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What to machine...

A place to ask general spud cannon related questions.
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What to machine...

Unread postAuthor: CS » Wed Dec 05, 2007 1:01 am

Hey everyone! Some of you may remember me, I've been a member for over 2 and a half years. (Used to also be a mod) Anyway, I switched hobbies a year or so ago to machining. Now I have a CNC mill, and a manual lathe.

I would like to make a entrance back into spudding. So my question to you is, what to make?

I'd like to stick to typical ABS/ PVC construction for the sake of cost, however I am not so strapped to cost that I can't get adventurous in design. Just in the few hours I thought about it I was thinking maybe a piston valve (duh!), nice barrel supports, etcetera.

So is there any cool ideas you'd like to see get built?

(I'm a bit of a neat/ simple freak, so suggestions even as to refine a operation would be awesome)

Thanks all!
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Re: What to machine...

Unread postAuthor: Novacastrian » Wed Dec 05, 2007 1:06 am

I am also a neat, simple Freak!
I would like you to think about making some Hybrid Cartridges, as suggested by JSR a while ago.
After you perfect those you could make a "Hybrid Revolver" or similar.
Just my thoughts, btw i am jealous of you cnc milling capabilities
:D
Edit: As suggested with this pic Image
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Last edited by Novacastrian on Fri Dec 07, 2007 5:51 pm, edited 2 times in total.
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Unread postAuthor: homedepotpro » Wed Dec 05, 2007 1:13 am

did you make or buy the cnc mill
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Unread postAuthor: pyrogeek » Wed Dec 05, 2007 1:26 am

A nice bolt action for a gun would be cool. One that doesn't look jerry rigged.
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Unread postAuthor: MrCrowley » Wed Dec 05, 2007 1:38 am

Welcome back.

What about that secret piston valve of yours that you never posted. The one with the signature pink seal? No one else will have a clue what i'm talking about.

I suggest you look at some of PVC Arsenal's cannons, like 'Fish Killer' and the 'Omega Project' or something like that. PVC always does really clean looking barrel supports.

Oh and maybe a break-barrel? Just a thought.
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Unread postAuthor: Novacastrian » Wed Dec 05, 2007 2:39 am

MrCrowley wrote:Welcome back.

What about that secret piston valve of yours that you never posted. The one with the signature pink seal? No one else will have a clue what i'm talking about.

I suggest you look at some of PVC Arsenal's cannons, like 'Fish Killer' and the 'Omega Project' or something like that. PVC always does really clean looking barrel supports.

Oh and maybe a break-barrel? Just a thought.


No, i have no idea, Care to elaborate on the details of said "Secret piston valve"?
May i ask Pimpmann, what ideas you had in mind?
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Unread postAuthor: MrCrowley » Wed Dec 05, 2007 2:50 am

It's up to pimpmann, but the thread still exists if he wants me to copy the contents.
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Unread postAuthor: jackssmirkingrevenge » Wed Dec 05, 2007 3:00 am

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Last edited by jackssmirkingrevenge on Wed Dec 05, 2007 4:50 am, edited 1 time in total.
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Unread postAuthor: CS » Wed Dec 05, 2007 4:18 am

Just to give you guys a idea of what I'm thinking:

Image

Image

[Pneumatic Cylinder Loader]
-Similar in design to NeoSpud's CylBolt, however the brackets would be aluminum, or plastic. As well the loading is a tad bit different covering the hole for loading with a bored coupler.

    Yellow - 2" Coupler
    -----[bored]

    Blue - Sleeved GB Barrel
    -----[2" sch. 80/ 1.5" SDR-21 (Class 200)]

    Green - Aluminum brackets
    -----[.75" thick]

    Red - Pneumatic Cylinder
    -----[2" stroke, ~1.125" body diameter, 5/32" rod diameter]

The diagrams are showing the port covered, however in the retracted position the loading port would be exposed. Also worth noting, in the retracted position the coupler bracket will come in contact with the neighboring cylinder bracket. Such a addition shouldn't be much money. ~$25 I'd guesstimate.

[Responses]

[Novacastrian]
*elaboration of "secret piston valve"* Nothing particularly special. All that was different is the sealing face used some pink rubber I'd found. The excitement surrounding it was more out of humor, rather then out of technicality. As far as I know it's functionality is the same as any other rubber. I've built it, but haven't made a chamber for it. Who knows, maybe I was aware of something then that I am not now aware of...

ImageImage
[Pictures I snapped a LONG ass time ago]



[homedepotpro]
Unrelated to the threads purpose, but whatever. It's a SIEG x2 mill that I put a CNCFusion ballscrew conversion kit on. Then got a Xylotex 4 axis driver board, with 425 oz. motors. (AKA I kissed ~1.5K's ass good bye...)

[MrCrowley]
I'll have to take a peek at his cannons. (PVCArsenal's) Break barrel. Erm... no.
:geek:

[JSR]
Always been a fan of your concepts; SpudTech through SpudFiles. About the mentioned design. That'd be fun to turn out of metal. Problem may be cost. Your gonna have to obviously dish out money for each schrader. Interesting indeed, this is something I'll have to take a look into.

[Note]
If possible, images make your post and idea a lot more interesting. I'm sure mine and JSR's stood out a bit more. Something I thought I'd say.
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Unread postAuthor: jackssmirkingrevenge » Wed Dec 05, 2007 5:02 am

Would it be possible to have some bits machined (against payment, of course) - I modified the design slightly to reduce the proportion of metal bits needed, in this case i would just need the light grey threaded portion. How much do you think that would cost made from aluminium of brass (whichever's cheapest)?
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Unread postAuthor: WOW!! » Fri Dec 07, 2007 5:40 pm

Why not a whole cannon? Machine a mini combustion out of some billet. That would be nice.
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Unread postAuthor: CS » Fri Dec 14, 2007 1:06 am

Odd, some how I managed to miss both Jack's, and Wow's post. Sorry.

Jack-
What dimensions we talking here? The largest tap&die I have is 1/2" NPT. If it requires me to lathe the threads, you might have a problem. My current method of turning threads requires me to leave a ~.5" or so trough for the the lathe to slow. I know there is the alternate means, however as of now that is my only way of turning threads.

Wow-
Not really into "mini" launchers, however making a complete cannon is not out the question. Sort of limited however given cost.
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Unread postAuthor: Novacastrian » Fri Dec 14, 2007 1:19 am

pimpmann22 wrote:Odd, some how I managed to miss both Jack's, and Wow's post. Sorry.

Jack-
What dimensions we talking here? The largest tap&die I have is 1/2" NPT. If it requires me to lathe the threads, you might have a problem. My current method of turning threads requires me to leave a ~.5" or so trough for the the lathe to slow. I know there is the alternate means, however as of now that is my only way of turning threads.

Wow-
Not really into "mini" launchers, however making a complete cannon is not out the question. Sort of limited however given cost.


Pimpmann, i use a rather large lathe to turn my threads, i just turn down the rpm, what is the lowest rpm setting on your lathe? Also how big is your lathe?(mine has a 660mm swing and a 2 meter bed.
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Unread postAuthor: CS » Fri Dec 14, 2007 2:51 am

HF 8x12 (pretty damn big lathe you got)

125RPM being the lowest possible setting.

Now I have never had proper training on how to thread with a lathe. When I tested it out I would leave the leadscrew engaged, and simply reverse the carriage back each time (via the motor) Ideally don't you want to disengage the carriage when the threads finish?
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Unread postAuthor: A-98 » Fri Dec 14, 2007 5:32 am

ive pretty much stopped building, just cause i got limited by parent, money, and interest. but lately ive had that itch.

i was just asking pimpmann which lathe he would suggest for me, and once i get back to the states, i think im gonna get that, a drillpress/mill, and build a home caster. so this thread is relevant to my interests.

also, pimp, that lathe you suggested clicky, can do up to 7" pieces? am i reading that correctly (not an expert on lathe terms)
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