Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: tomnt12 on April 24, 2008, 09:28:39 AM

Title: Are Servos Powerful
Post by: tomnt12 on April 24, 2008, 09:28:39 AM

im an avid doctor who fan and im planning to build a 1/4 size dalek out of MDF anf HDF. i am planning to build a traingular base with RC to mount it on but i need to know whether servos are powerful enough (then which ones) or if i will need to use DC motors.
cheers
Tom

Title: Re: Are Servos Powerful
Post by: Steve Joblin on April 24, 2008, 09:43:28 AM

some servos are pretty powerful, but they can also get expensive... for something of the size and weight you are looking for, I would go with DC motors.

What are you an avid Doctor of?

Title: Re: Are Servos Powerful
Post by: tomnt12 on April 24, 2008, 09:45:08 AM

sorry i meant an avid "Doctor Who" fan the british Sci-Fi Drama

Title: Re: Are Servos Powerful
Post by: benji on April 24, 2008, 11:18:37 AM

cheap ones (10 $) gethya around 4 kg.cm

Title: Re: Are Servos Powerful
Post by: superchiku on April 24, 2008, 11:39:38 AM

4 kgf / cm is quite a good amnt its like 40 N/cm so it will work

Title: Re: Are Servos Powerful
Post by: tomnt12 on April 24, 2008, 12:09:12 PM

im probably loking to spend £20 or servos (2 of them) and one cheap one to turn the front wheel for steering

Title: Re: Are Servos Powerful
Post by: paulstreats on April 24, 2008, 12:38:28 PM

Maybe think abut using some light plastic to construct it with so it isnt too heavy. hdpe is as easy as machining mdf

Title: Re: Are Servos Powerful
Post by: tomnt12 on April 25, 2008, 12:03:14 PM

will do i was thinking of aluminium or hdpe for the base and styrene or hdf for the dalek

Title: Re: Are Servos Powerful
Post by: Admin on April 25, 2008, 01:57:38 PM

http://www.societyofrobots.com/robot_faq.shtml#select_motor

I'd second the suggestion of using DC motors (geared down).