Society of Robots - Robot Forum

Mechanics and Construction => Mechanics and Construction => Topic started by: daniel.apds on January 28, 2010, 05:23:03 AM

Title: Help needed in building a wired bot....urgent
Post by: daniel.apds on January 28, 2010, 05:23:03 AM

hi,
 
   i wanted to build a wired bot.....4 wheel drive....and i used two switches for controlling.....the forward /backward switch is working fine ....but when i connected the wires to the second switch (left/right motion) the battery is getting shorted ....

                      i fixed 4 motors to a rectangular chasis...two on each longer side of the box.... these two motors were connected
 in parallel .... i used DPDT switches....
                       
                     Give me some idea on how i can go about connecting the switches and the battery.....thank you.....
       

Title: Re: Help needed in building a wired bot....urgent
Post by: SmAsH on January 28, 2010, 05:37:57 AM

Have you tried doing each side independently? This would probably solve the shorting issue.
Like, have the right side motors in parallel, forward and reverse on one switch and the left on the other?
This could be achieved with just two dpdt switches.

Title: Re: Help needed in building a wired bot....urgent
Post by: daniel.apds on January 28, 2010, 11:19:10 AM

ya ... tats exactly wat i did ... i connected two motors in series on each side ... so i had two wires coming out for two motors...so i totally have four wires ... and fwd/bkwd motions were gr8 with one dpdt switch ... but when i tried left/right in another switch the shorting prob came up ...

Title: Re: Help needed in building a wired bot....urgent
Post by: Comrade117 on January 28, 2010, 12:59:23 PM

I am beginner, but why don´t you use 2 motors, instead of 4 motors?  ;)

Title: Re: Help needed in building a wired bot....urgent
Post by: SmAsH on January 28, 2010, 07:20:40 PM

Quote from: Comrade117 on January 28, 2010, 12:59:23 PM

I am beginner, but why don´t you use 2 motors, instead of 4 motors?  ;)

Would be easier, and i suggest it.
I attached a switch diagram to show you how you should wire it.

Title: Re: Help needed in building a wired bot....urgent
Post by: daniel.apds on January 29, 2010, 03:15:12 AM

 
     i used one switch for each pair of motors....so i got differential drive 8)....though tats not exactly wat i wanted :'( but some thing s better than nothing  ;D
     and guys i wanna know if anyone did any project with pic16f877a and 2-axis accelerometer (MEMSIC 2125)...