Rack and Pinion Task
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Re: Rack and Pinion Task
Do you have to have the same number of "rifts" on your rack as your gear? My current gear has about 25 "spikes", while my rack has 12.
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Re: Rack and Pinion Task
mcmastercar sells a number of rack and pinion gears. we just got ours and they work great
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Re: Rack and Pinion Task
that does not matter. as long as the distance between the "spikes" are the same, it should workGoNerdHerd wrote:Do you have to have the same number of "rifts" on your rack as your gear? My current gear has about 25 "spikes", while my rack has 12.
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Re: Rack and Pinion Task
Would belt drive be considered rack and pinion gear? I took apart a printer today, and got the the belt drive out of it, it looks exactly like a rack and pinion gear system except the belt that has the gearing teeth is flexible and it is in contact with the top and bottom of the running gear.
Last edited by hogger on March 4th, 2012, 6:47 am, edited 1 time in total.
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Re: Rack and Pinion Task
yeshogger wrote:Would belt drive be considered rack and pinion gear? I took apart a printer today, and got the the belt drive out of it, it looks exactly link a rack and pinion gear except the belt with that has the gearing teeth is flexible and it is in contact with the top and bottom of the running gear.
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Re: Rack and Pinion Task
Well, that simple "Yes" can open a huge can of worms and ruin someone's day.
If you use the belt and associated gear to move something linearly, fine. Fabulously inexpensive, too. Compared to $6 for 20cm of Kelvin track.
BUT
Use the belt in its as-built purpose (non-slip V-belt) and just spin a gear, and you no longer have a rack & pinion.
As an event sup, I'll be looking for one of the following three:
A rack moving linearly, turning a stationary pinion gear
A stationary turning gear moving a rack linearly.
A stationary rack upon which a gear moves linearly down the track
PLUS:
The operation of one of the three above CAUSING the next action/step/whatever.
REMEMBER that it's the SETUP and USE of the component(s) that determines what simple machine is being used.
If you use the belt and associated gear to move something linearly, fine. Fabulously inexpensive, too. Compared to $6 for 20cm of Kelvin track.
BUT
Use the belt in its as-built purpose (non-slip V-belt) and just spin a gear, and you no longer have a rack & pinion.
As an event sup, I'll be looking for one of the following three:
A rack moving linearly, turning a stationary pinion gear
A stationary turning gear moving a rack linearly.
A stationary rack upon which a gear moves linearly down the track
PLUS:
The operation of one of the three above CAUSING the next action/step/whatever.
REMEMBER that it's the SETUP and USE of the component(s) that determines what simple machine is being used.
Last edited by Fester on March 4th, 2012, 3:51 pm, edited 1 time in total.
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Re: Rack and Pinion Task
Yes, please be careful. I didn't properly know the definition of rack and pinion, and I used a chain drive and didn't get points for it at the competition.
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