Hello, I'm in a design project of a cart. i want to decide a geared motor power and RPM. but I'm in a trouble with this because I'm unable to calculate the motor with radial friction.the cart is with steel wheel and drive on steel rails. place help. Total weight cart+carrying material - 4.5 Ton Radius of wheel - 80mm Required speed of cart -0.8m/s Thank you. Udaya.
Search the web on "steel wheel rolling resistance" Calculate torque required to accelerate the cart. Make estimates on inefficiencies in gear boxes. These should point you in a productive direction. The rest of the project is up to you.
Hello Erich, Thank you very much for the reply. I want know when calculating the power of motor it must contain both force acceleration force + force again friction or any other method. I have argue in calculation force again the friction. in this case if i want to use normal rolling friction or is there any other value for static rolling friction? BR, Udaya.
Static rolling friction? Is that the equivalent of a skid when the brakes are fully applied? That's a new one... Try to ask the most accurate question you can to facilitate an accurate answer.
Here's something to start with: http://industrial.panasonic.com/ww/..._e/fa_pro_sgeard_shing1_e/ctlg_geared_e_9.pdf Regarding friction, assume that the wheels move without slipping on the rail (i.e. perfect rolling) - this is what will happen in the actual world if the moment and the acceleration are chosen correctly. choose motor torque assuming perfect rolling and choose acceleration empirically - that's the best practice. remember that when you calculate the acceleration you need take a safety margin that will allow you to have less acceleration in the real world and still get your cargo moving within the time boundaries required in the system.
