Hello, I am a snr in college persuing a Mechanical Engineering degreeand a classmate and I have decided to enter a nation wide competion.
Rules are: size must not exceed dimension of 6" x 6" x 14.5". We have a total of 4 minutes to complete the task of picking up 6 rocks on the course and deliever them to a target at the end.
Scroring: Weight of vehicle, battery cappacity, time to complete. Transmitter and vehicle must fit in box with the dimension above.
Twist: Course has 4"x4" beams across it that vehicle must cross, surface is unknown, transmitter and vehicle must fit in box with the dimensions above.
Our way of completing task: robot has arm with a ‘claw mechinism’ (not in solidworks yet), picks up rocks then slide down arm to holding bin. At end of course the robot open rear hatch and rocks release.
Pics:
i31.photobucket.com/albums/c381/2timen/robot/th_bottomproto2.jpg
i31.photobucket.com/albums/c381/2timen/robot/th_course.jpg
i31.photobucket.com/albums/c381/2timen/robot/th_proto2.jpg
i31.photobucket.com/albums/c381/2timen/robot/th_wheel2.jpg
Here is a video of our robot with some wheels that we made on the 3-d printer. Specs are 5 inches in dia. New wheels will be 5.75" and have less ‘spikes’ to climb with so we dont have to use arm to get over the obsticales. And also a different motor combo will be used later.
youtube.com/watch?v=tIHM1gheWi4&feature=channel_page
Let me know what ya think!!
-Keith
Question: In the video we were using a bettle 104:1 motor
rpm = 155
torque = 250 oz-in
weight = 2.5 oz
was thinking of buying a copal 60:1 motor
rpm = 410
torque = 71
weight = .88 oz
then gearing it 10:1 on the wheel for an overal 40 rpm approx.
I am having a hard time finding a motor that are already geared way down but still have a good amount of torque and low weight. Anyone know of a place that sells these? If not we still continue with the design of using the copal 60:1 motors with the external gearing.
-Keith
