Help with disc

[geoff]

Help with disc

Guys,
We are starting to talk about some very silly RPM here, just be careful if you are thinking about using speeds like this, are any bearings being used going to be up to the job?
Also remember that any teeth on said disc need to be seriously well attached as at those speeds the forces trying to tear them off the rim are colossal!
I wouldnt want to be anywhere near one of these discs if it spat off a tooth, I know, I have seen a tooth part company from a disc at a mere 5000 rpm and that was quite scary enough thank you!

[ewan]

Help with disc

I am making the disc + teeth CNCd out of a solid lump of steel (therefore teeth are part of the disc)... Im going to get some CADS done of this today...

[Guest]

Help with disc

Who has been borrowing a few ideas from Vortex?

[ewan]

Help with disc

mmm... not me (my new CNC sponsors are called oldlandcnc) they are going to be making the complete chassis of the next robot (from team Mini-Maul, see http://www.micro-maul.co.ukwww.micro-maul.co.uk, soon to get an update) and believe me, (I just did a tour around their warehouse) they are one BIG company. They will be doing all parts CNCd (YAY Im as good as Ed now ) out of aluminium and titanium...

Im trying to be as professional as possible with the next robot, using the best components I can get for it... It should be good

[fluppet]

Help with disc

That brings up a question Ive been meaning to ask before. Its all very well making the teeth part of the flywheel, but arent they the most likely bit to get damaged? If so, isnt there an issue that if you lose a tooth you need a completely new wheel that way?

Also Id have thought theyd be easier to sharpen if theyre separate, and you can keep several sharp sets handy for switching between matches.

Not that I ever intend to build a spinner (Im too much of a pacifist, and scared), but Id like to know whether Im inventing issues which just arent there.

--
Fluppet

[fwsorg]

Help with disc

This is fantastic news ewan, but remeber theyll make a really badly designed robot to withing +/- 0.001mm if you ask them to, but it doesnt change the fact that its badly designed. What I am saying is, BE SURE you think the design is as good as its possibly going to get before one of their end mills gets within a meter of any metal. To slightly mangle an old proverb: design twice, cut once.

[ewan]

Help with disc

Be sure... Im being careful...

[geoff]

Help with disc

The only problem I can see with a one piece cncd job is at that sort of speed any tooth damage will cause MAJOR balance problems..you may be better with replacable teeth, but see my last post.

[knightrous]

Help with disc

A little bit OT, but the friction drive on Daniel Kerrisons The Aggressor works pretty well. It spins the flywheel up fairly quick with the 300psi Compressor motor and weve seen it damage a few bots, including our own. Just resently it bent 5mm thick tangent teeth on impact with a robot, and we were surprised it was going to even get the much power. I cant wait to see it with the 24v EV Warrior

[jamesb]

Help with disc

is the point not that a solid cnc one piece disc/teeth is not as likely to throw a tooth?

[jim]

Help with disc

Out of interest Ewan, how did you approach your CNC sponsors? Did you have a contact there?

[ewan]

Help with disc

I looked via the internet at different CNC companies around Bristol (my city) and I found this company to be the best in Bristol, the whole south-west even! I put together an email package with information on team history, and what we hope to accomplish in future.
I put together a 2 minute movie with all the previous robots included, and sent this off to the sponsors. Yesterday I went to their workshop/warehouse and looked about their stock etc. I also showed them the remains of all my robots... I try to be as professional as possible with my appearence to sponsors, and I try to fill every thing they wanted when they first decided to sponsor me. Now I have three sponsors, Ive decided to stop looking for more, I do not need any more...

+ James, yes, that was the idea, to stop teeth flying off...

Cheers, Ewan

[ewan]

Help with disc

* the best CNC company in Bristol

[typhoon_driver]

Help with disc

it does depend on what your teeth are made from however we personnally have never had any problems with hardox teeth welded to a steel ring. After series 7 they only require a slight sharpen after all the hits dished out.

well done ewan, if u can get big companys behind you now, imagine what you will be like in 10 years time

[mikeyg]

Help with disc

Yo Ewan you should come show off your bot in Monmouth. Were just over the bridge from you.