@sohail Unfortunately that is beyond the scope of this article. There are test benches on the market where you can obtain the thrust of a motor + propeller combination.
Sirā¦I have designed a robot car of weight 10 kgā¦And I have purchased four 12 vdc geared motor of 300 rpm,0.35kgcm torque,no load current of 60mA,load current of 300mAā¦Is this motor features are sufficient for driving the 10 kg robocar.
@Nayyar That seems a bit under-powered. What torque / rpm information does the tool here give when you enter all data?
what is the required motor for:
20Kg mass
2 motors
4 wheel
radius for wheel 20 cm
power supply 24 volt
@sally simply input those values into the tool. If you keep the robotās maximum velocity at 2rpm, the motor needs to rotate at ~95-100 rpm with load. If you also keep the default incline at 20 degrees, each motor should be able to provide 1550 oz-in (111Kg-cm) or more. Thatās a fairly large robot.
I want to drive 2 dc motors,one in reverse direction,powered by a 12v battery.it is designed to handle 7kg.so kindly give the specifications(power,ampere,rpm,torque)of the motor
could you post the formula used for the calculation involving the motor sizing?
@Ahmad This goes with the following tutorial (with equations): https://www.robotshop.com/blog/en/drive-motor-sizing-tutorial-3661
Hello Sir,
I am designing a extendible working station which will have an up/down linear motion.
I think until now, all I know is i will meed two dc motors to lift this table up/down.
All I really know is the maximum weight needed to lift and it is 500 lbs, so based on this,
pls assist me on how to find a correct dc motor suitable to lift 500 lbs. i have dimensions and individual wieght of all the parts.
Waiting for your reply asap. Thanks in advance.
@Mihir You can find a nice selection of high force linear actuators here: https://www.robotshop.com/en/actuators.html
Sir , Iām trying to build stair climbing robotā¦Iām useing 6.75v battery. What kind of motor should I use?
@Vignesh Determine the slope of the stairs, and enough information to fill in the fields of the Drive Motor Sizing Tool to get an idea of the specs for the motor you need. Note that one issues with stair climbing is that you need the robot to always be in contact with at least two stairs, and have enough friction to climb (assuming tracked robot).
Rather than scaling the output (Torque and Speed) by a factor of 4 to choose the DC motor, shouldnāt we scale the output by a factor of 2 considering the linear graph between the torque and speed of the DC motor and setting the operating point right in the middle of both X and Y values?
@Devansh Can you specify where thatās used? https://www.robotshop.com/blog/en/drive-motor-sizing-tutorial-3661
If you are referring to stall being roughly four times that of continuous operating, thatās something we have found over many years. Operatin the motor at half tha stall torque for any notable period of time might burn it quite quickly.
Sir,we using two motor drivers with 12v,300rpm,1.76kg.cm And wheel diameter is 10cm.What is the robot vechicle speed at no load condition and with 5kg weight condition?please reply as soon as possible.
@nanthagopal This should help: https://www.robotshop.com/blog/en/vehicle-speed-rpm-and-wheel-diameter-finder-9786
Note that the speed under load would need the torque vs. rpm graph of that motor. You would need to calculate the torque under load.
How much margin should be taken between no-load speed and the calculated value of the RPM from the calculator?
Great job! thatās very helpful but,
why didnāt you put the friction in your considerations? it would be more reliable.
@Devansh The Angular Velocity which is calculated is with load. The no load would be (estimate) 25% higher than this. Ideally check the motor specs / datasheet.