I built this robot back in october (so its already taken a part) but i haven’t put the pictures up untill now
the arm on the first stage is a 75:1 gear ratio - it didn’t need to be this big just that it went to fast if i used a smaller one the second stage of the arm uses a 15:1 gear ratio the grabber uses a servo to control it very easy to build and fun to use
i wish that i would have build the arm base and chasis better than i did but i didn’t
sorry if the pictures are big it took me a awhile to compress them done so they would fit
i used six motors and two servos
4 motors were used for the wheels and 2 were used for the arm
the two servos controlled the gripper opening and closing and the other one was used turning the gripper/claw – if you are building one you almost need this axis for your gripper other wise you can’t pick up certain objects
pacoliketaco have you built a arm/grabber combo? i would like to see it if you have
the gripper was made out of steel tec parts, basically an erector set with a different name,
i think it would be easier to make it if you just cut up some vex parts the only thing i liked about steel tec was that it was painted ornage, a cool effect