How's your ramp?

[Chris_Elston]

Originally Posted by Kevin Sevcik

Chris,

I suspect he means detachable, as in, "we don't need a crazy huge ramp this round, let's take it off the robot and run without it."

ah ok...I get it... yeah that makes sense now. Thanks!

[NoSkaOnTheRadio]

team 1757 is designing an ambitious pair of pneumatic driven scissor lifts under a pair of "wings". if all goes well, we should be able to lift both of our teammates to the full 12", but i can't make any garauntees!

[Ericgehrken]

How are you going to take 20 psi pneumatic cylinders and lift up 2 120 pound robots?

[waialua359]

Originally Posted by firstbots195

How are you going to take 20 psi pneumatic cylinders and lift up 2 120 pound robots?

now, that my friend, is a good question? Our thoughts also.

[Madison]

Originally Posted by firstbots195

How are you going to take 20 psi pneumatic cylinders and lift up 2 120 pound robots?

The operating pressure of the pneumatics system can be as high as 60 PSI at the pistons. It's quite plausible that a properly sized piston can be used to actuate a lift.

[lopz056]

well our team 1388 was thinkin of putting two ramps off each side of our robot so two robots can drive up each side, and have a spring loaded bar that pops up hopefully a foot up the ramp. so when the other robots drive up the ramp and the bar will pop up as to keep the robot from sliding back down when the power turns off, so that way you can hold two robots at a foot each, but i dont know what ur design is like

[waialua359]

we thought about that as well, in general. However, as we are anticipating a weight problem already, we are just shooting for 45 out of 60.

[Gary Dillard]

Originally Posted by M. Krass

The operating pressure of the pneumatics system can be as high as 60 PSI at the pistons. It's quite plausible that a properly sized piston can be used to actuate a lift.

Do you get extra points if you do it fast enough that your alliance partners catch air?

[Donut]

We look to be adding ramps along the front in such a way that our robot provides about half of the platform for our partners, and a seperate platform provides the other part.

Of course, we're focusing on our arm first, so if we don't have enough weight we'll toss off the ramps and go arm only.

[Jeremiah H]

We are in the process of designing a forklift-type lift mechanism that would hinge down to be level with the top of our bot (13" fromthe ground) at the end of the match. The prongs on the lift that hold the pool tubes during play would be the proper length to support it. We are going to have a ramp fold down in the back that will allow our alliance partners that are narrow & long to drive up onto our bot and then on across onto the back of the forks. We also probably will have a ramp out the side, so that the occasional wide & short bot can get up behind the first. in the case of two long bots, one would just follow the other up. In our preliminary figures, the forks will be 50 some inches long, which allows for very comfortable space for the other bots' bumpers. It looks like our forks are going to be 5" wide. I personally think that this will be plenty wide enough for a competent driver to get and stay on. The issue right now is finalizing the actual lift design with a pivot at the base.

[sojouner06]

One design being drawn out right now for our team is a 4-bar mechanism on each side of the robot, starting out collapsed. then, you could say the vertical legs, will be pushed upwards each by 2 2in bore 8 in stroke cylinders. Its more promising than a ramp because it gives more space for the arm than an accordian ramp design, A drawing can give you a better picture as to why, but i do not have one at the moment.

[1768]

We did some calculations today and found you can just barely lift 2 170lbs. robots with 4 pneumatic tanks and 4 2" bore pistons (2 on each side of the robot) at 60 psi. We've decided to use 6 pistons to overengineer the mechanisms. If our calculations are correct, everything should run smoothly.