View Full Version : Robot Goal Grabber Release
Clark Gilbert
03-03-2002, 10:47
Out of all the goal grabbing robots out there (i know there's a lot)...
How many of your robots can actually grab a goal then release it when you want to?
David Kelly
03-03-2002, 10:55
we can release by pnumatics
Matt Reiland
03-03-2002, 11:08
Our locking mechanism releases with a servo
Ian Mackenzie
03-03-2002, 12:08
Our goal grabber can release, although it's designed so that it cannot be forced to. We use the same piston to release as to grab (we thought that if we tried to simply spring it back then it might not have enough force to release if, say, another robot was pulling on the goal at the time).
-Ian Mackenzie
Team 188, Woburn Robotics (Blizzard)
Woburn Robotics (http://www.team188.com)
Mike Norton
03-03-2002, 12:32
We have two type of grabber one that does and one that does not.
what do we vote for yes or no there is no both.
this grabber holds on til the end
http://www.valleytech.k12.ma.us/Robotics/images/2002%20Claw.jpg
this one grabs and releases goals or robots
http://www.valleytech.k12.ma.us/Robotics/images/2002%20Grabber.jpg
Unless you break through aluminum... there's no chance of getting our robot's grabbers to release by force... That's because they're not powered by motors. They actually wedge between the pipes... very powerful design. (pic (http://www.aasd.k12.wi.us/east/first/images/tobor5.jpg))
Of course we can still release a goal at the push of a button...
Ragin_Kage
03-03-2002, 16:14
Our team can grab three goals and release them. Our front grabber is mechanically locked and released, and the two side "Battle Axes" are just 'on the fly' grabbers
see the pics
http://middlesexboro.net/powercord/pictures/robot05.jpg
http://middlesexboro.net/powercord/pictures/138.JPG
http://middlesexboro.net/powercord/pictures/146.JPG
they are older pics of the bot, but serve the purpose of explanation
Nate Smith
03-03-2002, 16:23
Originally posted by ianmackenzie
Our goal grabber can release, although it's designed so that it cannot be forced to.
Same here...more to be seen at Great Lakes in a couple weeks...
http://www.startateam.com/639/pics/2002_goal_grabber_5.jpg
http://www.startateam.com/639/movies/2002_norwich.mpg
We can release with both our grabbers. These grabbers are designed to take the full load of the goal :)
And I dont think this will release on it's own, maybe im wrong.
Greg
are Goal docker releases with a servos!! "Like a charm ":D
Pnupatically powered grab and release mechanisim.
MattB703
04-03-2002, 07:49
I'm sure most of us have thought of this but I'll point it out anyway.
At the end of the match we will need to release the goal without the benefit of the robot being powered up.
Mike Norton
04-03-2002, 09:57
it is call teather. bring your controls quick to the field and teather the robot. you have 1 min to do all this. It should be easy because the control man after the match has about 1 min to break down before they let you on the field to get the robot.
Greg Ross
04-03-2002, 12:44
Originally posted by Mike Norton
it is call teather....Well almost. It rhymes with weather, but there's no 'a'. It's a tether.:)
Joe Ross
04-03-2002, 12:48
I don't think releasing should be an issue for most teams. If you are using pneumatics with a single solenoid, it will most likely (if you wired it right) release when the control system is disabled. If you are using a double solenoid, you can vent the pneumatic's system.
The only other mechanism teams seem to be using is a solenoid, or some type of spring mechanism, which should be easy enough to release when you tug on the right parts ;)
Mike Norton
04-03-2002, 13:42
but there's no 'a'. It's a tether
I am sorry about my spelling. But if you want to do math:D
MattB703
04-03-2002, 13:43
I only mentioned it because it was an issue with our team. We are driving our goal grabber with a lead screw and we will need to tether our bot to un-latch.
Our grabber can't release a goal once it is locked on -- but we can release the grabber.
Mike Norton
04-03-2002, 14:00
I only mentioned it because it was an issue with our team. We are driving our goal grabber with a lead screw and we will need to tether our bot to un-latch.
take a look at this one. we have the same thing.
http://www.valleytech.k12.ma.us/robotics/images/2002%20Grabber1.jpg
lals_is_da_ish
04-03-2002, 20:16
not only can we grab and release goals with ease, we can also grab drag and release other robots with no effort at all!
Our mechanism is controlled by a window motor, allowing us to grab and release easily. We can also grab without power to the window motors, we just can't release.
Thomas Grupp
05-03-2002, 19:13
We Can Grab And release as many times as we want to.
See our robot (http://www.cherryweb.com/circuitstompers) :D
nuggetsyl
06-03-2002, 09:06
I guess teams that can not release are not planing to go back home for the 10 pts or have a mini me
Ken Delaney
22-03-2002, 02:22
We can grab two goals and release each one individually. The claws grab automatically when the strike one of the pipes. The claws can easily be removed when not powered up. The claw's grip is super powerful.
Ken Delaney
Coach Team 357
...dare to do mighty things...
You can always shift the position of a pneumatic solenoid valve, whether single or double, by pushing the orange "manual override" button.
we can release but usually we don't grab a goal we just push it and go back for another. If were taking it from someone or pulling it then we will grab it.
Matt Attallah
24-03-2002, 09:40
We can grab, but when we do, we don't release, and we even have a hard time to get it off! We use 2 cams to pinch the pole in a very, very tight space, but we can ram the goal from any angle, and still latch!
Alex Forest
24-03-2002, 20:11
we can grab and release....well we always have been able to up until our last match in finals....the servo broke!!!
Scottie2Hottie
24-03-2002, 20:39
We as a team spent probably 2 and a half hours discussing our grabbing mechanism (the technical term of course) and after all that our machinist came to us and said why dont you just use a hook, and thus the God-like shephard's hook of 862 was born, easy on easy off, the only thing on our robot that seemed to work well a GLR oh well
Gary Stearns
26-03-2002, 12:30
We can release too with a spring loaded servo, (same one that deploys the claw)
Some of the bots out there look like they could pull a Semi !!
I'm Just scared that I'll see it on the Big Screen dismembered still clutching the goal!!
TEAM 236 !!!
TECHNO TICKS!!!!
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