Scheduled maintenance Wednesday night, 23-May 2018. MOCpages will be offline 6:00pm to 8:00am EST to install new servers.
MOCpages : Share your LEGO® creations
LEGO models my own creation MOCpages toys shop B.P.G. (Belt-fed Pin Gun)Robotics
Welcome to the world's greatest LEGO fan community!
Explore cool creations, share your own, and have lots of fun together.  ~  It's all free!
B.P.G. (Belt-fed Pin Gun)
Rate it  12345       Add a comment Add a comment   Zoom in  Zoom in
Imagine any chain-fed gun, then wrap the ammo around it front to back.
About this creation
The basic idea originally came when I was trying make a chain-fed gun and had problems with storage/feeding, which is when I decided to just wrap the whole chain around the gun itself.

The concept is really quite simple. Each time the touch sensor is pressed, the feeding motor turns one sixth a rotation to position a new tread link, then the firing motor turns half a rotation to fire one pin. Since it alternates firing left and right pins, there are an odd number of links so that all the ones it misses on the first pass are picked up on the second.

As you can imagine, the idea of "shooting" pins by just poking them from the back really isn't very effective... I was really just trying to see if I could make it feed and shoot properly with the belt wrapped from front to back like that.

It was purely accidental, but it ended up being pretty modular. The last picture shows the whole thing deconstructed into chunks.

I guess thats about it. Enjoy!

From the side

Without the belt

The feeding mechanism detached

Close up of the feeding mechanism gearing.

From the top without the feeding mechanism

The frame that holds the belt in place while the pegs are being shot as viewed from the top

The firing pins with the belt frame removed

The central portion with feeding mechanism and NXT removed

A better view of how the firing pins are actually moved

In pieces


 I made it 
  April 7, 2010
Quoting Farhan Salman Nice. Can it shoot?
yes, but it has very little range, I was just trying to see if I could get it to work at all, not really going for effectiveness.
 I like it 
  February 9, 2010
Nice. Can it shoot?
By Dex Hahne
Add to my favorite builders

person likes this. See who.

1,248 visitors
Added January 12, 2010
 You are at the beginning of this folder.  You are at the end of this folder.
More from Dex
More across MOCpages

LEGO models my own creation MOCpages toys shop B.P.G. (Belt-fed Pin Gun)Robotics

You Your home page | LEGO creations | Favorite builders
Activity Activity | Comments | Creations
Explore Explore | Recent | Groups
MOCpages is an unofficial, fan-created website. LEGO® and the brick configuration are property of The LEGO Group, which does not sponsor, own, or endorse this site.
©2002-2018 Sean Kenney Design Inc | Privacy policy | Terms of use