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Thread: New Project "The Politician"
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10th June 2020, 10:42 AM #1Senior Member
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New Project "The Politician"
Greetings to all, with the hope that no one has been affected by the virus which seems to lurk around every corner.
A politician, standing as they do in front of flags carefully arranged, an expensive fituout, and a suitably
large, imposing lectern, is holding forth. As they do. The figure will be 800mm tall. The work began with the head, which will eventually have eyes which move side to side and up /down, will turn and nod, the arms will gesticulate, and the body will turn and bow. That is, IF I can figure out how to do all that !
The head began as a 90mm sq block of Huon Pine, was 28 hours in the carving vice.
Carved Head.jpg
The interior is carved out to receive the eye movement mechanism
Head interior.jpg
The mechanism for the moving eyes follows, probably as a prototype, unless I get lucky with construction.
Thanks for looking,
Regards,
Gus
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10th June 2020 10:42 AM # ADSGoogle Adsense Advertisement
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10th June 2020, 08:24 PM #2
The eyes will have to be shofty Gus for a politician.
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11th June 2020, 09:50 AM #3Senior Member
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Guess so Peter ! Looking this way and the other, down mostly ?
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19th June 2020, 04:20 PM #4GOLD MEMBER
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Looking forward to this Gus. The head looks fantastic
Regards
Keith
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28th June 2020, 07:18 PM #5Senior Member
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WIP "The Politician Eyes Mechanism
The eye mechanism is complete, bar some final adjustments, 55 hours including three rejects, all learning experiments.
The front viewHead:Eyes.jpg
Mechanism,Eye mechanism.jpg
The rear, showing the cables and connecting barControl cables.jpg
Installed inside the head,Eyses Installed.jpg
A short video of how it works, not cam controlled yet, just by hand. The eyes need a bit of adjustment, the character is a little cross eyed. Maybe I leave them, there are a few cross eyed politicians..
MVI_5583.mp4
Thanks for looking,
Regards,
Gus
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1st July 2020, 10:16 AM #6GOLD MEMBER
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Top work Gus.
Soon you will be making androids for sci-fi shows
Regards
Keith
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1st July 2020, 04:44 PM #7Senior Member
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Thanks Keith ! Sometimes when walking around the workshop, I notice it looking wordlessly, it is a surprise.
By the way, that gold from Dulux is good news, the Knight brand looked good for a while, but soon looked like old brass, thank you for finding it.
Regards,
Gus
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10th July 2020, 11:10 AM #8Senior Member
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WIP Body Mechanicals
The body frame, and its control mechanisms is mostly complete. All work as they should, although moved only by hand yet, the cams which will eventually control everything are to follow. Next is making a "skeleton" which will fill out the body so the clothing will be supported.
Front View.jpg
The controls on the front,
Front.jpg
Controls on the rear,
Rear .jpg
Another view of the front and rear,
Front detail (2).jpg Rear detail (1).jpg
Skeleton work follows,
Thanks for viewing,
Regards,
Gus
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12th July 2020, 10:34 AM #9GOLD MEMBER
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Intricate , clever work Gus.
You are a master at Automata.
Great Stuff
Regards
Keith
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13th July 2020, 11:59 AM #10Senior Member
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Thank you Keith ! Please confirm if my information is true or false. Turning brass, is a back angle not neccessary on high speed tooling ?
Regards,
Gus
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13th July 2020, 02:45 PM #11GOLD MEMBER
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Gus,
Found this on - line for you. I don't turn brass. I cheat - I turn aluminium and then paint it as brass - cheaper as well. I use normal rake angle on TC tip tool.
Trouble turning brass by a very inexperienced engineer | Model Engineer
Regards
Keith
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14th July 2020, 08:37 AM #12Senior Member
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Thanks very much Keith, there is a wealth of information, just in that short discussion on the subject.
Regards,
Gus
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14th July 2020, 08:54 AM #13Senior Member
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WIP The "Skeleton"
A friend's wife has kindly offered to sew a suit for the character. Phew ! Dodged that bullet ! To flesh out the body so it can be fitted with a tailor made outfit, a series of ply bones have been attached over the frame and the mechanicals. For now, that means a pause while the sewing is completed, however long that will be.
IMG_1941.jpg IMG_1940.jpg
Thanks for viewing,
Regards,
Gus
I wish our Victorian friends on the forum safety from the marauder !
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14th July 2020, 02:17 PM #14GOLD MEMBER
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Looks great Gus.
Unfortunately some outbreaks in NSW now. All please keep safe.
Regards
Keith
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21st August 2020, 11:18 AM #15Senior Member
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WIP "The Politician" - The Engine
Having decided that the automaton must be in fully working condition prior to handing it over for dressing, I have continued with the build.
The crankshaft since the photo was taken has been replaced by a larger dia brass tube. The previous 6mm couldn't handle the torsion applied by the motor. I mark and cut the cams in pairs, one each side of the centre support. As the load increased with each two addition, it also became obvious that the motor struggled. At six cams, the need for more power became clear. A very supportive member, Poundy, kindly offered some motors he had to experiment with, an offer "too good to refuse". Due to cataract operation, I have yet to progress with that.
This photo shows the blank cams and the motor. A set of worm gears reduce the RPM from 55 to 68 seconds, perfect speed for what I imagine is ideal for the sequence. That, of course, is subject to revision, once the right motor is found.
Blank Cams.jpg
The "engine". Cams, motor housing and the cam followers. The whole assembly can be removed in one piece, the cam followers can be removed individually, and the cable attachments are adjustable for fine tension alterations. A new motor will probably require scrapping this whole "engine". But, that is the nature of making automata, and are for me the most satisfying aspects. Must be a personality flaw....
Crankshaft.jpg
Thanks for watching,
Regards,
Gus
Be Safe !
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