motors

which motors are better :
http://www.ebay.co.uk/itm/190660369831? ... 1438.l2649
or http://www.ebay.co.uk/itm/160777373998? ... 1438.l2649
also are any of these batteries good?
http://www.ebay.co.uk/sch/i.html?_nkw=3 ... m270.l1313
sorry i have so many stupid questions.

2nd link doesn't work.

fixed it

I think the scooter motor will be more powerful but that's just a hunch. Both motors would need gearboxes though, with the scooter motor it would be fairly easy to have a reduction using chain and sprockets but for the Mikita motor you would probably need the matching gearbox. If I was you I would go for the Gimson motors or Argos value £12.50 cordless Drill motors for your first bot, they are very simple to use and ou don't need to worry about gearboxes.

For my first bot I tried to use windscreen wiper motors despite everyone advising otherwise and still haven't managed to finish it due to complications and difficulties only caused by the motors. But I have managed to make 3 robots using drill motors and robochallenge wheels, it's just so simple!

The Makita motor is the more powerfull, smaller, lighter but with a much higher RPM.

The scooter motor is large and heavy, but with the lower RPM easier to work .

Concerning batteries. you can't do much wrong with the vapextech one. But you'll need 2 of'm for the scooter motor, the Makita can work on the 8.4V of the first Vapextech pack.

any links for good drill motors?

are u after 12v or higher

http://www.argos.co.uk/static/Product/p ... 418778.htm

ive used argos ones in my 4x4 robot and they are defiantly cheap and cheerful but for my second robot i found these http://www.ebay.co.uk/itm/BRAND-NEW-GEN ... 35b8213ae2

they work out about the same but you don't get any battery but most people don't use the drill packs and they are better build quality and a bit faster

the seller also has some more expensive and more powerful bare units

thats really helpful but will they power my robot

Do you mean are they powerful enough? If so then a lot of robots use those drill motors and they are quite fast and powerful, you won't be the most powerful pusher but for your first robot there great! If you want more power then you can go for gimsons which will be more powerful.

i think i will get gimsons if they r in my price range but my robot is a thwackbot and needs alot of power

Plain grimsons are £24.50 but you can choose conectors and wires for them as well for an extra £1.70
grimson website: http://www.gimsonrobotics.co.uk/GR01...gearmotor.html

the scootoer motors are more powerful and will probably give me more impact when i attack enemies but i dont know what would be suitable for this esc:
http://www.technobotsonline.com/saberto ... or-rc.html
the only reason i suggested the scooter motor is because they are cheap and i thought they were good but if push comes to shove i will buy the gimson motors.

A quick question, which of your robots were most successful? what kind of robot are they? did you have any tactics?

scooter motors will end up costing more than the gimsons once you buy gears.
also, i don't like the sabertooth escs, they are a little fragile, try some electronizes much more rugged.

oh, i have a lifty pushy boring robot, runs 4wd off of 4 GR01 motors and it can lift around 50 kg

the robot sounds good and i may buy the gimsons but i thought i might need 18 - 24v motors to give it enough strength.

overvolting. overvolting. overvolting

running 12v drills on 18v gives you plenty power and speed for a simple bot.

oh ok i thought you had to match the voltage with the max of the esc and battery etc.

don't over volt an esc though

http://www.ebay.co.uk/sch/i.html?_kw=ge ... erTools_SM any of these do? this is my first project and i want to get it right.

not really.

gimsons, drills or speed 900's if you have moneyz

i have a drill motor but they are ridiculously small and they look too weak and stupid on my featherweight thwack bot. this is the one i got.
http://www.ebay.co.uk/itm/12V-Small-PCB ... 27c4ad1d3d

not those type of drills,
the cordless drills, ones with a gearbox.

Like so: http://www.argos.co.uk/static/Product/p ... +DRILL.htm

You can overvolt them to 18V, or use larger wheels to get more speed. Finding the balance between voltage and wheel size will be key to the performance of a thwackbot, as the larger the wheel, the less torque (turning force) the motor has.

I wouldn't say there is too much difference between the GR01s and cordless drills when it comes to power for a thwackbot. If you really want a fast and meaty drive, Speed 900s (or their cheap eBay replicas) are the sort of motors you want to be considering. The issue with them is that you have to sort out and pay for parts for a gearing system (sprockets & chain, timing belts & pulleys, gears etc)

i am trying to find two for under 40 quid

Well those drills will be your best bet. Alternatively, these Speed 900 clones are £12 each:

http://www.ebay.co.uk/itm/300511267976? ... 725wt_1037

Which leaves you with £16 for gearing. Not entirely impossible I don't think.

i am getting those where will i get the gears? sorry for all my pointless rookie questions.

technobots have a good selection

any in particular that would fit because i wouldn't have a clue?

Pulleys and belts: http://www.technobotsonline.com/index.p ... ory_id=197

Click on 'aluminium timing pulleys' for pulleys, 'timing belts' for belts, and then just match the types up (T5x10mm, T10x16mm etc)
Drumroll uses T5x25mm for its weapon. T5x10mm would probably be fine for a drive system.

Sprockets and chain: http://www.technobotsonline.com/index.p ... ory_id=193

Either the 6mm or 8mm sprockets/chains should be beefy enough for a featherweight. As an example, DB5 (4-wheel drive pusher) uses the 6mm stuff.

gears: http://www.technobotsonline.com/gears/m ... gears.html

Mod 1 will be fine. though i really don't recommend you attempt your own gearning on your first featherweight.

thankyou so much i have got the gears and motor sorted out. I am going to turn this topic into a thread because innevetably i will have more newcomer questions. I sincerely thankyou all for your help on my major motor prediciment. :D :D :D :D

i need a 5mm hole

Depends how accurate and in what material on what location.

If it is on your gears/ pulleys then technobots will drill out the centres for you as long as the bore size isn't larger than the size you want to start off with

You really haven't listened to the good advice on this thread as far as I can tell (although there is a fair bit of crap in there too).

For a first bot, DO NOT TRY AND MAKE A GEARBOX YOURSELF. You will will have a hard enough time trying to get the other systems working and put together into a chassis. Buy a couple of drills or the gimpsons and use those as a nice drop in solution. Run them at their rated voltage and use an appropriate speed controller. I'm always a fan of the electronize as they are nice and simple, very rugged.

Once you have built your first machine and attended an event and spoken to people, you will have a far better idea about voltages, gearboxes etc etc. Trying to machine a mod 1 gearbox without a mill is a pain in the arse at the best of times. Not impossible, just a pain.

I only can agree with Gary.

I made assembled quite a few gearboxes myself. Batterydrill based, speed 600-700 and 900 based, and for heavyweights Iskra and Bosch based ones.

On the other hand, I have acces to a reasonably complete metal working workshop at home, and the support of very fine engineers with even a more impressive array of tools.

Even then, I opted for Gimsons in the newest Hannibalito to speed up construction and ease of replacement

The 4th of the line. 1 and 2 (Wedgie) are sold.

And Hannibalito 3 is in continous use sinds it's first outing, proving very reliable and with a fair turnaround time. (from arena removal to -barring battle damage CO2 filled and recharged in 15 minutes)

i am going to use the gimsons ( even thought they are too expensive for my liking) i will use 12v as that is what they are. i am using a sabertooth ,even though you are all saying not to, as they are cheapest i can find and i dont have to pay postage, i will collect them. My robot will look stupid from the side with a wide diameter chasis but really small motors but i guess if i used anything else i would muck it up.

the gimsons motors com in either 9.6v or 14.4v last time i looked and which sabertooth as the 12a ones are ok if you don't intend to do lot of pushing cos i had my robot pushing against me and it kept cutting out for a split second ...... so the 25a ones would be better i think

okay