Is Anyone Using Motors to Hoist themselves off the platform on the bar?

[Kevin Sevcik]

Well top secret rachets are all nifty and all, but we're using a window motor driving a winch that we bought at a boat store. If you're in a time crunch, which you must be by now, I think this is your quickest option. Just go to a boat store, look for a lightweight winch with a removeable handcrank that looks like it'll be easy to adapt the van door or window lift motor to.

[Robert Hafner]

We've got two globe motors pulling us up with an interesting pully system (something like 20 feet of chain. . .)

[ZykoN]

we are usign the van door motor, with a very unique way of pullign us up. we are suign 2 mechanisms, one is a ball screw($400 unit, thanks NOOK for the free screw ) and that drives up 1 section, that causes a system of cables to move, causign anuther part to extend, witch dose the same thign, causing another to extend. we are usign an electronic sprign pin system to hold it up after the power is cut(an idea to use a spinnign fly wheel to power it, but too heavy)

evryone seems to be usign winches.....not a winch or a chain on the whole thing

[Jonathan M.]

We're using Window motors to lift the arm up and down and a smaller motor (van door maybe?) to release the hook. The arm then muscles up using the window motor. It's efficiant and not very heavy. Today was a scrimage and we hanged very well. Other teams had problems or were too slow. However 343 was quite good at it as well. And another one I can't recall wasn't bad either.

[pras870]

My team chose to use the seat motor with a 2:1 gear reduction, works perfectly, a little slow though, but it's not comin down after we're up there

[Rickertsen2]

Alot of people seem to forget that you can use any motor depending on how you gear it. Alot of people also seem to forget that you don't have to lift yourself 9ft in the air. a cm or so will do. Why does speed really matter in this case. If you can lift yourself 1 cm in a few secs why does it matter as long as you are hanging. Perhaps i am missing somethign here.

[jacob_dilles]

we are using the same vandoor motor that lifts our arm to lift the bot. it can pull the robot ALL the way up, but we probably wont. its a pretty powerfull little motor

[OneAngryDaisy]

aight.. i don't really want to disclose all our information, but we're using a combo of 3 motors to hang. two were designed to multitask performing another function then getting us up there, and the third is our winch (window). All i can say is it takes us a second to get up there- literally. and not just on the platform or steps too (i actually shot something through the ceiling when i misgeared a motor)

[ngreen]

Originally Posted by OneAngryDaisy

and not just on the platform or steps too

You got my attention. I want to know more. I guess I will just have to wait. Such a teaser of a statement. I've been wanting to see who would take the challenge of lifting themselves without being on the platform or first step.

[OneAngryDaisy]

i'll ask my mentors if I can upload a picture of it tomorrow... even a short movie to accompany it..

[edit] hint: think Diablo 2002 or Beatty/Brazilian Machine 2003 [/edit]

[ngreen]

Originally Posted by OneAngryDaisy

i'll ask my mentors if I can upload a picture of it tomorrow... even a short movie to accompany it..

If not upload, I could make a PM trade on the agreement no one else would see. You wouldn't have a chance to see our bot til championships and I would still like to see how it works. I don't have team permission to upload pictures even though I think we should. But I can make private trades. I know it seems sneaky but I have no say.

[xxlshortys]

Okay, well back to my question and problem

We have a wench style system, with a van door motor driving the pivot arm and a fisher price motor with the plastic gearbox to drive the wench. When we attempted to pull using only the wench we were able to get half of the base off the ground before the motor started smoking, and we do not currently have a locking system of any sort to keep it suspended in the air.

We tried using the window motor to hoise ourselves with the pivot but that did not work either.

I believe we are making a different size wench and probably switching the fisher price motor.

If you ahve any more comments, suggestions, or questions i'd appreciate it with the crunch on time.

[ngreen]

You can reduce the size of your winch. If you are using the winch with the fisher-price it might not be enough.

[Joe Ross]

Originally Posted by OneAngryDaisy

All i can say is it takes us a second to get up there- literally. and not just on the platform or steps too (i actually shot something through the ceiling when i misgeared a motor)

You have verified that you meet the 10 ft/sec rule, right?

[OneAngryDaisy]

Originally Posted by Joe Ross

You have verified that you meet the 10 ft/sec rule, right?

Yes, some calculations from the end of the pole to the bar revealed that our pole moves at around 8 feet per second. However, since it is located rather high (approaching 5 feet), it takes pretty much a second to hit the bar with correct positioning on the floor.

here are some videos of the pole in action

http://www.chiefdelphi.com/forums/sh...ad.php?t=25933