-n-Place machines

Thanks!
- Keith Mc.

[Michael S]

http://gizmodo.com/5876790/robot-face-painter-is-somehow-even-more-terrifying-than-clowns/gallery/1

- Keith Mc.

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[Roger S]

Kuka robots with broken controllers don't do any of that

[David McMillan]

On 11/14/2012 5:31 PM, Michael S wrote:
> Just throwing the thought out there...
> http://detroit.craigslist.org/okl/tls/3310661186.html

> For more options, visit this group at
> http://groups.google.com/group/i3detroit-public?hl=en.

Dang... speaking from deep personal experience, that's a great
machine and a pretty good price for it, although you could easily spend
another $2-4k replacing the missing components.

The downsides are that it needs 480VAC 3-phase power, a pretty
thick concrete floor to anchor into, and needs some sort of
safety-fenced workzone. And it's old enough that the parts are no
longer in production, although a strong "refurb" market exists.

[David McMillan]

Um... just as a PSA, no one should be considering using that robot
for either "rides" or "painting children's faces." The KUKA RoboCoaster
is a similar model, but with double the payload capacity, and has
special hardware alterations to meet the safety requirements of the
various US and European agencies that approve amusement park rides. You
*could* bolt a seat to a stock KR150, but offering rides to the public
would be courting legal disaster. And "riding" it in-house as a
members-only thing would be... well, *I* might do it, but only if I had
sufficient safeties rigged.
As for face-painting... I *might* be willing to let it paint *my*
face, but only if *I* were holding the teach pendant and the robot was
operating in speed-limited mode.

[David McMillan]

Not at CJ's, no. That was a temporary promotional thing. But
EPCOT at Disney World has a *bunch.*

[David McMillan]

On 11/14/2012 8:09 PM, Keith Mc wrote:
> Michael S wrote:
>> Just throwing the thought out there
>> ...http://detroit.craigslist.org/okl/tls/3310661186.html
>> (On it, it shows:)
>> ... Spare hydropneumatic counter balance
> Now THAT sounds interesting. Please tell us about that tech!
>
> Does the controller monitor the motors for residual unbalanced
> torque, and continuously pump water in & out of "counterweight
> shells" via air pressure to compensate for it, or what?

Nope, nothing so complex. The second axis (the "shoulder") has to
fight gravity going forward or back. If you look at the picture, the
second axis is standing almost straight up, and just to the left of that
axis is a hydraulic cylinder with a Tylenol-shaped air tank above it.
That cylinder and tank are linked to the second axis, and set to a
pressure (varies for different payload models) that exerts nearly zero
force on the arm when the 2nd axis is upright, and "pulls" that axis
towards upright from either direction. Basically, the cylinder helps
prevent the axis servomotor from over-speeding when it's moving "with"
gravity, and helps assist the servo when it's moving "against" gravity.
The dynamic model that drives the servo includes the force of the
counterbalance and adjusts the servo accordingly.
If you look past the cluster of three motors up on the "elbow" of
the arm, you'll see a large black block of cast iron -- that's a plain
old counterweight that serves a similar, though less dynamic, role for
the 3rd axis.

>
>> Yes but while Laser cutters are wonderful, they can't: [...]
>> [...] paint children's faces
> Well, just in Carbon Black, and Blood Red... But I'd imagine
> that would be pretty darn painful (and permanent, and tacky.... ;-)

I can imagine a scenario where I might be willing to let it paint
my face... with a high-compliance brush, and holding a deadman switch,
with the robot in strict speed-limited mode. But it wouldn't satisfy
RIA safety standards. There *are* ways to *make* it safe for that sort
of application under RIA standards, but it would require additional
expensive hardware.

[David McMillan]

On 11/14/2012 9:57 PM, Michael S wrote:
> http://gizmodo.com/5876790/robot-face-painter-is-somehow-even-more-terrifying-than-clowns/gallery/1

Thank goodness it was a prank! I use those robots on a daily
basis, and I could see *several* OMG!-level safety violations for an
application like that.