Motorized mobile goal clamp

While that is true we can go 5 to 6 minutes full clamping the mogo before the motor gives out. The reason why the hold wasn’t working is because we have our thing attached by a shaft collar to a standoff and the tightener that connects the standoff to the shaft collar always loosens the smallest amount to where it catches the edges of the axel.

just found an more updated version

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You could also look into motorized clamps for Tipping Point. I remember that some teams (especially ones without access to pneumatics) had built some clamps to grab mobile goals that worked quite well. Youtube might be a good place to look for some designs.

I still need help tho… All that didn’t help

What do you need help with? It doesn’t seem like there’s much more that anyone could do for you short of providing instructions.

We use a 5.5W motor with 2 sets of external 1:3 gear ratio (total of 1:9). You don’t need speed or range of motion for the mogo clamp. The motor is really there to open the clamp - (lots of) rubber bands hold it closed.

The main concepts with programing this is to first to make sure you use Motor.setStopping(Hold) and also Motor.spinToPosition(). Ideally the clamp would be at the completely lowered extent at program initialization (ie 0deg), so you don’t have to come up with any complicated initialization.

Then to raise the clamp you go to something like 45deg * external_gear_ratio.

To lower, assume you’re going to 0deg again, but of course now you will have an obstruction (hopefully).

To overcome this - use Motor.setTimeout() to something reasonable for your mechanism - you should know if you have caught anything within a couple of seconds. This prevents the motor from unnecessarily pushing down further on a captured mogo.

Finally make sure to 1) use the “wait” on the spinToPosition() and 2) do a Motor.stop(). This will now hold the motor at the angle required to hold the mogo. Combination of this and rubber bands has minimal power from the motor clamping a mogo. Don’t of course drive around with the mogo clamp open by default.

Hope this helps.

I made a motorized clamp last October heres the video of it

It is inspired by a motorized clamp I watched from Tipping point

The Gear Ratio for me isn’t enough to be able to hold the mobile goal without pressing the button in the controller that’s why I added the rubber bands, But it still can’t hold for a bit when there are 5 rings in the mobile goal so I’m gonna make some changes to it.

Just wanna share my Idea for the motorized clamp

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maybe try a mechanism that uses a worm gear with a high speed motor? it wouldn’t be very fast but it should work, and would prevent overheating (since worm gears cant be backdriven).

ESTA ES MUUUUUUUUYYYYYY DIFICIL!!!
“This is very difficult”

Clamps can go both ways.

Can you use rubber bands to provide the clamp force, then only use the motor to release the clamp hold when picking up or putting down the goal?

Look up “over-center” locking mechanisms. I have seen a few used this year, but not too many. They were more common during tipping point. I had 2 teams use them that year. One actuated with pneumatics and the other used a motor. The advantage of them is that they stay locked (like a pair of vise grips) without force from the motor/pneumatics.

Here are a few pics I found of the motor-actuated one. This version is a bit bulky, but I have seen lighter versions (and have a team working on one now).

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What is an over-center locking mechanism and how does it work?