Running 24V 150W Gold Motors on 12V

[grant_ploughbot]

Running 24V 150W Gold Motors on 12V

drills are very easy to modify to get into a robot, but if your not too keen on using them, then pulleys will work great. i use pulleys on ploughbot to get the drive from the gold motors at the back to the front. pulleys and belts could end up costing more than an extra drill or two though(mine do but i havnt researched the average prices for pulleys and belts)

Good look with your robot, and if all else fails, go with Eds ida of 2 diagonaly powered wheels(blue/LH2 ran like that amd performed suprisingly well)

[Guest]

Running 24V 150W Gold Motors on 12V

ok ive been doin a little research and i think drill motors would be the best idea for me as they include gearboxes and ill get chargers/batteries for them. So can someone show me where i can get good priced drills ?

Also im having a little trouble working out exactly how robots are controlled, usually i would just buy all the bits and have a fiddle but im really want to know what im doing before i buy stuff as i dont have a huge budget and i dont want to break anything so could someone please give me a for dummies explanation of how my receiver interacts with my speed controller, how my speed controller then interacts with my motor and where along the line and how do i acheive tank style steering, oh and why do i get servos with my transmitter and receiver, what do i do with them.

Please forgive my ignorance - im sure you guys had to ask aswell sometime !

[stu]

Running 24V 150W Gold Motors on 12V

Yo Andrew - Try Maplin.co.uk or your local Homebase or B&Q for cheap drills.

As for how to control motors and so on using your transmitter, radio kit, speed controllers - have a look here - http://www.stupoo2000.pwp.blueyonder.co.uk/teamkat/technical.htmhttp://www.stupoo2000.pwp.blueyonder.../technical.htm

Mr Stu

[Guest]

Running 24V 150W Gold Motors on 12V

wow fast reply ! Im checkin out that site right now

[Guest]

Running 24V 150W Gold Motors on 12V

ok, drills either

12V http://www.maplin.co.uk/Module.aspx?ModuleNo=37950&TabID=1&source=15&World ID=&doy=8m3http://www.maplin.co.uk/Module.aspx?...15&WorldID=&do y=8m3

24V http://www.maplin.co.uk/Module.aspx?ModuleNo=44605&TabID=1&source=14&doy=8 m3http://www.maplin.co.uk/Module.aspx?...rce=14&doy=8m3

I guess, 24V is better, as its easier to work with the lower currents etc ?

But i just want some advice incase i manage to buy the only drill that its impossibe to remove the motor from or something

How can i find out the wattage of the motors without buying them and testing them?

[typhoon_driver]

Running 24V 150W Gold Motors on 12V

If you really wanna get into the nitty gritty of how the receiver interacts with the speed controllers etc try here

http://homepages.which.net/~paul.hills/http://homepages.which.net/~paul.hills/

[RogueTwoRobots]

Running 24V 150W Gold Motors on 12V

Andrew, Im not sure what the 24 volt drill is like, but I bought two of the 12 volt drills a wee while back - that gave me my two motors, four batteries and two chargers for just under £30 (plus I ordered a power LED to take it over £30 and get free postage) not to mention two (in a manner of speaking) speed controllers - the drill triggers. So far Ive only had them running in a test chassis and havent actually used them in battle yet, but they seem to be fairly reasonable for the cost, more than adequate for a robot.

Another bit of advice regarding how to dismantle them, just make sure that when you unscrew the drill chuck that you turn the screw clockwise (as opposed to the normal way of anti-clockwise) to remove it otherwise you may chew up the screw head and might have to hacksaw them off - I learnt that bit the hard way :sad:

All thats left after that really, is to remove the drill motor from its casing and decide what to do with the torque ring (the black collar) whether you want to leave it on as it comes (probably a good idea) or take it off and modify it to a fixed torque holder (an area Im not that skilled at doing - best for someone else to explain it probably)

Regards
Jamie

[psychostorm]

Running 24V 150W Gold Motors on 12V

Unlike most people I have actually tried to modify 24V drills. http://www.maplin.co.uk/Module.aspx?...dID=9&doy=8m3>

[big_nipper]

Running 24V 150W Gold Motors on 12V

Hi Andrew, If your not sure which drills to use keep in mind that most people who use drill motors and gearboxes use the 18V ones, the 12V or 18V from Maplin seem to be fine, but be careful of drills with Hammer Action as they are more complex and harder to adapt for robot use, same goes for 2 speed drills, as you will never use the low speed and its just wasted weight. The 550rpm ones need bigger wheels (6) for reasonable speed but some are 700rpm and smaller wheels can be used.

[Guest]

Running 24V 150W Gold Motors on 12V

ok well i think ill get the 12V drills as i will be able to buy 4 of them http://www.maplin.co.uk/Module.aspx?ModuleNo=37950&TabID=1&source=15&World ID=&doy=8m3http://www.maplin.co.uk/Module.aspx?...15&WorldID=&do y=8m3

Ive just thought though, for speed controllers, will i need 4 electronize controllers for 4 motors ! Is there not a cheaper way ?

Also for batteries, should i connect all the batteries in parallel and they will just last much longer ?

[ewan]

Running 24V 150W Gold Motors on 12V

You can use two electronizes, just connect the motors in parallel

[stu]

Running 24V 150W Gold Motors on 12V

As ewan said just connect the motors in parallel in pairs. One pair (side) per speedo. So you only need 2 electronizes. As for the batteries - im sure if you connect one 12v pack to one electronize and another 12v pack to another electronize you will be fine for a battle. I know Jonno made a robot called Foxy Boxy with 4 12v Drills, 2 Electronizes, and only 2 battery packs (one per side) and it ran for ages. Thats your best bet.

Mr Stu

[Guest]

Running 24V 150W Gold Motors on 12V

ah, i didnt think of that, lol. k cool thats my problem sorted then

Im havin doubts about the power of the 12V drills, is there anybody that can give me an example of what power 4 of them will have or anyone know the approximate wattage of them ?

EDIT, one thing i forgotten to mention, anyone know the gearing ratio on the drills ?

[stu]

Running 24V 150W Gold Motors on 12V

Hiya Andrew,

Dont worry about the wattage - thats going into too much detail which is pointless to be honest - 4 Drill motors will push a feather weight with Astro Flights for drive (FACT!). I remember someone telling me the gear ratio is about 16:1 - if its true or not i dont know, but the output shaft spins at aprox 1000rpm.

Andrew - best way to get into this and have fun is to build the thing with 4 Drill motors - you WILL have more than enough push/wattage/power to push a feather weight. How grippy your wheels are or what your scoop design is like is another factor to how good you will push. At a later date you can modify your battery packs of buy some decent ones from a model shop or online from technobots.co.uk or overlander.co.uk and up the voltage to speed your robot up. But you u need to start somewhere. - Good luck as you seem very technicaly minded and trying to think of the design from every angle.

Mr Stu

[Guest]

Running 24V 150W Gold Motors on 12V

lol, Thanks mr stu. Im almost done with my endless questions i promise !

think this will be the last batch.
OK the speed controllers, 15A enough ? Whats involved in the DIY electronize kits, will i simply plug a few things together or will i need to get the soldering iron out ?

ok one thing i havnt thought about properly yet is connecting the wheels to the output of my motor, how do i do it ? Any fiddling need due to it coming from a drill ?