Motor Trouble

[grant_ploughbot]

i think your best bet is probably standard drill motors, good in both directions, lightweight and just as cheap! and hey, you even get batteries with the drills

[razerdave]

So where do I get them ? I aint buying the whole drill :P

[typhoon_driver]

why not?

You can get drills for a tenner and they come with the motor, gearbox, battery and charger!

[ewan]

I made my gear mount myself

The wiper motors Paul sells go the same speed both ways I think, so no problem there. The only problem I have encounted is that the length of thread on the output shaft is not enough for a strong mount so I will probably make a custom shaft to mount onto the threaded section.

Drill motors are easy to modify and Im afraid youll probably have to buy whole drills as there aint many places which sell drill gearboxes and motors. Try places like Index, Woolworths (Big W) etc... Drills do work really well and Ive brought at least 18 by now :wink:

Regards, Ewan

[razerdave]

Ok, I suppose I had better get some drills, but for 2x 10 quid drills, thats gonna put me about 30 quid over my 50 quid budget (one the college set me, its what they are willing to pay), but hey, if it works, who am I to complain ?

[dmac]

Could always try finding some at a car boot sale, or jumble sale

The Technobots WW motors are great value for money, But as with all wiper motors they do go slightly faster forwards then backwords, (I remeber working out the speed differances as I tryed out a pair for Paul ages ago, Not sure were I put the numbers though!) even with the correct brush selection. Only problem with the Technobots motors is the magnets carnt be rotated via 45degrees to rectify this problem, But I put 2 of those motors in bodger and when it worked it always drove around fine

[james...venom]

is £50 your overall budget? id look into getting some sponsers. approch places like focus do it all and let them know its a school project. im sure they would be willing to help

[typhoon_driver]

well if you dont want to buy a drill theres these http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=1200&item=59386251 13&rd=1&ssPageName=WDVWhttp://cgi.ebay.co.uk/ws/eBayISAPI.d...=5938625113&rd =1&ssPageName=WDVW

http://cgi.ebay.co.uk/ws/eBayISAPI.d...939116523&rd=1

[mattan]

gear ratio 810:1 ? what are u building ?
buy 2 fan motors from a old car ,in the front, behind the cooler. then buy sprocks and do a ratio of 5:1 or 10:1,,, vrooom, the rpm on this motors is around 3000 rpm and 1-2 Nm max