Back Clamp Help

No problem! Just ask anytime if you would like any more info on my bot!

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Heyo whats up
Good seeing you yesterday

I just finished my design of this a few hours ago and it worked perfectly first try. I dont have any pictures of it actually holding a goal right now but I’ll send one on monday when I have access to the bot. For now here is a really bad picture of what it looked like yesterday before I was completely finished with it.

(Btw thank you so much for the idea, I ran a practice match with a couple of my sister teams as well as a skills match and this thing was amazing. It saved me during the matches and allowed me to up my driver skills score by 40 points.)

Edit: oh and also I forgot to mention, i used 12:84 gearing and this thing is strong. I had my coach who can probably pick up like 60 pounds grab onto a mobile goal that I had in here and try and pull it out but he couldn’t even move it around all he did was drag the bot (I was driving the bot forward to counteract his pulling and he still dragged it a few inches trying to get it out so its really strong). Also not only that but this works perfectly for everything else as well. It gets it about half an inch off of the ground which is plenty enough to not drag even when climbing, plus having a goal back here lowers the center of gravity of the bot and acts as a counterweight if we are lifting a goal all the way up in our front claw. It also tilts goals at about a 20º-30º angle which makes it almost impossible for another team to grab onto the goal while we have it.

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THIS LOOKS AMAZING!!! So glad i could help! It looks a whole lot more compact than mine does, honestly might redo mine to look similar :wink: Anyways once again im super glad i could help out!

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It is definitely much more compact. Here is an image of my chassis from the underside to show more of the design.


I was limited on space since I have all 4 of my drive motors in the back and my crossbars come back so far on the bot. I probably had about 13-15 holes on a c channel of room in between the motors and I had 12 from the size limit to my first crossbar. The 3 wide c-channel used to mount the motor underneath doesnt need to be so long its just all I had. The motor is mounted via a plate that is screwed onto the opposite side of that 3 wide c-channel. It spins the 12 tooth piñon which then spins the 84 tooth green gear which utilizes the standoff pulling the hook from your design but it only uses one standoff in order to save room needed on width which you can see in the other picture here:

In addition to that I have the upright beams of the clamp closer together to save room with the lip for the bottom of the base stretching out far enough to secure the goal. Since this picture was taken I have removed the extra ½ inch standoffs that I had going from the longer standoffs to the uprights in order to make the bot fit in the size limit. If you have any questions on what else I changed from your design or how I made it more compact just let me know and I’ll be happy to answer them.

Oh and by the way if you mount the motor that spins the pinon gear, on the side of the green gear that is farthest away from the claw (yours is on the side closest to the claw mine is farther) It does away with the need for rubber bands and should also make it so you dont need the bars stretching out to stop the claw from tilting down that I asked about in a previous post. Also I would recommend using my hook design that you can see a drawing of here as it will create a more secure hold on the goal than the hook you have right now with the stands offs (essentially the hook you have is better for pneumatic powered clamps the one I have is better for motorized ones).

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I’m late but @Stellae_Luna and @HazeL your motorized clamps look dope.

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And your pneumatic one is amazing as well

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sorry to bother you, but how does the clamp tilt again?

do you have another side angle of how it looks like? very interesting design btw :))))

Not at the moment but I’ll get some more today. I’ll post them here but if you want more info after that just pm me :slight_smile:

Yoo thanks for all of this btw, I was working on making it tilt with a motor and your idea looks sick. I’m going to try it out later today.

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It’s really weird to explain, if you don’t get it from reading this

Then you probably still won’t get it if I go into more detail about it. Tomorrow I will try and get a video of it in action if i can remember, but I am very busy with other things at the moment with my state tournament coming in 2 weeks

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It looks to be the same as this, if a video is helpful:
2775J Mogo Mech

Hey Josh I was trying out your two-piston clamp and tilt for the back mogo. It works really well for clamping and tilting, but the angle changes after the first attempt. How do I ensure that the clamp is at the right angle for clamping after the first release? Also, what are you rubberbanding in your design?

What do you mean by “the angle changes”? We rubberbanded the clamp open and the bottom
of the clamp back.

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