Chief Delphi - 714's Winch Test

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- - 714's Winch Test (http://www.chiefdelphi.com/forums/showthread.php?t=83572)

714's Winch Test

Re: 714's Winch Test

it looks like you guys might get caught under the tunnel, unless im missing something.

Re: 714's Winch Test

is it sliding down once you get up to the top? do you have a pawl or anything to hold it in place? Once the power is off, you don't want it to fall below the platform level or you get 0 points.

Re: 714's Winch Test

Quote:

Originally Posted by JHSmentor (Post 929105)

is it sliding down once you get up to the top? do you have a pawl or anything to hold it in place? Once the power is off, you don't want it to fall below the platform level or you get 0 points.

Yes, do you have any method to prevent it from backdriving once power is shut off?

Re: 714's Winch Test

Quote:

Originally Posted by JHSmentor (Post 929105)

is it sliding down once you get up to the top? do you have a pawl or anything to hold it in place? Once the power is off, you don't want it to fall below the platform level or you get 0 points.

Well we have the solenoid for the .5" air tank set to normally open so only when the arm+winch are being moved does the braking system disengage... when off it'll be braking. In order to slide down the motors would have to spin backwards w/o power and our braking system must fail... very unlikely although possible but 7 lbs of pressure being applied to that brake and the motors resistance will do well over hold our robot in position.