wierd crank and lever transmission

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MagnusWootton

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wierd crank and lever transmission
« on: June 20, 2021, 12:01:42 pm »
Im trying and failing to get this machine to work,  its a little strange, but its equivilent of cogs spinning each other,  except done with rotating levers instead.
If you mentally take note,  then youll see every time it passes through a stage its twice as quick.       It actually travels twice as far each time, so it doubles force requirements,   so you probably wouldnt ordinarily be able to increase the hz more than say x16 times?   But if I reduce the size of each stage as it goes, it could get more than this,   but I have to get it right in the sim first,  and its taking some pretty precise measurements I cant get yet, to get it done.

So I just rendered this quick one of it sorta half working.

https://www.youtube.com/watch?v=VCWU7wkvG58
(The end of the worm/snake is alot quicker than the start.)

I dont know what the peak frequency hz rate for mechanical logic is,   but if I get this done (In open s-cad) I can find out.
As soon as I get it done, I just need a quick redesign to get it printable with living hinges, instead of pins,  (also makes it castable in a single biscuit.) and get it printed straight away.

But I just stuck in waiting for it,  need to press on.   If it gets to 100kilohertz or something u wont need an arduino anymore, and its fully plastic!
I worked on it all today,  I did get alot of bugs fixed, but im going to need maybe another couple of days.

If I get it done,  ill continue the project thread here.

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MagnusWootton

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Re: wierd crank and lever transmission
« Reply #1 on: June 21, 2021, 08:46:02 am »
I fixed it,   its fully working now.  The video cant bring it back below the 4th or so level,  its going too fast for it to play it back properly,   if the first stage is 1 hert, the final stage here (18th) is 200kilohertz,  but I dont know if itll translate to real life or not,  I have to print it out and see.
https://www.youtube.com/watch?v=dZbGCmToe1U

I had a few fixes to do,   its the same as any other programming except Im not very good at open-s-cad script, plus its all slightly new all through it, IDE wise, I had change the rotational stroke from 180 to 90,  and had to fix a few problems,  it has to be lined up perfectly, to keep rotational stroke constant as it goes along.

This is true to inverse kinematics,  and now its only going 90 degrees left to right, it probably wont jackknife or kink,  so its a good sim for a reality check...  I have to do it all again now (Only 1 more time.) and this time make it a single flat entity connected by living hinges.  (Which makes it easily castable!)   Im going to try starch+glycerine, to construct it,   but that will make it pretty weak,  might still work,    if that works it means it costs very little to pay for the liquid to constitute it.

So hopefully in a couple more days,  Ill have it done and my printer is ready to go as soon as I get it finished,  and Ill see how fast I can get mechanical movement!   Maybe electricity isnt so superior as I and many others are thinking!      If I reduce the scale of the machine as it goes faster and faster,  It may make high hertz possible,  and mechanical video games and general logic is faster than I was thinking! but I have to see to know!
« Last Edit: June 21, 2021, 12:11:30 pm by MagnusWootton »