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Unread 29-01-2008, 01:07
Frank Neuperger Frank Neuperger is offline
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Re: 1726 Prototype Testing

Nice job. It appears that the ball develops a rearward spin with this design as it rolls off the catapult forks. This is elegant. It seemed to roll back towards the bot after the shot.

The mechanism illustration suggests an "over center" latching scheme where actuators initially pressurize with the force vector of the actuators aimed just below center of the mechnism fulcrum. As such it will not fire unless somthing bumps them above the fulcrum. Possibly the small gizmo at the far left of the illustration does this. Getting both actuators "over center" at the same time may be a challenge due to build tolerances and mechanism flex.

I wonder about the shot to shot repeatability in terms of height and trajectory. To be shooting on the move, the shot to shot repeatability would be important.
 


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