Author Topic: Team Psyclone - The Build Diaries  (Read 12719 times)

Offline TheDerpedOne

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Re: Team Psyclone - The Build Diaries
« Reply #40 on: January 09, 2012, 04:54:16 PM »
The design on SketchUp is almost done, could have the parts by Wednesday, All I need to know is the amount of each type of wire to get, and what material to put beneath the motors, so they're in the middle.

Offline Vertigo

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Re: Team Psyclone - The Build Diaries
« Reply #41 on: January 10, 2012, 01:52:27 AM »
HDPE

Offline TheDerpedOne

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Re: Team Psyclone - The Build Diaries
« Reply #42 on: January 12, 2012, 11:16:30 AM »
Okay, I've ordered the parts, the design is done, but a tiny problem.. Direct Plastics seems to not be safe at all, and there's only one hobby shop I know, which will mist likely not have HDPE, or anything else, that's good enough.

@R1885 Which metal should I use? I honestly don't know what is strong for the rammer.


Offline Tweedy

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Re: Team Psyclone - The Build Diaries
« Reply #43 on: January 12, 2012, 11:48:52 AM »
direct plastics is very reliable, i use them for all my plastics

Offline SKBT

Re: Team Psyclone - The Build Diaries
« Reply #44 on: January 12, 2012, 12:38:15 PM »
Your local walmart, dollar store (or whatever you call them in the UK) or kitchen store sell UHMW cutting boards. UHMW is similar to HDPE.

I've used it for a couple of my bots.

Offline Squirrel_Monkey

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Re: Team Psyclone - The Build Diaries
« Reply #45 on: January 12, 2012, 01:31:47 PM »
dollar store (or whatever you call them in the UK)
Pound Shop?
Better than GK since 2009.
I think SM is a pretty cool guy, eh builds unicycle-bots and doesn't afraid of anything

Offline haz

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Re: Team Psyclone - The Build Diaries
« Reply #46 on: January 12, 2012, 02:25:34 PM »
direct plastics are fine.
you will want ti for the front.
shutta your gaping noise void woman!!

Offline TheDerpedOne

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Re: Team Psyclone - The Build Diaries
« Reply #47 on: January 12, 2012, 03:16:28 PM »
The thing is, that Direct Plastics isn't a trusted website, according to chrome, and the 'Powered By Dreams' page didn't show. It's not like I don't trust anyone, but I prefer to be cautious.

I'll check it out with some sort of website checker.

Offline Vertigo

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Re: Team Psyclone - The Build Diaries
« Reply #48 on: January 12, 2012, 03:26:57 PM »
I'm pretty sure direct plastics is fine  ;)

Offline TheDerpedOne

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Re: Team Psyclone - The Build Diaries
« Reply #49 on: January 12, 2012, 03:47:37 PM »
Well, I guess it couldn't hurt to see.

Offline haz

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Re: Team Psyclone - The Build Diaries
« Reply #50 on: January 12, 2012, 03:54:10 PM »
bourght from there numerous times, now problems but like you say couldnt hurt
shutta your gaping noise void woman!!

Offline R1885

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Re: Team Psyclone - The Build Diaries
« Reply #51 on: January 12, 2012, 10:36:45 PM »
7075 aluminum is light weight, strong, and sells at a good price.

Offline haz

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Re: Team Psyclone - The Build Diaries
« Reply #52 on: January 13, 2012, 02:12:01 AM »
nah, alu on ants never goes well
shutta your gaping noise void woman!!

Offline R1885

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Re: Team Psyclone - The Build Diaries
« Reply #53 on: January 13, 2012, 08:22:03 AM »
This is not cheap hardware store aluminum, this is the kind they send into space.

Offline MikeNCR

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Re: Team Psyclone - The Build Diaries
« Reply #54 on: January 13, 2012, 08:48:46 AM »
This is not cheap hardware store aluminum, this is the kind they send into space.

Exactly. To give an idea, the chassis for Moros is entirely 7075 aluminum in 1/4" and 1/8" thicknesses, and as/if things break on Nyx, they'll be replaced with 7075. (using 6061 for now since it's not seeing nearly the shock loads)

6061 data-
http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA6061t6

7075 data-
http://asm.matweb.com/search/SpecificMaterial.asp?bassnum=MA7075T6

Relevant info:

6061 yield strength: 40,000psi (pounds per square inch)

7075 yield strength: 73,000psi

Also, if you're not careful, you might not even get 6061 at a hardware store. Another common aluminum is 5052, and if it's in the annealed state, you've only got 13,000psi yield strength.

Yield strength may not mean much to you, but the scale is linear, so you can at least get a relative idea on strengths.

Offline haz

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Re: Team Psyclone - The Build Diaries
« Reply #55 on: January 13, 2012, 11:24:54 AM »
i stick to my point, aluminum is pretty bad in antweights. go ti.
shutta your gaping noise void woman!!

Offline Vertigo

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Re: Team Psyclone - The Build Diaries
« Reply #56 on: January 13, 2012, 02:15:31 PM »
Yeah, I'd go for titanium too

Offline TheDerpedOne

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Re: Team Psyclone - The Build Diaries
« Reply #57 on: January 13, 2012, 05:03:08 PM »
Well, I'll try to find some good ti, I've currently got my HDPE, hoping that everything come soon enough.

Offline TheDerpedOne

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Re: Team Psyclone - The Build Diaries
« Reply #58 on: January 17, 2012, 12:01:36 PM »
Sorry to DP, but my motors n' such arrived today, so that was a nice surprise. My only problem is that- How would I go about fixing the chassis together, while being accessible?

Offline MikeNCR

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Re: Team Psyclone - The Build Diaries
« Reply #59 on: January 17, 2012, 12:05:18 PM »
There's a ton of different approaches to that, and which will work best depends on what you've got access to and what you're comfortable doing.

Quoted from my intro guide at http://nearchaos.net/guide.html

Quote
Chassis Construction

  Chassis construction generally takes one of a few different routes. The   first is an internal frame with armor attached to it, the second uses   the frame members as armor, often with connected plates of material   forming the structure, and the third is unibody construction, where the   majority of the frame and armor are cut from a single piece of material.   

  Building a chassis using an internal frame with armor panels mounted to   it tends to be the heaviest of the three options, though often will be   the most durable and easiest to repair as the portions of the armor most   likely to be damaged are easier to remove from the rest of the robot.   These frames typically involve a welded frame with armor bolted to it.

  Frame as armor construction is generally in the middle when looking at   strength vs. weight. By reducing frame and armor into a single part, you   can reduce the size of the machine and use relatively thick materials   in areas likely to come into contact with weapons. Frames like this are   more often than not bolted together.

  Unibody construction will typically be the strongest per pound, however   it is also the most complicated to manufacture, as all features will   need to be added to a single piece of material. This often involves   repositioning the work piece many times during the construction process.   Care must be taken to avoid misalignment of holes as the work piece is   moved. The good strength to weight ratio, the best of the three   mentioned, is due to the reduced need for fasteners to hold the chassis   together and the lack of areas only held on by hardware.

There's tons of different factors to look at. As of late, I've been using flat sheets with hole patterns in them with Nutstrip attached to connect panels at right angles- http://kitbots.com/product.sc?productId=17&categoryId=1