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Wiper motors???
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WiperMotor



Joined: 04 Sep 2006
Posts: 301
Location: SA,Australia


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Wiper motors???

Hello All

I am new to these forums and would like to get some advice from the pro's.
I am building a wheeled robot not just for robowas as it may be used for paint ball tank battles as well.
Here some of the specs

it will hopefully be powered with a falcon wiper motor and 4 SLA alarm batteries but I'm not sure wether it will have enough power to push my robot along and up hill and things. (Dose anyone have any Idea how much grunt these things have?)
Onboard 450Mhz, P3, 256M ram, WIFI video feeds
Wiper motor steering using a kit from OE
Push mower wheels

For my next problem dose anyone know what I can use to make the chassis out of? I found an old rover self propelled frame withe the bearings axel and everything else on it (yay I don't have to build it)

Any suggestion or comments will be greatly appreciated

thanks
Simon

Post Tue Sep 05, 2006 2:27 pm 
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marto
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Joined: 08 Jul 2004
Posts: 5459
Location: Brisbane, QLD


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Yes sounds like you have some ideas. A single wiper motor is probably not big enough to push anything carrying 4 sla batteries. Also most people use tanks steering instead because it easier to setup. Finally I'm not sure how well the WIFI will go and it usually isnt practical for a combat robot.

Do you have any ideas for a weight class?

The best thing to do would probably go have a look at some of the robots in your local area if you can.


Steve
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Post Tue Sep 05, 2006 2:49 pm 
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Totaly_Recycled
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Joined: 15 Jun 2004
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The ford ww motors are around 50-60 watts and geared about 63 to one from memory they do around 37-38 rpm on 12 volts the average mower wheel is around 145 -150mm dia --- so will travel aproximatly 500mm distance per revelution your robot will travel along at about 1.2kilometers per hour with that motor and that sized wheel ---- as for pushing it should easily move 30 kgs up a 25 degree incline at that speed .

Post Tue Sep 05, 2006 2:53 pm 
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WiperMotor



Joined: 04 Sep 2006
Posts: 301
Location: SA,Australia


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Hi and thanks for your reply

I think it will be used mainly for RC paintballing but when there is finaly someone else around here with another robowar bot I will probably take the computer out.

Just wondering what sort of batteries were you thinking of?

EDIT: WOW thanks for the detailed reply Very Happy
ANOTHER EDIT: specs Length = 15.1cm -Height = 9.5cm -Width =6.5cm Weight =2.4kg
link http://cgi.ebay.com.au/12V-7Ah-sealed-lead-acid-SLA-battery-for-alarm-panel_W0QQitemZ260025902327QQihZ016QQcategoryZ111430QQrdZ1QQcmdZViewItem

thanks
Simon

Post Tue Sep 05, 2006 2:55 pm 
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Rotwang
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Joined: 15 Jun 2004
Posts: 1586
Location: Vic


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The limiting factor is the plastic gear braking, wiper motors are normally timed in one direction, which can be a problem to.

They will overvolt tremendously as they are so low stressed stock but this just aggravates the gear braking problem.

Lawnmower moved OK on 2 wipers at 24 and 36 volts but broke gears.

Lawnmower is a 4 WD middleweight weighing a full 50 kg.

Post Tue Sep 05, 2006 3:09 pm 
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WiperMotor



Joined: 04 Sep 2006
Posts: 301
Location: SA,Australia


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Sorry I'm a bit stupod do you think you could explain the last 2 lines a bit more, sorry

And My unit will only be running on 12 volts


Last edited by WiperMotor on Tue Sep 05, 2006 3:17 pm; edited 1 time in total

Post Tue Sep 05, 2006 3:14 pm 
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Totaly_Recycled
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vertex drove with 130 kgs up a very steep hill probaly 35 degrees or more with 4 ww motors and a one to two over drive ratio with trolly wheels i think it did about 6.3klm on 24 volts that was after i made all steel gears for it

Post Tue Sep 05, 2006 3:16 pm 
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Daniel
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Joined: 30 Aug 2005
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Lawnmower is the name of a robot.

4 x 7Ah batteries should last all day if you are only using one motor.

Post Tue Sep 05, 2006 3:17 pm 
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Totaly_Recycled
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Lawn mower is the name of Garrys middle weight robot

Post Tue Sep 05, 2006 3:17 pm 
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WiperMotor



Joined: 04 Sep 2006
Posts: 301
Location: SA,Australia


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ahhh thanks very much guys

Post Tue Sep 05, 2006 3:19 pm 
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Totaly_Recycled
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I would sugest useing a scooter motor and chain set up for your drives

Post Tue Sep 05, 2006 3:26 pm 
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WiperMotor



Joined: 04 Sep 2006
Posts: 301
Location: SA,Australia


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Ahh cool

Where would I be without http://www.oatleyelectronics.com.au/

Could I use a 200W scooter motor? http://202.93.111.217/~oatleye/images/sc300_f.jpg

and I'll use this for the monster servo
http://202.93.111.217/~oatleye/kits/k165b.html

Post Tue Sep 05, 2006 3:38 pm 
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Knightrous
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Joined: 15 Jun 2004
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Location: NSW


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Don't buy those monster servo kits... They are more trouble then they are worth. Been there, blew them up... I believe Jeff F has a pair as well which he fried too....
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Post Tue Sep 05, 2006 3:46 pm 
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Andrew W



Joined: 01 Jun 2005
Posts: 220
Location: Melbourne, Victoria


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quote:
Originally posted by WiperMotor:
Ahh cool

Where would I be without http://www.oatleyelectronics.com.au/



That must of only just come online, www.oatleyelectronics.com has been down since last Thursday. Just found out that the .com.au site was registered 04-Sep-2006 06:09:27 UTC.
I thought they might of closed, anyway good news to find they are still open Very Happy

Andrew W

Post Tue Sep 05, 2006 3:48 pm 
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WiperMotor



Joined: 04 Sep 2006
Posts: 301
Location: SA,Australia


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oh well I'll have to find some other way to steer it.
Is there any oher way to steer it other than skid steer?

Yeah I have been tryng to get on there site for weeks but stupid google has been showing the .com one Rolling Eyes

Post Tue Sep 05, 2006 3:51 pm 
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