-- -----------------------------------------------------
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
* <http://twitter.com/MichaelSenkow>Alumni of Mu Beta Psi
General Technics Member*
On Wed, Nov 14, 2012 at 5:47 PM, Roger S <surferdud...@gmail.com> wrote:
> There's a brand new 150W laser cutter for less. ;)
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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
* <http://twitter.com/MichaelSenkow>Alumni of Mu Beta Psi
General Technics Member*
> On Wed, Nov 14, 2012 at 5:47 PM, Roger S <surferdud...@gmail.com> wrote:
>> There's a brand new 150W laser cutter for less. ;)
>> --
>> You received this message because you are subscribed to the Google Groups
>> "i3 Detroit Public" group.
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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
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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.... ;-)
>> On Wed, Nov 14, 2012 at 5:47 PM, Roger S <surferdud...@gmail.com> wrote:
>>> There's a brand new 150W laser cutter for less. ;)
>>> --
>>> You received this message because you are subscribed to the Google Groups
>>> "i3 Detroit Public" group.
>>> To post to this group, send email to i3detroit-public@googlegroups.com.
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>>> i3detroit-public+unsubscribe@googlegroups.com.
>>> For more options, visit this group at
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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
>> --
>> You received this message because you are subscribed to the Google Groups
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> -- > You received this message because you are subscribed to the Google Groups "i3 Detroit Public" group.
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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
On Wed, Nov 14, 2012 at 8:25 PM, Keith Mc <a...@provide.net> wrote:
> 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.
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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
* <http://twitter.com/MichaelSenkow>Alumni of Mu Beta Psi
General Technics Member*
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.
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.
>> On Wed, Nov 14, 2012 at 5:47 PM, Roger S <surferdud...@gmail.com> wrote:
>>> There's a brand new 150W laser cutter for less. ;)
>>> --
>>> You received this message because you are subscribed to the Google Groups
>>> "i3 Detroit Public" group.
>>> To post to this group, send email to i3detroit-public@googlegroups.com.
>>> To unsubscribe from this group, send email to
>>> i3detroit-public+unsubscribe@googlegroups.com.
>>> For more options, visit this group at
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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
>> --
>> You received this message because you are subscribed to the Google Groups
>> "i3 Detroit Public" group.
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>>> On Wed, Nov 14, 2012 at 5:47 PM, Roger S <surferdud...@gmail.com> wrote:
>>>> There's a brand new 150W laser cutter for less. ;)
>>>> --
>>>> You received this message because you are subscribed to the Google Groups
>>>> "i3 Detroit Public" group.
>>>> To post to this group, send email to i3detroit-public@googlegroups.com.
>>>> To unsubscribe from this group, send email to
>>>> i3detroit-public+unsubscribe@googlegroups.com.
>>>> For more options, visit this group at
>>>> http://groups.google.com/group/i3detroit-public?hl=en.
>>> --
>>> -----------------------------------------------------
>>> 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
>>> --
>>> You received this message because you are subscribed to the Google Groups
>>> "i3 Detroit Public" group.
>>> To post to this group, send email to i3detroit-public@googlegroups.com.
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>> -- >> You received this message because you are subscribed to the Google Groups "i3 Detroit Public" group.
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> 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.
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.
