Author Topic: DC Motor  (Read 5305 times)

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Offline gan02340765Topic starter

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DC Motor
« on: January 29, 2008, 04:08:16 AM »
any DC motor suggestion that have stall torque 10Kg above expect AME motor, coz its speed too slow...

Offline SmAsH

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Re: DC Motor
« Reply #1 on: January 29, 2008, 04:13:13 AM »
10KG!!! are you serious!?  :'( oyyy ive never heard of such a thing.
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Offline gan02340765Topic starter

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Re: DC Motor
« Reply #2 on: January 29, 2008, 05:06:44 AM »
really one ...the competiton quite stupid one ...10Kg and 50cm*50cm
quite big and heavy...i need a high torque and speed DC motor ..

Offline gamefreak

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Re: DC Motor
« Reply #3 on: January 29, 2008, 06:39:53 AM »
lol, too slow, high torque is going to be slow, you could try getting two 5 kg motors and have them run the same load.
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Offline paulstreats

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Re: DC Motor
« Reply #4 on: January 29, 2008, 07:10:29 AM »
What about motors in washing machines?

Offline SmAsH

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Re: DC Motor
« Reply #5 on: January 29, 2008, 02:54:11 PM »
good point...or a treadmill..theyre fast and can move someone up to 140KG
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Offline ed1380

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Re: DC Motor
« Reply #6 on: January 29, 2008, 02:55:55 PM »
those motors (washing machine, rteadmill) are AC. a powerful dc motor will be something from a wheelchair motor to a windshield wiper motor
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Offline airman00

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Re: DC Motor
« Reply #7 on: January 29, 2008, 06:18:40 PM »
wheelchair motors are pretty inexpensive if you search on ebay and are very easy to mount

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Offline gan02340765Topic starter

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Re: DC Motor
« Reply #8 on: January 30, 2008, 03:02:11 AM »
first, the motor requirement voltage shall not more than 12v , coz i use mircocontroller to preform the DC motor...
second,the motor shall be high torque and the speed shall be faster than power window..
third, if u all been join competition before, the motor mz be easy to mount.
can i have a sample picture of wheel chair motor? i didnt see it before ...
thanks

Offline ed1380

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Re: DC Motor
« Reply #9 on: January 30, 2008, 03:06:20 PM »
it doesnt matter if the motor is over 12v. you'd just need a 24v h-dridge or higher if necessary

you cant have torque and speed.
torque, speed, price-. you can only pick 2
or
torque, speed, 12v- pick 2

you can make  motor mount easily. just get some flexible metal and clamp it around the motor

wheelchair motor pic- use google
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Offline gan02340765Topic starter

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Re: DC Motor
« Reply #10 on: January 31, 2008, 12:29:11 AM »
i think i need the torque most, coz the robot 10Kg ...cheap DC motor cannot support it ...that why i need advise from u all, maybe some of you use this kind of motor before..
what flexible metal do u introduce me to use to clamp the shaft??

Offline ed1380

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Re: DC Motor
« Reply #11 on: January 31, 2008, 12:35:43 AM »
strip of sheet metal.

windshield wiper motor might do for a 10kg robot. others will know more than me about that
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Offline gan02340765Topic starter

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Re: DC Motor
« Reply #12 on: January 31, 2008, 10:30:03 AM »
can u tell me is what kind of metal ? Al ? Cu ?
hmm ..thank for ur advice...i try and use that motor ..

Offline ed1380

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Re: DC Motor
« Reply #13 on: January 31, 2008, 03:14:16 PM »
aluminum probably no, but any kind of piece of flexible metal about 1/16" thick

heres an interesing link http://www.loganbot.com/bot_tips.html#drive
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Offline gan02340765Topic starter

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Re: DC Motor
« Reply #14 on: January 31, 2008, 07:47:41 PM »
thank guy..i didnt try to use any metal to clamp the shaft and the the wheel...before that, i jz drill a hole between it and lock it...

Offline ed1380

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Re: DC Motor
« Reply #15 on: January 31, 2008, 08:12:46 PM »
huh? the sheet metal is to mount the motor to the base/frame
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Offline gan02340765Topic starter

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Re: DC Motor
« Reply #16 on: February 01, 2008, 05:53:27 AM »
i cant get ur point lah... any picture to show me ?

Offline ed1380

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Re: DC Motor
« Reply #17 on: February 02, 2008, 01:05:01 AM »
i cant find one. even though i saw it not too long ago.
hope this helps.
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Offline SmAsH

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Re: DC Motor
« Reply #18 on: February 02, 2008, 01:22:05 AM »
is that a brace?
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Offline ed1380

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Re: DC Motor
« Reply #19 on: February 02, 2008, 02:09:38 AM »
picture is side view. green part is the sheet metal i've been discussing. it's supposed to be tight around the motor
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Offline SmAsH

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Re: DC Motor
« Reply #20 on: February 02, 2008, 03:13:55 AM »
ohh ok well if it were me i would put a smidch of super glue just for extra hold.
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Offline gan02340765Topic starter

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Re: DC Motor
« Reply #21 on: February 02, 2008, 07:58:34 AM »
it quite a good idea also... i would like to try it if i have chance...
anyway , thanks ...

Offline ed1380

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Re: DC Motor
« Reply #22 on: February 02, 2008, 09:35:07 AM »
haha was looking through the forum and theer was a thread about a robot.
guess what kind of motor mounts it had  ;D


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Offline Admin

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Re: DC Motor
« Reply #23 on: February 03, 2008, 05:16:52 PM »
Quote
any DC motor suggestion that have stall torque 10Kg above

Quote
coz the robot 10Kg

what really shocks me is that not one person has noticed that 10kg is a weight - not a torque!

This is a FAQ question:
http://www.societyofrobots.com/robot_faq.shtml#select_motor

All of you really need to read these two tutorials:
http://www.societyofrobots.com/mechanics_statics.shtml
http://www.societyofrobots.com/mechanics_dynamics.shtml

And then use this calculator to determine what motor is good enough for your robot
http://www.societyofrobots.com/RMF_calculator.shtml

Lastly, gan02340765, its a bit difficult to read what you write. Pls dun randomly abbr ur q's. ;)

 


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