Recent content by saleh2

yes, i read http://www.creativeworldindia.com/tutorials/e-learning/robotics/robotic-car/robotic-car.html, Torque T = ( F + 2R ) * r where r is radius of wheel , R is rolling resistance force, F is static friction force . so T=(uN + 2*u'N)*r where u' is rolling resistance coefficient...

if you want to buy 2 motors for 4 wheel robot, (according to my details) you choose which stepper motor ?

how much? it is need for calculating torque?

can you explain it? please correct my opinion: F= umg torque= F.r= umg.r that r is the radius of robot turn some way. centripetal force stepper motor: Primopal 80 N.cm driver: s109 (up to 4 ampere) controller: arduino mega 2560

Thank you for response. diameter of wheel is 9 cm. robot's length is 25 cm , robot's width is 25 cm robot must be move in surface like asphalt, wood, ceramic, concrete, etc... so friction Coefficient can be vary from 0.3 to 1. stepper motors are driven by s109 stepper driver that have Tushiba...

Hi everybody I have 4 wheel robot like car . 2 stepper motors that one is in front and other is in rear of robot and these motors directly connected to wheels. so two of other wheels is not connected to motors. this robot move straight and curve. i want to find the formula that calculate...