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Author Topic: Working towards a new season of festivals.  (Read 1147 times)
Miranda.T
Zeppelin Captain
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United Kingdom United Kingdom



« Reply #50 on: December 07, 2017, 11:45:12 pm »

Thank you, Hektor Plasm.
Now it is starting to get even more interesting.

The stunt buggy authopsy is done. Cheesy
It seems like the motor that makes the front wheels spin has a slower, but stronger ratio than the rear wheels.
I have a second buggy, so I can use two of the same motors.

Next up, trying to figure out how to connect the strings to the motors.

Could the translucent tyres be removed? The red hubs look like they could work as spindles. I've used cotton reels before for something similar and attached the string by simply drilling into it aned putting in a small wood screw to tie the string onto.

Yours,
Miranda.
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bicyclebuilder
Zeppelin Overlord
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Netherlands Netherlands


A.K.A. Scanner Camera Builder


« Reply #51 on: December 08, 2017, 06:23:06 pm »

It doesn't work. The motors are just not strong enough and the strings have a irregulair slack that makes it tangle around the hubs.  Sad
All I can do now is concentrate on the head and it's movable parts, and to make it as live-like as possible.
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The best way to learn is by personal experience.
bicyclebuilder
Zeppelin Overlord
*******
Netherlands Netherlands


A.K.A. Scanner Camera Builder


« Reply #52 on: December 09, 2017, 05:32:59 pm »

I've made a good start on the head.

The little red balls are levers that can slide back and forth along the head handle.
The balls are attached to metal rods that run through plastic straws, to the inside of the head.
Later these rods are going to move the ears, eyebrows and lips.
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Hektor Plasm
Zeppelin Captain
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United Kingdom United Kingdom


All-Round Oddfellow.


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« Reply #53 on: December 09, 2017, 07:34:27 pm »

Oh - I wasn't expecting that! How fascinating. I can't wait to see the finished doggy, but the process is so interesting, I don't really want it to stop either!  Wink

As the motor/ string idea didn't work, is there any way to use levers for the legs? I don't know much about marionettes and so forth, but perhaps
the old Pinocchio style of strings might work somehow?

HP
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"all die! o, the embarrassment."
H Plasm Esq. ICUE    Avatar by and with kind permission of Dr Geof. Ta!!

Some musings:-
http://hektorplasm.blogspot.co.uk/
Miranda.T
Zeppelin Captain
*****
United Kingdom United Kingdom



« Reply #54 on: December 09, 2017, 08:27:47 pm »

It doesn't work. The motors are just not strong enough and the strings have a irregulair slack that makes it tangle around the hubs.  Sad
All I can do now is concentrate on the head and it's movable parts, and to make it as live-like as possible.


Unfortunately the type of motors used in toys can be rather weak. If you decide to give the motor option another try it might be worth looking at the type sold for model robotics as they have a lot more torque. Alternatively, what about doubling up the motors you currently have - use two to drive one spindle? As for irregular slack, might it be possible to build a tensioning spindle along the lines of that used in a bicycle's gearing?

Yours,
Miranda.
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bicyclebuilder
Zeppelin Overlord
*******
Netherlands Netherlands


A.K.A. Scanner Camera Builder


« Reply #55 on: December 09, 2017, 09:22:48 pm »

I am going to use the string mechanism on the legs, but not for walking.
I'm going to put keyrings on each leg-string to manually move each leg seperate.
This way I can make it lift all legs when I want to. For instance while sitting, letting it "shake".

Meanwhile I've managed to make the ears move and move the mouth.
The metal wire works pretty good on short distances. With a drinking straw as an outer cable, it works verry well!
video-1512849753 by Steven Langewouters, on Flickr
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MWBailey
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United States United States


"This is the sort of thing no-one ever believes"

rtafStElmo
« Reply #56 on: Today at 12:12:36 am »

Hmmmm...
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