Quote:
Originally Posted by loafdog
Hi,
We don't plan on using pneumatics on our robot so I was looking for ideas that used something else to control/move a mechanism that would brake/stop elevator.
I was wondering if servos can be used to control brakes or some other kind of anti-backdrive component. Poking around andymark I saw shifting gearboxes controlled by servos for example. I've seen people on CD discuss bike brakes, ratchets, etc..
But I haven't seen anyone discuss how you can implement these ideas. Anyone done this before and have details/pics they can share?
(note, I'm not a mechanical type.. i do software, just trying to get ideas to share with my team).
THanks.
-Maciej
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Look at HOT's tech notes and see how they used a motor, I believe it was a window motor, to actuate their shifting. You can do a linkage that actuates the bike disc break on something like a cam.
I don't know what your gearbox ratio is to do your lifting or how much you wan't to lift but I would strongly suggest looking at your motors used, gear ratios, and power consumption to see if you can hold is strictly with programming which would be stalling the motor. For something like a cim, it wouldn't be as big of a deal to stall under the right loads compared to something like a 550 or 775 that relies on the turning of the shaft to cool it. There are some pretty good papers on Chief already talking about thermal mass and such.
-Ronnie