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[maddox]

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I see a new job coming up.

Lenny, I can make all you need, as the stuff from a DIY isnt what you can use.

Just email me the plans, and well talk about it trough Email or MSN

[blazerbotics]

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using normal threaded bar isnt a good idea, the thread is to fine and will lock up easily.

[RogueTwoRobots]

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Thanks for the replies.
Grant: The size of thread Im using is 8mm. The maximum length of the tube would be around 250mm

Alan: I wondered if that might be the case, its just the threaded rod is all Ive got as Im still getting round to buying a car jack thread (moneys currently an issue), plus the normal threaded bar fits into my drill motor driveshafts (I had to tap them because I botched the modification process and ended up cutting off the threaded axle that was already on the drill )

Mario: Thanks for the offer - itll take me a couple of days to get round to doing some plans, Im tied up with some stuff just now. I dont have/cant work CAD but I could draw them as accurately as possible in Appleworks and save them as a JPEG if this would be ok for a set of plans.

Many thanks,
Lenny

[maddox]

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Normaly it would work Lenny, just send it over and discus work.

[Guest]

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Lenny
You could go to a scrapyard and get an old car jack, look for a box/square type thread your probably get it for next to nothing or even for nothing especially if you tell them its for building a robot. It will also have the correct size threaded attachment to go up a down the thread. Thats what we ended up using in Rampage.

Ian
Team Rampage

[RogueTwoRobots]

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Thanks for that Ian, I might try that now that Im on holiday.

Mario: I sent you an email regarding the custom parts, hope you got it OK, if not let me know, and Ill send it again.

[grant_ploughbot]

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also lenny, if you use normal high tensile thread (which will be perfectly fine if well greased) then you will not need a complely threaded tube. just get someone to weld a tube on the end of a nut as that create less friction and easier to make!

[Guest]

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Im planning on building a chassis out of some sort of box section metal and i was wondering if i should use steel hollow square or aluminium hollow square? and what kind of sizes?

[woody]

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Id suggest that you use steel......( and Im basing the sizes on your previous posts stating that your hoping to build a heavy ) ... either box or angle with a 3mm wall.

So box section 25mm x 25mm x 3mm ..... or 50mm x 50mm x 3mm equal angle.

NOT ALUMINIUM for your first attempt at welding!

[Guest]

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no this is for a feather (i know im really confusing)

[Guest]

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or what about construction entirely from polycarb?

[psychostorm]

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You have 3 choices here:

A monocoque? (spelling please):
Literally meaning 1 shell in old french. Basically the posh term to mounting everything to the armour and base panels. Used often in feathers to improve armour.

A chassis. A frame and supporting structure used to hold everything to and to hold the armour in place. Weightly but has slightly more reliability.

or

a combination of the above.

If youre thinking of using polycarbonate for a shell, I recommend metal panels over the edges. you only have to see terrorhurtzs S5 battle for an answer...

Oh and Woody: Why would he post a heavyweight construction in the featherweight section???

[Guest]

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ok peeps id like to get started now on my robot. Im thinking of buying some 6mm polycarb then plating that with metal sheets. How do i work with polycarb i.e. hold it together? I might upgrade to a box steel chassis when i get the funding. I know ewans had some success with this so i was wondering if he could help

[typhoon_driver]

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If anything mark i would have thought that a steel box chassis would have been cheaper than polycarbonate unless you are getting the poly cheap. nuts and bolts are probably the best way to hold it together.

[ewan]

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mark, see http://www.micro-maul.co.uk/micro-maul%281%29.htmlhttp://www.micro-maul.co.uk/micro-maul%281%29.html
you can use thick polycarbonate sheets (of 10mm +) to make a chassis. You just have to tap it together. Dont have any exposed polcarbonate edges though as they will get caught on by a spinner and can shatter.