We are 16 years old students and we are going to construct a 1:1 electric kart. We are going to use an electric direction in order to control it with arduino. We have found three options:
35 kg servos... Easy control for us, cheap but, would they be powerful enough? are really 35kg? what about the durability?
pinion rack with high torque 12v motor. Difficult for us to construct, medium control, more A.., medium/high durability...
linear actuators, not too expensive, ¿? difficult for us, high durability but not too high speed..
We are going to move the direction and the arduino with a 3s lipo battery
Could anyone help us? Which option do you think is the best?
We are 16 years old students and we are going to construct a 1:1 electric kart. We are going to use an electric direction in order to control it with arduino. We have found three options:
35 kg servos... Easy control for us, cheap but, would they be powerful enough? are really 35kg? what about the durability?
pinion rack with high torque 12v motor. Difficult for us to construct, medium control, more A.., medium/high durability...
linear actuators, not too expensive, ¿? difficult for us, high durability but not too high speed..
We are going to move the direction and the arduino with a 3s lipo battery
Could anyone help us? Which option do you think is the best?
Thanks!
Students learn best by trying and learning from mistakes and trying again. Each of your questions can be answered by setting up a test stand and trying the equipment. Don't make your cart first and then try things. You ask what is best, but my best will not be your best.
Good luck.
Paul
But if you're talking about the servos I think you are note that though they are often called 35kg servos their actual rating is 35kg.cm. I.e they could in theory move 35kg but only if it was on the end of an arm no more than 1cm long. It's a TORQUE rating and you need to understand what that means in order to chose correctly.
Thaks for your answer, Paul! Really, we work everyday trying and trying, making mistakes and more mistakes. In this case, there are two problems. Each mistakes costs us about 70€ and one month waiting the material... We have neither money nor time . Anyway, thanks!
Thanks Steve for your clarification. Yes, the typical airplane servos purchased from aliexpress. We don't need 35kg, maybe 10 ... but you're right ...,maybe theyŕe little weak. Thanks for your help!
If you google , there are adaptations of car windscreen motors to make large servos .
Basically take a servo apart , remove the circuit board and throw everything else away . Connect the pot connectors to a pot on your motor output , connect the servo motor connections to a h bridge circuit to drive the windscreen motor .
The jolts back through the steering tends to break normal servos, even if you can get one big enough
You need to understand how to do mechanics (the branch of physics to do with force, speed, torque etc),
and to measure/calculate your requirements for force, speed, torque for your setup. Then you won't be
guessing or making mistakes selecting motors/actuators...
So start out with the mechanical design and measurements.
