Magazine problem

Voice your input! Discuss anything to do with SpudFiles.com or community it's self. Constructive discussions only. This is a place to express thoughts about making the community better.
Haniball1337
Private 4
Private 4
Poland
Posts: 70
Joined: Thu Mar 07, 2019 12:38 pm

Sat Jan 04, 2020 4:58 pm

Hi guys , Happy New Year :D . As always i have problem... I just started building a 4,5 mm BB Semi auto Airgun , but the magazine doesnt work that i wanted. QEV is piloted by 1/8, 5/2 solenoid valve converted into 3/2 NO. Magazine is gravity feed (with spring the same happens) and detent is a magnet that is holding bb in barrel. It is just normal tee. I tested it and when i shoot it shoots 1 bb or sometimes it shoots 2 bbs or often one bb is shooted and after that, another 2 bb are blown, just dropping of the barrel. Magazine tube is the same ID as barrel (4,5mm) What do you guys think is the problem?
Images

https://zapodaj.net/51c77b74bda28.jpg.html
https://zapodaj.net/0776da9004655.jpg.html
https://zapodaj.net/4517946765b0a.jpg.html <-------- Magnet on top magazine
https://zapodaj.net/d6bdb428060be.jpg.html <-------- 1/2 chamber
https://zapodaj.net/1daff0927d9b1.jpg.html
https://zapodaj.net/db9571a420cb7.jpg.html
https://zapodaj.net/e71c0b61765aa.jpg.html <--------- Magnet holding bb ready to fire
https://zapodaj.net/d08d9d1f3183a.jpg.html <--------- Barrel inside aluminum tube
https://zapodaj.net/411e0d22f7fce.jpg.html
User avatar
farcticox1
Sergeant
Sergeant
Posts: 1077
Joined: Sun Mar 31, 2013 12:37 pm
Has thanked: 68 times
Been thanked: 93 times

Sat Jan 04, 2020 8:31 pm

I have tried similar and it will always happen like that, there is too much air just to launch one BB, it will try to launch the next one or two at a reduced velocity, so they just roll down the barrel. If you want semi auto you need to block the magazine tube somehow between each shot, that's the tricky bit. I did it with a seperate loading piston viewtopic.php?f=29&t=26692
User avatar
jrrdw
Moderator
Moderator
United States of America
Posts: 6569
Joined: Wed Nov 16, 2005 5:11 pm
Location: Maryland
Has thanked: 39 times
Been thanked: 22 times
Contact:

Donating Members

Sun Jan 05, 2020 6:25 am

farcticox1 wrote:
Sat Jan 04, 2020 8:31 pm
I have tried similar and it will always happen like that, there is too much air just to launch one BB, it will try to launch the next one or two at a reduced velocity, so they just roll down the barrel. If you want semi auto you need to block the magazine tube somehow between each shot, that's the tricky bit. I did it with a seperate loading piston viewtopic.php?f=29&t=26692
I would incorporate a inline paddle wheel of sorts with the partitions just big enough for one BB at a time. Use a external adjustment to control the ROF. This would be replacing one mechanism for another but you would gain on the fly tuning, downsize the over all size. Just off the top of my head, probably has been done before...
Haniball1337
Private 4
Private 4
Poland
Posts: 70
Joined: Thu Mar 07, 2019 12:38 pm

Sun Jan 05, 2020 7:36 am

farcticox1 wrote:
Sat Jan 04, 2020 8:31 pm
I have tried similar and it will always happen like that, there is too much air just to launch one BB, it will try to launch the next one or two at a reduced velocity, so they just roll down the barrel. If you want semi auto you need to block the magazine tube somehow between each shot, that's the tricky bit. I did it with a seperate loading piston viewtopic.php?f=29&t=26692
So there is no chance of magazine with magnet detent working reliably?
Haniball1337
Private 4
Private 4
Poland
Posts: 70
Joined: Thu Mar 07, 2019 12:38 pm

Tue Jan 07, 2020 8:05 am

What if i will remove magnet detent and I will make ball detent?
Post Reply