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Thread: Pneumatics for my axe

  1. 25th July 2008, 13:23 #31
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    I looked on ebay and all the bore sizes are to small...so what about these?

    http://www.pneu-store.co.uk/acatalog/Pneu_Store_Webshop_CDG1_925.htmlhttp://www.pneu-store.co.uk/acatalog..._CDG1_925.html

    CDG1BN80-150
    Standard Type Double Acting, Single Rod

    Price: £102.77 / Euro129.83 (Excluding: VAT at 17.5%)

    Does that mean its 80mm bore and 150mm stroke?
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  2. 25th July 2008, 15:23 #32
    Member
    I should expect so, but with those prices, and that brand it seems doubtfull.

    SMC is good stuff.
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  3. 25th July 2008, 16:39 #33
    leorcc's Avatar
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    Bore 80mm stroke 150mm that is correct. It says so in their documentation.
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  4. 25th July 2008, 17:12 #34
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    Thanks for the help.
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  5. 25th July 2008, 18:13 #35
    Member
    I looked on ebay and all the bore sizes are to small

    http://cgi.ebay.co.uk/Festo-Double-Acting-Compact-Cylinder-80mm-Bore-80mm-Stk_W0QQitemZ130181963557QQcmdZViewItem?hash=item1 30181963557&_trksid=p3286.m14.l1318    http://cgi.ebay.co.uk/Festo-Double-A...re-80mm-Stk_W0 QQitemZ130181963557QQcmdZViewItem?hash=item1301819 63557&_trksid=p3286.m14.l1318
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  6. 25th July 2008, 18:23 #36
    geeza's Avatar
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    Leave it to the master.
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  7. 25th July 2008, 18:46 #37
    Guest
    Thanks for that one Woody.

    Looking for more like 125-150mm stroke though.

    Thanks anyway.
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  8. 25th July 2008, 22:39 #38
    Member
    Dan,

    Your building a feather not a middleweight.
    I think your going to get into all sorts of probs with such a big ram.

    Do some sums on co2 consumption and the energy your Axe mech could possibly use before sending you Bot over Axe Head.

    http://www.roboticgladiator.com/tutorials/ax1.html    http://www.roboticgladiator.com/tutorials/ax1.html

    Perhaps John will step in with some guidance for you.... he posted a quick math guide for Axe acceleration and energy the RFL Forum.
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  9. 25th July 2008, 22:41 #39
    Guest
    Ok,Woody.

    Do you mean weight problems?

    Thanks for the link.

    BTW i worked out on a pressure calculator that i would get 512 kg of force,is that good?

    Cheers.

    (Message edited by dan_boulton on July 25, 200
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  10. 25th July 2008, 23:39 #40
    Member
    Weight of ram and axe mech ... CO2 Gas consumption = weight / mass of liquid co2 / size of required bottle etc ...all problems to be taken into account before buying things that will be no good to you.

    The max velocity / accel of the head mass at a given distance is goverened by your rams force.

    Once you get up to around 2 kJoules, a heavyweight robot would generally start jumping off the ground rather a lot.

    Quick calc for your proposed ram.

    Energy is force multiplied by distance in Newton Metres ...convert units
    512kgs force = 5017 newtons
    ram stroke 150mm
    E = 5017 N * 0.15 m = 752.55 Nm or Joules
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