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Originally Posted by Travis Covington
The solenoid manifold is available through SMC. We purchased ours through motion industries.
11 pistons... I will try to break it down in a fairly subtle manner. 2 for wings, 2 for center lift, 2 for rear lift, 2 for shifting  , 1 for ball grabber, 2 for elev release.
That should hold you off until sunday. We might not be fully functional as we just realized that our reduction for the arm is not sufficient... so we are trying to throw together a quick solution before sunday. See you then. |
We put a giant garage door spring on our arm so that we wouldn't have to have a huge reduction so it could move quickly, and hold its place without stalling the motor against the load.
It works really well. We only used about 1 foot of spring (before we stretched it) and it isn't that heavy.
We talked to an inspector yesterday and he didn't say anything about it. Just to be safe, we ran a steel cable through the middle and anchored it so that if some mutant witha chainsaw attacks out bot, the spring will not fly off and kill anything.
pic:
You can see, the globe motor with a 1:12 reduction off the gearbox is capable of lifting the arm when its fully extended and has a 10 pound weight on the far end (we used a concrete drill to approximate the weight of ball+claw).
However, to be nice to the motor (and because it was too quick to control well) we have since removed that little sprocket at the top and replaced it wil a big 80 tooth sprocket, which we used the drillpress and a 3in holesaw, with a 1 1/8 in holesaw to do touch up work. It looks cooler, and the arm is much happier.