Polycarb thickness

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mole55
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Polycarb thickness

Postby mole55 » Wed Mar 23, 2016 12:20 am

Is 3mm Polycarb all round too thick? I haven't seen any robots using it, but having looked at the internals, I have about 70g to spare on a 100x90x20 robot.

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joey_picus
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Re: Polycarb thickness

Postby joey_picus » Wed Mar 23, 2016 5:19 am

It's far too thick XD Matweb (hopefully not down by the time you read this) will give you a rough idea of material weight for a given thickness and dimensions. The usual approach is to have thinner (1-1.5mm) polycarb all around, or thicker (4-5mm) serving as a chassis bulkhead while the rest is thinner and just armour. Have a play around though and see what works, but 3mm all around is almost certainly overkill and overweight!
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
"These dreams go on when I close my eyes...every second of the night, I live another life"

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Shakey
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Re: Polycarb thickness

Postby Shakey » Wed Mar 23, 2016 8:33 am

1.5mm or 2mm is as thick as you really need to go in ants, it's plenty tough.
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mole55
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Location: Pilling,Lancashire

Re: Polycarb thickness

Postby mole55 » Wed Mar 23, 2016 1:20 pm

Slightly off topic, but how would you attach bulkheads to an antweight whilst still being able to attach armour?
Last edited by mole55 on Wed Mar 23, 2016 3:50 pm, edited 1 time in total.

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joey_picus
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Re: Polycarb thickness

Postby joey_picus » Wed Mar 23, 2016 2:19 pm

You do it here and then in America, surely?
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
"These dreams go on when I close my eyes...every second of the night, I live another life"

mole55
Posts: 28
Joined: Tue Mar 08, 2016 12:09 am
Location: Pilling,Lancashire

Re: Polycarb thickness

Postby mole55 » Wed Mar 23, 2016 3:52 pm

Thanks for pointing that out.

May have been trying to multitask there. Eating, having a conversation and typing at the same time is a bad idea. I've edited it now.

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joey_picus
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Re: Polycarb thickness

Postby joey_picus » Wed Mar 23, 2016 4:51 pm

That it is :) The way I did it on S. D. F. was to have the bulkheads be thick enough to drill and tap into (1/4" aluminium and then 5mm nylon 6, with M2 holes/bolts) and just mount the armour directly to those, but you could also use brackets (which works better if you want non-90 degree angles). There's going to be other solutions too, it's worth experimenting!
Joey McConnell-Farber - Team Picus Telerobotics - http://picus.org.uk/ - @joey_picus
"These dreams go on when I close my eyes...every second of the night, I live another life"


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