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Author Topic: Abt DC motor  (Read 1007 times)

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Offline macbookTopic starter

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Abt DC motor
« on: August 16, 2009, 03:19:07 AM »
I am working on a ladder climbing bot.
While the motor is off, I want it to remain stationary. Is it possible in DC motor? I want its axle to stay at its position when no current passes thru it. Which motor will serve this purpose best? DC motor (Geared or non-geared) or Stepper?

Offline SmAsH

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Re: Abt DC motor
« Reply #1 on: August 16, 2009, 03:24:23 AM »
with a dc motor you can brake it, just short power across the two terminals.
for ease of control i would go with a geared dc motor, but it all depends on your needs.
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Offline benji

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Re: Abt DC motor
« Reply #2 on: August 16, 2009, 05:43:42 AM »
Quote
While the motor is off, I want it to remain stationary. Is it possible in DC motor? I want its axle to stay at its position when no current passes thru it
Unfortunatly DC motors will drag big current when the load gets bigger and they start to heat, plus their velocity will decrease.

Quote
Which motor will serve this purpose best? DC motor (Geared or non-geared) or Stepper?
In order to not drag any current at all and save power while there is a backward force affecting the shaft the trick will be in the gearhead.
get a DC motor with a one-way gearhead, this will allow roation in the forward direction while suppressing any backward force.


good ol' BeNNy

Offline wil.hamilton

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Re: Abt DC motor
« Reply #3 on: August 16, 2009, 04:57:08 PM »
you could always use mechanical braking ;)
use the google.  it's your friend.

Offline Soeren

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Re: Abt DC motor
« Reply #4 on: August 19, 2009, 05:33:15 AM »
Hi,

While the motor is off, I want it to remain stationary. Is it possible in DC motor? I want its axle to stay at its position when no current passes thru it. Which motor will serve this purpose best? DC motor (Geared or non-geared) or Stepper?
Any kind of motor will do, as long as you use a worm gear.
Regards,
Søren

A rather fast and fairly heavy robot with quite large wheels needs what? A lot of power?
Please remember...
Engineering is based on numbers - not adjectives

 


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