High power drive motors

[mattsdragons]

Trying to did some good motors for my new rebuild

I know about the speed 900 etc but would prefer something drill motor style

Looking into dewalt motors, but others that are similar but good power?

Got to try and balance cost aswell so would speed 900's and gears etc come out less than dewalts?

[craig_anto]

Re: High power drive motors

yes

[mattsdragons]

Re: High power drive motors

Nice and too the point

[maddox10]

Re: High power drive motors

Speed 900 , currently on the Graupner website ‚53 each. Depending on wheelsize, but lets take a 6-1 gearratio on a 100mm wheel.

Z12 mod 1 is the smallest I would put on the 6mm axle of the 900. £4.69 each.
Z72 mod 1 is a heavy and more expensive gear £22.78 each (and 540 grams)

Don't be fooled, a Speed 900 on 12V will shred plastic gears like chewing gum.

Speed will be around 20 km/h. (pricetag for motors and gears total £143, without P&P or anything)
Also, a strong drive needs a good speedo.
An Mk 1 XXL doesn't cut the cheese when the you go over 16V.

You could use a 2 stage gearbox, using a smaller first stage and then belt drive to get 4 wd.
Adding a timing belt second stage. Adds at least £80 to the setup.

************************************************** ***************************
A Dewalt drivetrain from Robotmarketplace $185,99 each.

In other words, a seriously powerfull drivetrain for a feather will cost a bundle.

[mattsdragons]

Re: High power drive motors

Found speed 900's for £36.50 which ain't too bad

It's just trying to find a set of gear (which shouldn't be too hard) then belts for 4wd

[maddox10]

Re: High power drive motors

Technobots has the gears , timing pulleys and belts. (got the prices from the site)

And if I calculate. ‚53 = £43.74. So yes, £36.5 is better.
(Unless those are rebatched copies, cheaper by the dozen on Ebay)

[typhoon_driver]

Re: High power drive motors

You are missing the other major point from marios post

Also, a strong drive needs a good speedo.
An Mk 1 XXL doesn't cut the cheese when the you go over 16V.

You need to be sizing up something serious to control it. Possibly even up to a sidewinder which I believe dave is using in 540

[mattsdragons]

Re: High power drive motors

If I could find a sidewinder I would

will need to cost things all up as its basically a new robot, looks like it will get expensive

Although, mk1 xxL could do 20a, and you say that they cut out with speed 900's at 16v

Thinking about what parts I have around, 30a electronize at 14.4v could do the job? Not sure, just putting it forward

[maddox10]

Re: High power drive motors

Yes Matt, I do say that a Speed 900 based drive with a low gearratio will draw so much current the XXL's will cut out. That's the job of a current limiter, ain't it?
BonX and Kashei both use a sidewinder for a simular drivetrain. BonX currently uses a 2 stage , Kashei a reinforced MSR 12-72, and both are 6S or equivalent in battery.

The 30A electronises will do the job. But I think you can smoke'm.

Finding a Sidewinder. Doubtfull, people who use them won't seperate from those easely.

And with a pricetag of $499 new at Robotpower, it's a rather expensive , but small and light speedo.

Unfortunatly, it seems the Scorpion XXL v2 can't do mirror mode like the 1 did, making it a 1 channel speedo with 2 times the amp capacity.

What brings another option for a high power drivetrain.

Using more, but cheaper/weaker motors to do the job. The 4 Batterydrill/GR01 machines are around

And it is concievable to do a 6 or even 8 wheel monster with each wheel seperatly driven. But for that, there is a special problem. Making sure all the wheels can reach the ground on an uneven floor.

[mattsdragons]

Re: High power drive motors

That may well be something ill have to consider

going for 6WD on 6 motors would give great pushing power, but how many esc's could you get away with?

2 higher power for 4 of the 6 wheels on a potential 6wd and 2 slightly lower for 2, all these being electronize

[Danjr1]

Re: High power drive motors

I'm running speed 900 copies (may get changed out for real 10 pole versions) on 30a electronizes which may get changed out for the TorqueMaster BR-XL escs. Seems to work well on 7.5 to 1 ratio on 120mm wheels

[Anttazz]

Re: High power drive motors

I would be interested to see how the Wotty 100 performs with such high powered motors. Definitely more chance of keeping it alive than Electronizes anyway and Ian can always steer you in the right direction if you need it. It could be the answer to the Sidewinder issue on both price and availability. That and the fact that they can be repaired in the UK without import/export duty.

[maddox10]

Re: High power drive motors

Robotpower has a certified repair guy in the Netherlands. Ilyama.

Repair of Sidewinders or XXL's ain't an import/export duty issue. But the buying of a new Sidewinder is.

How small is the Wotty 100?

[craig_colliass]

Re: High power drive motors

I have a couple of Wotty 100 speed controllers, and I like them I used one in Pilgrim for a while and the other is in Tron. I believe that is one reason this robot pushes so well. The Speedo takes the 4 drill motors by the scruff of the neck and kicks them into battle! I have had the speedo fail at least once but Ian dose such a good service in repair it is never much of an issue.
I think the cost was just under £200 one well worth the investment for me.

[Danjr1]

Re: High power drive motors

http://www.fightingrobots.co.uk/index.p ... f=3&t=2931

Specs