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kawal24
01-30-2011, 01:14 AM
hi guyz
i want to buy a high torque dc motor
i found one at sunrom electronics and the specs show that the motor gives 20 kg/cm torque at 12V
is it really so .need ur help.below is the link to the motor
http://www.sunrom.com/robotics/motors/dc-motor-150-rpm-high-torque

vikas
01-30-2011, 01:28 AM
What is your budget , The above motor is a 20 kgcm i think stall torque shich is not adequate for robo wars ( if thats ur plan ).

Look into very high torque motors ( if you wish to win ) and appropriate circuitry.

http://www.robotmarketplace.com/products/motors_geared.html

Post more details on what you wish to build in details and ur budget.

kawal24
01-30-2011, 01:40 AM
I want high torque motors for the bicycle chain tracks (homemade) and along with that am making a fire fighting robot so there will be 2 bottles filled with water,1 ltr each,on the robot

and does the motor i discussed about above really gives 20kg/cm torque ?
and one more thing i never understood what does stall torque represents .so can you tell me what does stall torque means ?..

And the ROBOTMARKETPLACE is not an indian store so shipping charges would be quite high.(had a bad experience importing parts from foreign countries) :(

vikas
01-30-2011, 01:59 AM
Bicycle chain tracks will have no traction when used, if you are planning for fun /college projects they are fine ( though ill never recommend them ) , wanna save some money... look into car timing belts.

Thats what the site owner has written ... 20kgcm

Look into this motor too

http://www.nex-robotics.com/products/motors-and-accessories/200-rpm-side-shaft-lm-series-dc-encoder-motor.html

Stall torque is basically when the motor barely moves , and its not recommend usage , take 25 % less of this as safe operating range.

I recommend importing if you wish to win something by bashing the other component out :) . Stuff available in India is not really high performance.

kawal24
01-30-2011, 11:32 AM
Am making it for fun as an hobby project and to gain knowledge
Can u give me a link to the store which sells car timing bet or atleast give me a picture ?

vikas
01-30-2011, 11:37 AM
http://www.youtube.com/watch?v=Qg7TPtNJBQI

skip to 1:48 , ull see a cheap chassis using car timing belts ( Any car part shop ) and aluminum angles ( available at glass shops )

kawal24
01-30-2011, 12:05 PM
Thnx a lot
anyway where can i post my projects .i have completed 2 robots and want to share it

streetjerk
10-15-2012, 01:17 AM
can anyone tell me is there any requirement for using protection diodes in case of BO-2 motors along with L293DNE ? if yes please specify the diode

vikas
10-15-2012, 12:04 PM
No , you do not requires diodes with L293 , It has inbuilt diodes.

streetjerk
10-15-2012, 10:14 PM
Can anyone please tell me what is the required equation for calculating the value of capacitor to be applied accross the motor of 12V ?
I've read when we reverse the polarity across motors, huge voltage spike occurs. what to do ?

anir
12-23-2012, 11:42 PM
L293D has internal diodes. So its not a necessary requirement. But saying so its always good to use 1N4001-1N4007 to stop the backflow.