Versa gear box

[dradel]

Ok so I just watched the vid with sound... So mini cims, but was said in vid that it was with versa plan at 1:1. I am wondering how you did that? Isn't the lowest reduction 3:1 in the versa? We have designed a very similar shooter. Have to test it and a linear puncher

[Munchskull]

Originally Posted by dradel

Ok so I just watched the vid with sound... So mini cims, but was said in vid that it was with versa plan at 1:1. I am wondering how you did that? Isn't the lowest reduction 3:1 in the versa? We have designed a very similar shooter. Have to test it and a linear puncher

You are right. The lowest gear stage you can get is 3:1. However it is possible to put a Versa Planetary togeather without a gear stage. That is when you get a 1:1.

[Chak]

Originally Posted by dradel

Now that the thread has been hijacked..... Anyone have an idea on the force to back drive with a 20" bar on it?

I think backdrive is about torque, not force, so it would depend on where on the arm the load would be applied.

Originally Posted by Munchskull

You are right. The lowest gear stage you can get is 3:1. However it is possible to put a Versa Planetary togeather without a gear stage. That is when you get a 1:1.

At that point, it would act more like a shaft adapter than a planetary gearbox.

[Ginger Power]

Originally Posted by Chak

At that point, it would act more like a shaft adapter than a planetary gearbox.

You have to get creative during Ri3D There is no such thing as ordering that one specialty component that you need, and it's financially impossible to plan for everything. We also wanted to put them in the versa planetaries for the adjustability in case we weren't satisfied with 1:1.

Just to be clear, running 4 inch wheels at a 1:1 ratio from a mini cim controlled down to 50% speed will stall. It needs to have that built up speed for it to intake. The great thing is, that ridiculous speed doesn't cause the wheels to slip on the boulder. If you touch it, you own it, and it makes a seriously cool sound when you intake.

[Ginger Power]

Originally Posted by dradel

Ok so I just watched the vid with sound... So mini cims, but was said in vid that it was with versa plan at 1:1. I am wondering how you did that? Isn't the lowest reduction 3:1 in the versa? We have designed a very similar shooter. Have to test it and a linear puncher

From our tests a linear punch wasn't a highly desirable option for us anyways because it lacks a long range. The boulders absorb a lot of that impact. For your wheeled shooter, I recommend using a servo with a lever attachment to kick the ball into you wheels. It has a small profile, and doesn't require you to add pneumatics.

[dradel]

How do you run a versa at 1:1? I'm confused. We have yet to use the versa boxes . Going to be a bunch of first time uses on this years robot for us.

[Libby K]

Originally Posted by Charding18

So basically it would be unwise to use the 100:1 versa gearbox to use as a winch to climb? Is it not strong enough to lift the robot or does it just have a lot of slippage?

Our FTC teams chose 100:1 VP gearboxes for their Res-Q hangers, two per robot (as has been suggested earlier in this thread.)

Before they added a secondary clip to the robot to hold it in place once it reached max height, their robot slid back quite a bit, and they don't weigh nearly as much as FRC.

You might be able to get up there, but you'll want other mechanisms making sure you have a secure hold.