Tormenta 2 - Build Diary

[Liftoff]

Re: Tormenta 2 - Build Diary

Depends on what ratio your're running, the 1:36 needs two copper washers, the 1:24 needs one copper and one nylon.... Just assembled mine
For your drill gearbox I think you'll have to do it by trial and error tho

Ewan placed all the info on his webshop

[razerdave]

Re: Tormenta 2 - Build Diary

Hold up, the GR2ms need washers for what?

[Liftoff]

Re: Tormenta 2 - Build Diary

Because the 1:24 1st stage gears are shallower than their 1:36 counterparts.
6mm (1:36) vs 5.3mm (1.24)

If you keep the 1:24 washers you'll bind the gearbox!

Look here:
http://www.gimsonrobotics.co.uk/spare-p ... _GR02.html

[Ellis]

Re: Tormenta 2 - Build Diary

Of course, you don't need/can't place spacers in drill gearboxes. The groove cut for the circlip dictates the position of the shaft in and out, so it's fine. The gears tower up to the same height as the factory gears anyway, so we shouldn't have to do anything more advanced than replacing the gears and motor.

With that said I have made one up and have run it in for 5-10mins in both directions on 12 volts to run it in. The motor is as smooth as smooth, and the gearbox sounds smooth, but it seems to get warm after a while. I don't think I ever felt to see if gearboxes get warm at 36:1, but this is quite a lot of heat, enough to worry me a bit. The gearbox has completely fresh insides so there are no bits of grit or anything. It does this bizarre buzzing sound for a moment or two every 5-6 seconds, too. No idea what it is. It's regular enough to be able to predict when it happens.

Bit confused. I can't put them together any other way so I'm gonna run with it. They'll never be running in this fashion in combat and I'll check the others, but it pulls less than 2 amps at 12v, so I don't think the gearbox is holding it back.

Will keep this updated.

[ChrisKazoo]

Re: Tormenta 2 - Build Diary

Tormenta 2's looking sweet Ellis

[Ellis]

Re: Tormenta 2 - Build Diary

Thanks!

Well after a day's worth of sore fingers and grease going in all directions, the new motors and gearboxes are in. There were some complications in mounting them, so it took much longer than I expected, but it's all looking pretty healthy. I'll stick the some pictures up of the

make-a-massive-mess-on-the-dining-table-fest-2013

tomorrow, which was as satisfyingly massive as I had predicted.

I couldn't drive it at any speed this evening due to noise (by this evening I mean 12am...) but creeping around it feels a world better than it did before. It's a lot smoother and the low-end finesse has doubled. From what I can feel it has lost *some* mad explosiveness but, in the single full burst I did, it still had enough power to wheelspin, which is awesome. I'll be able to drive it with a bit more confidence tomorrow, and hopefully I'll confirm my current opinion, which is that the parts were money very well spent.

Bed time I think.

[mattsdragons]

Re: Tormenta 2 - Build Diary

Whats uour current set up ellis? From the looks of things there is tons of power in there

[Ellis]

Re: Tormenta 2 - Build Diary

Until last night, 12v drills at either 18v NiMHs or 5s LiPo, 36:1 and 100mm wheels. The same tons of power that allowed us to plow through machines in the hockey game at MMM was the same power that made it so unreliable.

I have yet to test the new setup (18v motors and 24:1 ratios) in anger but I have a feeling it's still got plenty of push.

edit: oh and the pictures of the

make-a-massive-mess-on-the-dining-table-fest-2013

as promised...

[mattsdragons]

Re: Tormenta 2 - Build Diary

Im doing the same changes as you, though my set up never broke, everything got hotter than it should so im.interested to see how you think the mods go

[Ellis]

Re: Tormenta 2 - Build Diary

More driving suggests the mods are well worth it: should be more reliable, same speed, less heat, etc. ^

-----------

We have made our own wheels. They work in exactly the same way as blue wheels, with the reverse thread screw locking against the wheel which locks onto the normal thread to hold the wheel on the shaft. The blue wheels sometimes worked their way loose but they were never an issue, they stayed tight 95% of the time. But despite cranking our own wheels down hard, harder than we ever had to before, they work their way loose. Everything is solid, in that it's metal on metal and it's essentially a replica of the blue wheels, but they still work loose.

The tread is just bike tyre, but it does seem to grip our dusty floor better than the blue wheels. The only thing that I can think of is that the added grip means that we're effectively putting more torque through the wheels, and that we've just reached the limit of the standard attachment method for drills? Does that tie in with other people's experiences? If we try tightening more we'll be entering thread stripping territory.

Any ideas? Any old hands got solutions to wheels loosening like this? Going to look into alternate attachment methods. Suddenly, though, we leave in 5 days. Eek!

Thanks.

[maddox10]

Re: Tormenta 2 - Build Diary

We had the same issue with Hannibalito 4.

But that's permanently fixed with 2K glue. Removing a wheel asks for a hot air gun tough.

[Liftoff]

Re: Tormenta 2 - Build Diary

Ellis why don't you fix the wheel to the shaft in a way similar to the way a drill chuck is fixed to the shaft. I never had a wheel coming off this way. I'm using a metal hub threaded with the same thread as the shaft, the hub will cover the whole length of the thread on the shaft. Then the locking screw will lock everything in place. Its impossible to work loose this way as long as you dont strip the threads or shear off the lock screw

[Eventorizon]

Re: Tormenta 2 - Build Diary

You could try Locite on both the main shaft and the counter-thread in the centre. Though I am still surprised that you are working loose an anti-clockwise bolt!

[typhoon_driver]

Re: Tormenta 2 - Build Diary

This is why I have opted for the banebots hex hubs with key ways this year. I lost that fight with beauty two years back because a wheel came loose. Shouldn't be an issue now

[Ellis]

Re: Tormenta 2 - Build Diary

Ellis why don't you fix the wheel to the shaft in a way similar to the way a drill chuck is fixed to the shaft. I never had a wheel coming off this way. I'm using a metal hub threaded with the same thread as the shaft, the hub will cover the whole length of the thread on the shaft. Then the locking screw will lock everything in place. Its impossible to work loose this way as long as you dont strip the threads or shear off the lock screw

That is precisely our setup and it works loose within about 20 seconds of driving hard...

It does feel like it shouldn't be possible but it certainly is, because it keeps happening!

We're going to try locking agents like loctite, see if they help.

And we're looking into alternatives, Gary, such as banebots hubs or in fact making our own. Hoping loctite of some sort does it, though, purely for simplicity.