Drill motors

[woody]

Drill motors

Pick a drill with an rpm around the 900-1100 mark.
You can then simply remove the chuck ...attach 100mm wheels in their place and get a speed of around 10 mph.

[cuddles]

Drill motors

I want to arm my bot with an electric lifter - but still want it to have enough power and grunt to push around. I will be using 100mm blue wheels.

Thanks for the tip Woody.

[beast]

Drill motors

shop down town selling girly 12v drills for £5

[psycho_fling]

Drill motors

suitbale for beauty then

[simon]

Drill motors

Which shop ?

[beast]

Drill motors

it used to be carols but kids told me its big D now

[Gaseraki]

Drill motors

With wool worths closing down I got a few bargans.
One was an 18 volt drill for 15 quid. Not for a robot.

[banana_man]

Drill motors

does anyone know how fast 12v el cheapo B&Q drill motors overvolted to 14.4v would go with 19cm diameter wheels?

(Message edited by banana_man on December 03, 200

[typhoon_driver]

Drill motors

very quick, drop the diameter down to around 10cm mark or throw in some extra gearing. I could see you burning out the motors with a wheel that big or drawing huge currents through your controllers.

[Gaseraki]

Drill motors

Depends how flexible your wheels and drill mounts are. I did get away with large wheels but it was very flexible and had a lot of give.

Test drive

http://uk.youtube.com/watch?v=mZIvvE_Cexkhttp://uk.youtube.com/watch?v=mZIvvE_Cexk

When in the arena and the wheels got a layer of dust, it was very difficult to drive.
I would also suggest going to around 10cm.

[banana_man]

Drill motors

I would go for smaller wheels, but Im doing a Maelstrom style featherweight lifter. the wheels need to be that big. Is there a better(but still cheapish) motor and gearbox alternative for this wheel size?

[banana_man]

Drill motors

CAD on profile. All to scale.

[typhoon_driver]

Drill motors

The main problem I can see is that you are going to be overvolting the motors and running them on big wheels. There is a way around it if you are using a decent radio control system such as a dx6 or 7 spectrum. You could always just adjust the travel on the sticks so that the motors never see the full 14V and in fact may only see around 10V. They should be able to handle this far easier and it will make the machine more controllable as such a high speed in the wheels will result in the machine being hard to steer

Its one of those cases where it is borderline and I am never a fan of borderline when it comes to my own machines as I have learned from many a blown up speedo or nackered set of batteries.

The good thing about drills is that they are that cheap that you could experiment and see if it works out.

nice CAD btw

(Message edited by typhoon_driver on December 05, 200

[banana_man]

Drill motors

thanks Gary. I do have a spektrum DX6 and that sounds like a great idea. The only reason I use 14.4 is for simplicity. I had 2 7.2v packs so I thought id use them.
Tanks about the CAD

[Gaseraki]

Drill motors

I do like the look of donnar what you have called you feather
Makes me want to eat a kebab.
I think your going to be putting a lot of strain on those drills if you set them up like that.
Not only are they going to have to shift a large amount of weight from the back, you will virtually have no torque.
You are going to hit some one and stop.
I was able to get away with my setup because
1. The wheels were in the middle of the robot
2. The robot weighed about 6.5 kg

It might work but I recorn you will break drill motors like no tomorrow.
I suggest maybe stepper pulley from the drills to the wheels? Also try putting as much weight away from the front end.

Hope that helps