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  • #1

    A new comer

    Hello, im looking to build a featherweight robot as a project for uni, but im not too sure where to start. ive been reading up on the forum, to get an idea of parts to look out for. so far, i know ill have to buy a cordless drill and strip it, to get the motor, the gearbox and the battery. battery value should be 12-14.4v. itll be a great help if you guys could give me a push in the correct direction. ive also come across a section in the forum that shows a layout of the drive system, im not too sure if i could use that particular method, or if there are other methods. thank you.
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  • #2
    A new comer

    Hoi there,

    On drive lay outs, there are as much options as you can imagine. But the most used in feathers are 2 and 4 wheel drives.
    With the 4 wheel drive, the 4 wheels are in the corners.
    2Wheel drive, I opt for wheels just behind the center of gravity.

    Batterydrill drives, Never used them myself. So I cant give direct applicable advice.

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    • #3
      A new comer

      In my opinion cordless drills are great for featherweights- my robot whirlpool uses 4, 12volt drills and has more than enough pushing power.

      Heres a video of it at the London Expo last weekend pushing a 12kg beer barrel around (the batteries were running low when it was filmed) http://www.youtube.com/watch?v=Lo5dafd-MGghttp://www.youtube.com/watch?v=Lo5dafd-MGg

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      • #4
        A new comer

        Whirlpool is a quality robot.

        What speedos are in there Will?

        I like the lights.

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        • #5
          A new comer

          Thanks for the nice comments.

          We use a scorpion XL speedo in whirlpool but we have 2 small PC fans fitted to keep it cool.

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          • #6
            A new comer

            we use them little blue speedos from leo

            they have worked fine for ages now prob over a yr

            think its time to get them changed just incase they go boom in a comp soon lol

            and beauty use drill motors and is pretty powerful and speedy for what is it

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            • #7
              A new comer

              Get two or four drills-maplin do powerful 18v cordless drills for about £13.

              http://www.maplin.co.uk/Module.aspx?ModuleNo=221018&source=2001&doy=28m10http://www.maplin.co.uk/Module.aspx?...2001&doy=28m10

              You can use the batteries out of these to power your drive.

              Go to technobots and get two electronise speed controllers-

              http://www.technobots.co.uk/acatalog/Online_Catalogue_Electronize_Speed_Controllers_351 .htmlhttp://www.technobots.co.uk/acatalog...Speed_Controll ers_351.html

              While your there get the 40mhz 4ch transmitter-

              http://www.technobots.co.uk/acatalog/Online_Catalogue_4_Channel_Technobots_40MHz_251.ht mlhttp://www.technobots.co.uk/acatalog...chnobots_40MHz _251.html

              E-mail James Cooper and get some wheels off of him-whatever size you want(75mm,100mm,125mm and 150mm).These come with a nut in the wheel that just screws sraight on to your drill motors.

              Go to your local metal/plastic stockholders and get a load of polycarbonate out of the scrap bin(6mm upwards should be enough).For about £30.

              A decent robot for about £150.

              I dont think ive missed anything-but if i have im sure someone will point it out.

              Perhaps someone more exsperianced will give you better suggestions.

              Hope i helped anyway.

              Dan.

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              • #8
                A new comer

                cheers fellows

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                • #9
                  A new comer

                  all your comments helped me alot. thanks again
                  Francis

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                  • #10
                    A new comer

                    I dont know if you saw this already:

                    http://www.fightingrobots.co.uk/discus/messages/89/10050.html?1193653253http://www.fightingrobots.co.uk/disc...tml?1193653253

                    Perfect for a first feather.

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                    • #11
                      A new comer

                      cheers for that Leo.

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                      • #12
                        A new comer

                        hey guys, first of all i would like to wish you all a happy new year. i have a couple of questions regarding the feather weight robot i am building. as its a uni final year project, i have to write a source code for the pic im using. im not sure how the remote control communicates with the robot. What frequency the remote gives out for each command? and finally will each basic command i.e left turn, right turn, etc will have separate frequencies? many thanks guys.

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                        • #13
                          A new comer

                          Your remote control has a frequency that is determined by the transmitter and receiver crystal. on that frequency a order of signals is being transmitted, called channels.

                          Typically you have 2 channels for drive. 1 channel for left and right, and 1 channel for forward and reverse. If you use tank style steering it is motor 1 on one channel, and motor 2 on the second.

                          How many channels you have is determined by the Transmitter. On a third channel you can control your weapon.

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                          • #14
                            A new comer

                            http://www.mp.ttu.ee/risto/rc/electronics/radio/signal.htmhttp://www.mp.ttu.ee/risto/rc/electr...dio/signal.htm

                            This is a good site explaining the RC signal.

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                            • #15
                              A new comer

                              http://robots.freehostia.com/Circuits/CircuitsMain.htmlhttp://robots.freehostia.com/Circuits/CircuitsMain.html

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