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Thread: Liftoff (FW) build diary

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  1. #1
    Need some clarification on the build rules regarding positioning and access to the manual isolation valve on the main tank. The rules say it has to be accessible from outside, can the access be from a cutout in the bottom (baseplate) of the robot? That is, to turn on the gas supply the robot will have to be upside down...

  2. #2
    Max's Avatar
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    I wouldn't want to turn the robot upside down to turn it on, I'd be worried it would self right and so jump up and hit me in the face. Lots of people turn it on and off with a tool through the side of the robot- would this be possible? Maybe have both options of tool and access from underneath to be safe?

  3. #3
    Hmm I see, the problem is that the valve is at the fwd end of the robot, just under the flipper plate. To the side there's no access, so it can either be the bottom (easiest) or through the flipper...which is not ideal as I'll have to tear quite a large hole in it!
    Might be wrong about this, but I think there's no danger in having the robot upside down as long as the flipper plate is locked no? What I mean is, you have the robot disconnected ( link removed so no elec power), flipper arm locked, so when I open the valve nothing should happen. Then I put the robot upright, insert the link and power up, and finally remove the locking pin... would that be an acceptable procedure?

  4. #4
    I'm not to keen to accept that setup.
    Have seen how Tip Top had to be activated... scary....

  5. #5
    Got no idea how TipTop was activated, but from what I found out on the net its a HW petrol driven spinner, quite different from a FW flipper to handle...anyway wont argue with that, if its seen as dangerous way of activation I'll have to figure out another way

    Any ideas apart from putting a hole in the flipper plate?

    The valve is the one marked with an arrow
    isolation valve.jpg

    The valve is similar to this:
    http://www.ebay.co.uk/itm/2x-New-CO2...item3a7fc6eb43

  6. #6
    Argh, you're using a pin valve, not an on/off valve.
    With an on/off it would have been easy enough.
    Mount a nut or so in place of the knob, and use a socket to open the bottle from the top. Unfortunatly, it ain't an option here.

    And you're struggling for weight as is, so adding a small motor and gear to open that valve remotely ain't an option.

  7. #7
    On/Off you mean something like this?
    http://www.ebay.co.uk/itm/New-paintb...item5af8b37a3f

    I think it would still be an issue even if I had to mount a nut in place of the knob...the flipper plate stays on top of the valve so I'd still have to cut a hole through it...

    Will try to play around with the cad model to see if can somehow reposition the bottle to get the bloody valve accessible from the top or side, other than that I don't know what to do!

    And you're struggling for weight as is, so adding a small motor and gear to open that valve remotely ain't an option.
    Unfortunately you're right, weight does not permit that...

  8. #8
    Yep, that's an on/off.

    And I was thinking of angling the knob at 75° or so. Wat means you can cut a hole in the non flipper top armor and reach it that way.

  9. #9
    cant you turn the bottle 180, and mount it on an angle, could access it from the top at the back of the robot then.

  10. #10
    That could be a possibility, the only issue is that (according to my sketch up model) the valve will be close to the drive motor, very close (1.4mm). Otherwise its the best solution I can get as the valve will be accessible from the backend without the need of opening anything...

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