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Re: High IMA Pulley Task
Posted: September 12th, 2017, 11:11 am
by ScottMaurer19
Unome wrote:raxu wrote:There is a pulley system I remember from Compound Machines that use few pulleys to get an arbitrarily high IMA:
Differential Pulley. I did a description in the scioly wiki Compound Machine page.
There are a few drawbacks though: it is harder to build, requiring the wheel and axle-like structure. Additionally, the supervisor may not familiar with the setup and does not see how it can have IMA>=7. The benefit is the low number of pulleys used!
It's an interesting idea. However, it would also be a little harder to implement due to the difficulty of pulling on it, whereas with a regular pulley you just drop an object 70 cm to pull the weight up 10 cm.
Edit: Nevermind, that's not possible. The dropped object would definitely have to roll down a ramp or something, since the device's maximum height is 60 cm.
Use a spool and a motor triggered by a switch.
Re: High IMA Pulley Task
Posted: November 22nd, 2017, 10:02 am
by ftf841
Would using 2 pulleys chained together by a timing belt or something similar be allowed, and would it count towards the mechanical advantage? For example, something like this?
http://www.designatronics.com/images/ce ... stance.jpg
Re: High IMA Pulley Task
Posted: November 23rd, 2017, 8:38 am
by ScottMaurer19
I don't know much about IMA of gears but the design you sent wouldn't, IMO, count towards the pulleys. If you have the same set up as you sent but with the timing belt not in a closed loop so that you could pull on the end and have it act as a standard pulley system then it would count.
Nonetheless an interesting idea and I'm curious to see what others would think.
Re: High IMA Pulley Task
Posted: November 23rd, 2017, 10:12 am
by PM2017
Springs are allowed as long as they don't exceed 10 seconds right?
Couldn't we just use a constant force spring that is held in a state of high potential energy, and when he magnet is released, it coils up, turning a wheel, which winds up the string?
Also, if this works, will the wheel and axle IMA be included in the IMA of the pulley?
Re: High IMA Pulley Task
Posted: November 26th, 2017, 6:50 pm
by aniSUKSatCHEM
Can the ASL be typed? Or does it have to be handwritten?
Re: High IMA Pulley Task
Posted: November 27th, 2017, 10:55 am
by tinyperson
Re: High IMA Pulley Task
Posted: November 27th, 2017, 11:33 am
by scioly2012
That does appear to have an IMA of 7, yes.
Re: High IMA Pulley Task
Posted: November 29th, 2017, 4:16 pm
by davecutting
I'm using a 3D printed block and tackle similar to that...
Re: High IMA Pulley Task
Posted: December 4th, 2017, 7:09 am
by PM2017
I had asked this earlier, but it sort of got smothered, so I'll ask again:
PM2017 wrote:Springs are allowed as long as they don't exceed 10 seconds right?
Couldn't we just use a constant force spring that is held in a state of high potential energy, and when he magnet is released, it coils up, turning a wheel, which winds up the string?
Also, if this works, will the wheel and axle IMA be included in the IMA of the pulley?
Re: High IMA Pulley Task
Posted: December 4th, 2017, 7:31 pm
by Snarknado
aniSUKSatCHEM wrote:Can the ASL be typed? Or does it have to be handwritten?
I'd imagine typed would be preferable. But I think you'd be okay either way as long as the format (not released yet to my knowledge) is correct.
