Lifting mecanisms

[Captain Fink]

My team is looking at a winch with some sort of telescoping mecanism to get a hook up to the top of the platform.

does this sound logical? and do any other teams have ideas for lifting their bots up on the tower?

[EricH]

Sounds reasonable.

I'd like to encourage teams this year to go back and look at the last two times there's been hanging: 2004 and 2000.

And, a tip from someone who built a robot to play the 2004 game, make sure that you can get your hook out of places you don't want it and then still hang, if you can. (Examples: the floor, another robot's lightening holes (actually happened once in 2004), the bar itself, the ball return, a tower pole...)

[Rion Atkinson]

Originally Posted by Captain Fink

My team is looking at a winch with some sort of telescoping mecanism to get a hook up to the top of the platform.

does this sound logical? and do any other teams have ideas for lifting their bots up on the tower?

You are going to need a lot of power to lift even 70 pounds up there. The process will be slow, you may have a hard time doing that within 20 seconds.

Personally, I have none at the moment. I have gone from pneumatics, to scissor lifts. I'm still considering the best way.

-Rion

[EricH]

Originally Posted by Formerly Famous

You are going to need a lot of power to lift even 70 pounds up there. The process will be slow, you may have a hard time doing that within 20 seconds.

Personally, I have none at the moment. I have gone from pneumatics, to scissor lifts. I'm still considering the best way.

-Rion

2 FPs with a stock gearbox and a 3-inch diameter winch directly connected to them is enough power to get a 130 lb robot up quickly, like inside of 10 seconds. That's hook at the bottom to robot at the top.

I've seen some other fast ways too.

(P.S. We have another CIM motor available this year, for a total of 5 maximum.)

[Rion Atkinson]

Originally Posted by EricH

2 FPs with a stock gearbox and a 3-inch diameter winch directly connected to them is enough power to get a 130 lb robot up quickly, like inside of 10 seconds. That's hook at the bottom to robot at the top.

I've seen some other fast ways too.

(P.S. We have another CIM motor available this year, for a total of 5 maximum.)

Ok. I withdraw my statement then. Now i need to look into other ways to hang the robot.
(I seemed to have over looked the extra CIM... )

-Rion

PS. Is that a typo or did I over look the weight change limit?

[EricH]

Originally Posted by Formerly Famous

Ok. I withdraw my statement then. Now i need to look into other ways to hang the robot.
(I seemed to have over looked the extra CIM... )

-Rion

PS. Is that a typo or did I over look the weight change limit?

It's not a typo. Back in 2004, there was a slightly different weight rule: 130 max, battery included (and bumpers, if you really wanted them). It wasn't until 2005 that the current 120 lbs sans battery was introduced. (Either that, or I'm a year late and it was 2003/2004 for the change.) I was basing my estimate on one particular 2004 robot.

And the extra CIM happens to be located in <R52-D>.

[Rion Atkinson]

Originally Posted by EricH

It's not a typo. Back in 2004, there was a slightly different weight rule: 130 max, battery included (and bumpers, if you really wanted them). It wasn't until 2005 that the current 120 lbs sans battery was introduced. (Either that, or I'm a year late and it was 2003/2004 for the change.) I was basing my estimate on one particular 2004 robot.

And the extra CIM happens to be located in <R52-D>.

Ah okay, now I'm not so confused.

Ah see, there is my problem. I am on <R08> at the moment. I am not an extremely fast reader...

-Rion

[Vikesrock]

150lb would be the number to use this year with full weight bot + 20lb bumper allowance + ~10 lb battery

[Fe_Will]

Originally Posted by EricH

2 FPs with a stock gearbox and a 3-inch diameter winch directly connected to them is enough power to get a 130 lb robot up quickly, like inside of 10 seconds. That's hook at the bottom to robot at the top.

I've seen some other fast ways too.

(P.S. We have another CIM motor available this year, for a total of 5 maximum.)

I preferred a van door motor direct driving a 1" spool, but we don't have that option this year. It is definitely possible to lift a 150 lb robot with motor(s), just remember to think about back driving when the power turns off at the end of the match.

[Captain Fink]

well my dad mentioned the winch on the front of a 4 wheeler to be possible, we would have to adapt it to a cim motor but it should be able to lift like 500 lbs

[ChazA]

Originally Posted by Fe_Will

just remember to think about back driving when the power turns off at the end of the match.

One could easily overcome this with a simple pneumatic locking mechanism, or even a passive tension powered lock.

[Steven Sigley]

You could also use a worm gear.

[nnfuller]

Originally Posted by Steven Sigley

You could also use a worm gear.

Remember that the more you gear down the more time it will take to lift...

[TroyCDH]

Every time I ask a serious question, I get 6 people telling me to read the manual, search the pdf, browse the FIRST site...

I have looked, read, searched, and found NOTHING on spherical chickens. Are they available from AndyMark? They were not on the kick-off inventory list.

Thanks

[Matt C]

http://media.atc.wpi.edu/News/Events...errage2004.wmv

In 2004, 190 had a telescoping arm/winch system.
The cable controlling the telescoping action was a light weight line, that only had the weight of the telescoping arm applied to it. The weight of the entire robot was lifted by a second steel cable. These were both powered/spooled by the same motor.