Chief Delphi - Scaling the Tower

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Re: Scaling the Tower

Quote:

Originally Posted by Robotboy12 (Post 1535091)

That may be too much!

There's no such thing as too much power! What Bruceb is referring to is a PTO shifter. Like this one from AndyMark. It allows you to use the power of your drive motors for another function.

Another idea would be to use a 775pro in a versa planetary with whatever gear ratio that you think you need. 120:1 seems like it would work. I'm not 100% sure how the 775pro would perform in that type of application, but it has plenty of power.

Re: Scaling the Tower

Quote:

Originally Posted by Robotboy12 (Post 1535069)

What is the estimated amount of power needed to lift the robot up the tower using a winch type mechanism.

That would depend on how fast you want to lift.

Robot weight in Newtons * height(meters) you are lifting your center of mass
divide by how fast you want to do it... (in seconds)

this gives you the minimum power in watts for the lift.

of course you do have some energy going to heat and friction but at least you will see the minimum amount of power you need.

You will also have to consider at what current you are running your motor(s) to determine what the power output is going to be. Look at your motor curves, etc.

At least it will put you in the ballpark.

300 watts of power can do 300 joules of work in 1 second.

If robot weighs in at 680 Newtons (around 150 lbs).... and you lift 1 meter you will need 680 Joules of work to be done.

If you do it in 10 seconds you only need 68 watts of power for that time.
If you do it in 1 second you will need 680 watts of power for that time.