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Author Topic: Hello made my first minigun  (Read 3908 times)

MikeOD

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Hello made my first minigun
« on: March 08, 2011, 09:31:15 AM »

Hi there, new to this forum, I think it looks good lots of activity. I started airsofting with a Barret M99 sniper, then went to a scar, then a g36k and an ASR, now I just made my first minigun. Airsoft can get addicting can't it :)

1.Version 3 gearbox 7mm
2.Shortstroked piston 3 teeth
3.Reshimmed according to the height of the motors pinion gear.
4.Matrix 3000 magnum short style motor with neomydium magnets.
5.Rotating barrels powered by cordless 18v drill motor.
6.20,000 bb capacity ammo box
7.Modified auto winding hicap mag powered by a 3.7 volt motor running off a 3.7 volt lithium ion 18650 battery
8.Laser pressure switch controls a mosfet rated at 65 continuous amps for firing operation.
9.Angle of engagement on the piston has been corrected and fires at 21 rounds per second on standard factory JG gearset.
10.PVC and steel construction.



« Last Edit: March 08, 2011, 09:38:45 AM by MikeOD »
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kdb135

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Re: Hello made my first minigun
« Reply #1 on: March 08, 2011, 09:48:21 AM »

Moar picturez! So sexy. lol
How long did that take you?
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Atilla

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Re: Hello made my first minigun
« Reply #2 on: March 08, 2011, 10:03:43 AM »

nice work. welcome.
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Elephant_Gunner

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Re: Hello made my first minigun
« Reply #3 on: March 08, 2011, 12:27:23 PM »

That is the best 3rd post in history! Show us more! Any pics of it being built?
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MikeOD

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Re: Hello made my first minigun
« Reply #4 on: March 08, 2011, 01:33:32 PM »

Moar picturez! So sexy. lol
How long did that take you?


It took me between 3-4 days to make minus the racking of the brain to figure some things out. It would have gone faster if I had access to a drill press and some other stationary power tools, this was built all by hand...hacksaw, dremel, rotozip, files, cordless drill and a whole lotto elbow grease. Whats nice about it is it is completely self contained, no backpacks to wear, heck you can even go hands free if you need to take a long range shot

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Atilla

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Re: Hello made my first minigun
« Reply #5 on: March 08, 2011, 01:41:50 PM »

don't double post.
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DRK

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Re: Hello made my first minigun
« Reply #6 on: March 09, 2011, 12:02:48 AM »

i had an old kill bucket MOCKup. i really need a way to get mine up to a facsimile of yours.
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airsoftflamer

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Re: Hello made my first minigun
« Reply #7 on: March 09, 2011, 12:19:19 AM »

out of curiosity, does it shoot out of each rotating barrel or does it just shoot out the middle and look BA with the spinning barrels?

It's awesome either way.
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DangerWerx

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Re: Hello made my first minigun
« Reply #8 on: March 09, 2011, 01:17:49 AM »

Dude, Kudos.

if this forum had a rep system, I would upvote you in a heartbeat.

Any clue on estimated man hours?
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Atilla

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Re: Hello made my first minigun
« Reply #9 on: March 09, 2011, 08:06:11 AM »

did you miss the part where i said "don't double post" and now you go on to make three posts back-to-back? go read the forum rules. if you can figure out how to build that minigun you can figure out how to copy and paste quoted text into one reply.

i'm only being so nice because this is a cool project thread, but it's not a smart idea to blow off the people with the gold stars when they give you a suggestion.
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MikeOD

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Re: Hello made my first minigun
« Reply #10 on: March 09, 2011, 09:37:19 AM »

did you miss the part where i said "don't double post" and now you go on to make three posts back-to-back? go read the forum rules. if you can figure out how to build that minigun you can figure out how to copy and paste quoted text into one reply.

i'm only being so nice because this is a cool project thread, but it's not a smart idea to blow off the people with the gold stars when they give you a suggestion.

Sorry didnt mean to double, thought it was ok to reply twice, but now that I know, I won't do that again. It makes sense, just to copy and paste I got it now :) I'll fix it like this:

Quote from: airsoftflamer on March 09, 2011, 12:19:19 AM
out of curiosity, does it shoot out of each rotating barrel or does it just shoot out the middle and look BA with the spinning barrels?

It's awesome either way.

This fires through the center axle assembly, to have something homemade, that fires in synch through each barrel....thats my next project. Thats most likely why echo 1 and CA miniguns cost 3,500. Easiest way to do a setup like that in my opinion would be......wait a minute, dude you just gave me an awesome idea for a homemade firing timer, thanks for this post, more on the build of the timer to come


Quote from: DRK on March 09, 2011, 12:02:48 AM
i had an old kill bucket MOCKup. i really need a way to get mine up to a facsimile of yours.

If I had to give advice on which parts to use for the mechanics of it, I would say either a p90, m14 or m249 gearbox for the internals, as the motors run horizontally behind  the gearbox instead of coming off the bottom. Killbuckets got some cool guns, but he's also got a cnc shopbot he uses to cut patterns out with. That takes all the hard work out of it. If I can help let me know, I got a few good ideas kickin around.


Quote from: DangerWerx on March 09, 2011, 01:17:49 AM
Dude, Kudos.

if this forum had a rep system, I would upvote you in a heartbeat.

Any clue on estimated man hours?

well, my next one should go alot smoother, now its just tweaking my methods, but it took me 3-4 days, 10-12 hours aday with normal stuff going on too. I had some wasted time in there too, u know sometimes you do one thing when you should have done another first. It was a cool learning experience, and I might start making them and doing giveaways. If I get enough interest I'll make a few and try it out. I would set a standard for the quality of the giveaway guns, 3 rules I would set for myself, #1 It has to hold 20,000 bb's or more. #2 It has to look cool and feel comfortably balanced when strapped. #3 You have to be able to hold the trigger down and blast away like a madman on a mission with no problems and no overheating.
« Last Edit: March 09, 2011, 09:53:06 AM by MikeOD »
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Dread_Roberts

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Re: Hello made my first minigun
« Reply #11 on: March 10, 2011, 09:09:17 PM »

Mike, I was very impressed with your work, the first I saw it was in your shimming video actually, and had thought it was an echo 1 just glancing at it while focused on the shimming.

(I'm shimming my very first GB at the moment...and its helical.  ??? nothing is working atm, but I'm closer than I was before watching your vid.)

Kudos and thanks for sharing.
 
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MikeOD

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Re: Hello made my first minigun
« Reply #12 on: March 11, 2011, 08:48:48 AM »

Mike, I was very impressed with your work, the first I saw it was in your shimming video actually, and had thought it was an echo 1 just glancing at it while focused on the shimming.

(I'm shimming my very first GB at the moment...and its helical.  ??? nothing is working atm, but I'm closer than I was before watching your vid.)

Kudos and thanks for sharing.
 

I am going to make a few more videos on the gearboxes I have, the 2 aps-2 snipers I own(ASR and M99), how I rebuild them and and modify, this time nice and clear, straight to the point and super easy to follow. Hopefully they help some people out.

My next minigun project is going to have a backpack capable of holding over 50,000 rounds, and a variable voltage controller  to run the mosfet lipo ready gearbox at whatever voltage I want between 7.4 and 12v.

I need to re-do the shimming video, I hope it helped, but I was frazzled when I made it, it was kind of tough to get my point across.
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dman58

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Re: Hello made my first minigun
« Reply #13 on: March 14, 2011, 10:52:42 AM »

great work! i had an idea for awhile but im still trying to work it out...

when most people thing of shooting out of 6 barrels they imagine timing it for the gearbox to shoot through each one at a time... well i guess this is a realistic approach, but i thought a easyer (but more expensive) approach would be to buy 6 seperate gearboxes and attatch to each barrel.
some pros:
6 times the rof :P
simpler design (well, u might have a better idea for a timing mech lol)
still runs off battery power (unlike vortex guns which also have high rof).

some ideas that could help:
for wiring the gearboxes to the battery, i thought of a useable idea...
since theyre all spinning, the positive could be connected to the axle/bearing, and the negative around the bearing (separated by a nylon spacer of course) and having a metal wheel on top to make the connection when its spinning around. this setup would be wired in paralel and therefore an increase in battery current would be necesary rather than voltage, so basically a super large lipo in a backpack is perfect :P



the only thing i havent worked out yet is the loading mechanism. an idea i got just now would be to have each of the hopup chambers (where the bbs go in) facing outwards, and inside a aluminum piece, than another piece above it with many holes in it for the bbs to force themselves in when the barrels are spinning

or

posibly a rotation assisted gravity mechanism?


great build and i wish you good luck on your next one!!
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SVT Cobra

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Re: Hello made my first minigun
« Reply #14 on: April 02, 2011, 07:21:28 PM »

Awesome build project man! Definitely post more pics!

Trijicon432

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Re: Hello made my first minigun
« Reply #15 on: April 02, 2011, 07:30:05 PM »

Good job, impressive work :D
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Cyrils Scribe

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Re: Hello made my first minigun
« Reply #16 on: April 02, 2011, 08:22:58 PM »

Having six barrels would increase the problem of gearbox failure almost by an order of magnitude though...
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