# Thread: DC Motor - Power Problem

1. That post was overwhelming...need time to chew over that...will post back with more questions (im sure im going to have some) =)

Thanx a lot guys for all your help!!!

Cheers
Vyder =)

P.S. Ill be back!

2. ## you can use 6v motor with this gearbox

Worm gearbox is help to u to reduce speed and increase torque

aluminum worm gearbox is less in weight
and also it is with encoder.

gearbox ration is 20:1 so it can make higher torque which you are require

and size is also small

i used big gearbox for same function in SVNIT competion and NIRMA competition.

now i am going to use this gearbox in Micromouse 2008 , in techfest IIT bombay.

http://www.celeritusindia.com/productgearbox.php

3. I think this is not a motor or greabox issue.
it is a battery issue.
9V battery cant supply enough current. (usually ~300china-400mA)
(point made by Docel and Allbits.)
Thats the reason that AA cell powered car/truck toys are most common, and not 9V.

Just change the battery to -
or multiple nicd cells in series to create 9v.
if your motor is 100rpm, it will take this load, and you also get benefit of recharge.
(or even multiple AA cells.)

Good Luck!

4. 1 Kg cm of torque / 4 inch radius = 0.25 Kg cm of torque
8O

be careful with the units!!! it is a cm/inch division..
It is Kg on the right hand side, not torque.
Which simply means, the bigger the wheel radius, the less weight it can handle.

Choose the smallest diameter possible for your required speed.

5. Yes u are right allbits all units must be in inches

Some good information about building a robot

http://www.warbotsxtreme.com/Builders-Guide.htm

Best regards,

pratik

6. I didn't say all units has to be in inches.. I just meant be careful when you post equations or calculations, all units has to be the same. The dimensions should match.

#### Posting Permissions

• You may not post new threads
• You may not post replies
• You may not post attachments
• You may not edit your posts
•