i need help

Something to tickle your fancy.

Moderators: petec, administrator, BeligerAnt

windscreen wiper motors or electric scooter motors

winscreen wiper motors
4
50%
electric scooter motors
4
50%
 
Total votes: 8

tom of technology
Posts: 122
Joined: Mon Mar 13, 2006 7:07 pm

i need help

Postby tom of technology » Thu Sep 27, 2007 5:30 pm

I havent been on the forum for a long time (busy with school). But i am thinking of building a super ant but ive never attempted one before and need to knopw a few things,

first of all im not completely shure of the wight limit as there is a lot of contridicting info on the web :-?

motors: i am thinking of using windscreen wiper motors and a sevo to activate a pneumatic valve for the flipper.

speed control: i am on a scarily small budget so i walked down to sussex model centre and bought 2 6 amp 9.6Vsped controllers(?7.99 gws), ihope to power two 12V relays(ive loosend the solinoid springs and they will triger on 9.6V) with them wihich in turn will switch the windscreen wiper motors. in theory it should work but i feel im over looking some much better alternatives.

last of all is the pneamtic weapon. I am thinking of using 2 small(ish) rams on a "Y" connector and servo operated valve, and a "made for the job" airtank.

all of this plus chassis and other bits and bobs i can just about afford but money saving sugestions are very welcome... any suggestions are welcome.


best regs tom

josh
Posts: 1115
Joined: Thu Apr 28, 2005 6:56 pm
Location: Uxbridge, London
Contact:

Postby josh » Thu Sep 27, 2007 5:53 pm

to my knowledge i do not beleive that the super ants are still run at any event although i am not entirely sure
RPD International
www.RPDintl.com

User avatar
Flippt
Posts: 607
Joined: Sun Nov 16, 2003 12:00 am
Location: Sweden
Contact:

Postby Flippt » Thu Sep 27, 2007 7:08 pm

My guesses is that Tom just posted in the wrong thread. I dont know any Superantweight that uses Scooter motor, and still be under 240 gram :lol:
Image
Swedish style!
Fight Robots, Not Humans!

User avatar
bobblebot
Posts: 267
Joined: Wed Jan 07, 2004 12:00 am
Location: Southampton, UK
Contact:

Postby bobblebot » Thu Sep 27, 2007 7:27 pm

I think he meant to post in the Featherweight Section ;)

User avatar
leo-rcc
Posts: 469
Joined: Thu Aug 03, 2006 8:44 am
Location: Hoogvliet, The Netherlands
Contact:

Postby leo-rcc » Fri Sep 28, 2007 8:19 am

Placing a speed controller behind a relay is not a smart thing to do, you will end up with welded relays. A speed controller switches on and off hundreds of times per second, the relays cant keep up and will arc shut.

Speed controllers like the electronizes only use relays to switch between forward and reverse, not to do the actual speed control.
Best regards,

Leo van Miert.
Dutchrobotgames
Team RCC website

tom of technology
Posts: 122
Joined: Mon Mar 13, 2006 7:07 pm

sorry everybody

Postby tom of technology » Sat Sep 29, 2007 7:30 pm

i have now realised my HUGE error i posted this in the wrong part of the forum, but i hope this is still vallid.

leo
i looked acrfully and there was considerable arcing on the relay contacts and at 1 poitn the motor was stuck on but i have fixed the probleem with a small electrolytic capacitor (and a pretection diode) acros the relay coil contacts.

on another note i am still undecided whether to use windscree wiper motors or scooter motors


Return to “Featherweights”

Who is online

Users browsing this forum: No registered users and 1 guest