If you need assistance, please send an email to forum at 4hv dot org. To ensure your email is not marked as spam, please include the phrase "4hv help" in the subject line. You can also find assistance via IRC, at irc.shadowworld.net, room #hvcomm.
Support 4hv.org!
Donate:
4hv.org is hosted on a dedicated server. Unfortunately, this server costs and we rely on the help of site members to keep 4hv.org running. Please consider donating. We will place your name on the thanks list and you'll be helping to keep 4hv.org alive and free for everyone. Members whose names appear in red bold have donated recently. Green bold denotes those who have recently donated to keep the server carbon neutral.
Special Thanks To:
Aaron Holmes
Aaron Wheeler
Adam Horden
Alan Scrimgeour
Andre
Andrew Haynes
Anonymous000
asabase
Austin Weil
barney
Barry
Bert Hickman
Bill Kukowski
Blitzorn
Brandon Paradelas
Bruce Bowling
BubeeMike
Byong Park
Cesiumsponge
Chris F.
Chris Hooper
Corey Worthington
Derek Woodroffe
Dalus
Dan Strother
Daniel Davis
Daniel Uhrenholt
datasheetarchive
Dave Billington
Dave Marshall
David F.
Dennis Rogers
drelectrix
Dr. John Gudenas
Dr. Spark
E.TexasTesla
eastvoltresearch
Eirik Taylor
Erik Dyakov
Erlend^SE
Finn Hammer
Firebug24k
GalliumMan
Gary Peterson
George Slade
GhostNull
Gordon Mcknight
Graham Armitage
Grant
GreySoul
Henry H
IamSmooth
In memory of Leo Powning
Jacob Cash
James Howells
James Pawson
Jeff Greenfield
Jeff Thomas
Jesse Frost
Jim Mitchell
jlr134
Joe Mastroianni
John Forcina
John Oberg
John Willcutt
Jon Newcomb
klugesmith
Leslie Wright
Lutz Hoffman
Mads Barnkob
Martin King
Mats Karlsson
Matt Gibson
Matthew Guidry
mbd
Michael D'Angelo
Mikkel
mileswaldron
mister_rf
Neil Foster
Nick de Smith
Nick Soroka
nicklenorp
Nik
Norman Stanley
Patrick Coleman
Paul Brodie
Paul Jordan
Paul Montgomery
Ped
Peter Krogen
Peter Terren
PhilGood
Richard Feldman
Robert Bush
Royce Bailey
Scott Fusare
Scott Newman
smiffy
Stella
Steven Busic
Steve Conner
Steve Jones
Steve Ward
Sulaiman
Thomas Coyle
Thomas A. Wallace
Thomas W
Timo
Torch
Ulf Jonsson
vasil
Vaxian
vladi mazzilli
wastehl
Weston
William Kim
William N.
William Stehl
Wesley Venis
The aforementioned have contributed financially to the continuing triumph of 4hv.org. They are deserving of my most heartfelt thanks.
Registered Member #3315
Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
i am trying to work out the best way to make a semi auto mechanism for my new multi stage coilgun. I am looking for suggestions/links to other similar projects and ideas. i need something to smack my projectiles out of the clip, down the barrel and to trigger the optical switch.
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
Gravity fed? design it so that when you press the trigger, it pulls a pin which allows a slug to fall into the chamber. or a pump action sort of thing where the pump pulls the pin, then the trigger shoots it. A pump action coil gun... XD that just SOUNDS awesome!!
Registered Member #3315
Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
it is not gravity feed, attached is a design i made. orange is the nerf gun clip i modded . yellow is the cap chargers. i have yet to make the stock which is where the injector solinoid will be. as you can see i need to get the shels moving forward out of the clip to activate the 3 optical switches. i want to be able to inject the shells with just the battery and not use additional caps if i dont have too.
Registered Member #1451
Joined: Wed Apr 23 2008, 03:48AM
Location: Boulder, Co
Posts: 661
Any kind of solenoid should do; you're not looking for efficiency. Just make sure it has a spring in it to pull the plunger back in after it kick the projectile out of the clip.
Registered Member #3888
Joined: Sun May 15 2011, 09:50PM
Location: Erie, PA
Posts: 649
You can turn a pull solenoid into a push by drilling out through the back of the solenoid and attaching an aluminum bar to the plunger. then put pins in the aluminum and plunger to restrict the range of motion you want (and so it doesn't fly out either end of the solenoid.) last, add a spring between the solenoid and the plunger pin so it returns to it's initial position. Or you could find/buy yourself a push solenoid and, if necessary, rewind it to pack a bigger punch.
Registered Member #4237
Joined: Tue Nov 29 2011, 02:49PM
Location:
Posts: 117
Why not make a spring-loaded mechanism? I imagine that would be much easier than using a solenoid. You could use a tube with a cap in one end, and a spring fastened to the cap. Shove your projectile into the tube, and lock it with a pin or something.
Registered Member #1525
Joined: Mon Jun 09 2008, 12:16AM
Location: America
Posts: 294
ben5017 wrote ...
it is not gravity feed, attached is a design i made. orange is the nerf gun clip i modded . yellow is the cap chargers. i have yet to make the stock which is where the injector solinoid will be. as you can see i need to get the shels moving forward out of the clip to activate the 3 optical switches. i want to be able to inject the shells with just the battery and not use additional caps if i dont have too.
I like your design, it looks very efficient in terms of space and parts usage. I think a 12V solenoid with a spring return would be the best way to inject your projectiles if you want to have semi-automatic operation. You'll just want to be sure that the solenoid can hit your projectiles with enough force to knock them out of the magazine and all the way to your first coil.
Registered Member #3315
Joined: Thu Oct 14 2010, 04:23PM
Location:
Posts: 156
my solenoid came in. what do you think the 3rd lead is for?, there was no spec sheet on the site when i ordered it... do i need to put a back emf protection diode to protect the battery? or jus hook it up?
Registered Member #1525
Joined: Mon Jun 09 2008, 12:16AM
Location: America
Posts: 294
The third lead may just be connected to the case, can you check it with a multimeter? You should connect an anti-parallel diode across the solenoid terminals, since it is an inductor. This is necessary to protect your switch rather than the battery.
This site is powered by e107, which is released under the GNU GPL License. All work on this site, except where otherwise noted, is licensed under a Creative Commons Attribution-ShareAlike 2.5 License. By submitting any information to this site, you agree that anything submitted will be so licensed. Please read our Disclaimer and Policies page for information on your rights and responsibilities regarding this site.
injector
