Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: mohamed on February 26, 2008, 03:49:41 PM

Title: wheels of the 40$ robot
Post by: mohamed on February 26, 2008, 03:49:41 PM
Now after finishing the connections of the robot and i did the body also when i mount the wheels the robot didnt move i dont know why i thought its the weight but i'm putting the cercuit at the front and the motors at the back with the battery or is it the friction
could anyone tell me that is the problem here?
PS:here is a pic for the robot and a pic for the wheel i used
Title: Re: wheels of the 40$ robot
Post by: airman00 on February 26, 2008, 07:09:26 PM
do the motors spin at all?
Title: Re: wheels of the 40$ robot
Post by: mohamed on February 27, 2008, 12:18:45 AM
yea if the wheels didnt touch the surface of the ground they rotoates
Title: Re: wheels of the 40$ robot
Post by: Pratheek on February 27, 2008, 05:44:56 AM
What are the ratings of the motors you are using(the rpm and torque)?
I feel you are encountering this problem because the motors you are using are unable to provide enough torque to push the robot forward.
Title: Re: wheels of the 40$ robot
Post by: airman00 on February 27, 2008, 07:18:35 AM
it looks like there is a direct connection between DC motor and wheel

get a geared motor and then connect that to the wheel
Title: Re: wheels of the 40$ robot
Post by: mohamed on February 27, 2008, 10:33:17 AM
this is the only 12v dc motor i found in my country MMI-6S2L and i dont found anyone other than that is that ok or not?
and it says that it's RPM is 2400
Title: Re: wheels of the 40$ robot
Post by: airman00 on February 27, 2008, 11:28:35 AM
this is the only 12v dc motor i found in my country MMI-6S2L and i dont found anyone other than that is that ok or not?
and it says that it's RPM is 2400

and how much ounces per inch torque?

torque is what matters!
Title: Re: wheels of the 40$ robot
Post by: Rebelgium on February 27, 2008, 12:15:22 PM
are they motors with gearboxes connected to them?
If there are no gearboxes and you connected a motor directly to a wheel, then it can't work ofcourse...
Title: Re: wheels of the 40$ robot
Post by: mohamed on February 27, 2008, 04:00:27 PM
yea they are simply jusdt motors not with the gear box here is a pic of the motor for more detailling
Title: Re: wheels of the 40$ robot
Post by: airman00 on February 27, 2008, 04:43:03 PM
nope u need a gearbox
Title: Re: wheels of the 40$ robot
Post by: SgtToad on February 27, 2008, 05:32:14 PM
Did you only use the 9v battery to power all  your robot ?