My development marker is just a 24v 1000psi air valve hooked up to a barrel. The 555 one shot circuit works by when feeding an input (pressing fire) it switches a solid state relay for duration (N). Where N is set by the combination of a capacitor and resistor. I used a pot for adjustability of the relay duration, this gives me dial-in adjustability from 0 to about 0.5 seconds. The relay operates the air valve. It works, and works very well, the problem with self-made markers is reliable reloading.....musket style operations are actually fairly easy. So I am using this to control the firing (amount of time the lead valve is open) and you are using it for essentially the same thing, except you have lower pressure and are feeding the magazine with air as opposed to the barrel.
What manufacturer/part # is your Nano PLC? Ben -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Mark_123522 Sent: Sunday, 2 May 2010 3:53 AM To: R/C Tank Combat Subject: [TANKS] Re: Got PaintBall Feed Figured out!!!!! Ben: What were you timing? Why were you timing it? The 555 sounds good for a DYI. I think I need 3 timers for my application. One to shut off the trigger, about 50 milliseconds after the trigger is initiated. Another to delay the initiation of the magazine air pulse. Another to time the duration of the magazine air pulse. You can get a "Smart Relay" or a "Nano PLC" for as low as $80. They are fully programable, you could do about any sequencing job with one. The one I ordered has 6 inputs, 4 relay outputs, and a small display. It runs off of 24 volts and is industrally hardened. With the display, I can adjust all the timing in the field, if necessary. Ben: Thanks for the offer of help, but I am going to go the "lazy mans way". Also: I have a time constrant - theres only a few weekends to get the tank ready for the Gettysburg Pensyvania battle! Mark On Apr 29, 6:16 am, Ben Holko <[email protected]> wrote: > Nice work Mark, this is a good looking setup. > > The timing portion of your reload pulse can be accomplished by building a > one-shot 555 timer circuit. I built one exactly the same to control the 24v > firing valve I have for the homemade marker, so just let me know if you need > a hand with that. > > Ben > > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of Mark_123522 > Sent: Thursday, 29 April 2010 10:24 AM > To: R/C Tank Combat > Subject: [TANKS] Re: Got PaintBall Feed Figured out!!!!! > > Here is the 63 cubic inch air tank, with the oxygen regulator attached. > See the blue, electric, air > valve.http://i192.photobucket.com/albums/z65/mm123521/HPIM0869.jpghttp > ://i192.photobucket.com/albums/z65/mm123521/HPIM0870.jpghttp://i192.ph > otobucket.com/albums/z65/mm123521/HPIM0871.jpg > > Here is the gun and copper tube magazine. > The gun rotates about the paintball feed tube when it elevates (no > elevate servo > yet):http://i192.photobucket.com/albums/z65/mm123521/HPIM0872.jpghttp: > //i192.photobucket.com/albums/z65/mm123521/HPIM0873.jpghttp://i192.pho > tobucket.com/albums/z65/mm123521/HPIM0830-1.jpg > > For a pressurized , tubular, magazine to work the end must be blocked off. > See the black, plastic, screw on, cap. > Remove the cap to load paintballs, screw it back on to seal off the loading > hole. > The cap and loading hole are accessable from the top of the turret. > Pictures show the hinged turret open. > > http://i192.photobucket.com/albums/z65/mm123521/HPIM0873-1.jpghttp://i > 192.photobucket.com/albums/z65/mm123521/HPIM0877.jpghttp://i192.photob > ucket.com/albums/z65/mm123521/HPIM0875.jpghttp://i192.photobucket.com/ > albums/z65/mm123521/HPIM0876.jpg > > This is the trigger actuator. > It is a 24 volt, DC relay, with an extension soldered on to the aramature. > The aramature extension pushes the trigger. > Works very good, because the gun has a "hall effect" trigger sensor > that requires very little force to > actuate.:http://i192.photobucket.com/albums/z65/mm123521/HPIM0878.jpgh > ttp://i192.photobucket.com/albums/z65/mm123521/HPIM0879.jpg > > Mark > > On Apr 28, 6:05 pm, Mark_123522 <[email protected]> wrote: > > I built Frank Pittelli's, air assisted, "Tubular Magazine", > > paintball feed > > system:http://www.rctankcombat.com/articles/tubular-magazine/ > > > and was dissapointed when it did not work. > > I tapped my barrel and ran a hose to the magazine as described in > > the "How To" article. > > There was practally no air pressure available to push the paintballs > > down the magazine. > > I was dissapointed, after building the system, drilling holes in my > > turret and barrel, etc, and it not working. > > > BUT: > > > I salvaged the idea. > > I got a 24 volt, electric operated air valve. > > I supply the valve with 60 PSI from a small welding (oxygen) > > regulator. > > The oxygen regulator is tapped into the 450 PSI, regulated pressure, > > from my 63 cubic inch air tank. > > > It is so powerfull that it will feed paintballs uphill! > > If you turn up the pressure, it will expell the paint ball out the > > barrel at low velocity. > > If you turn up the pressure to 125 PSI, it will move the paintballs > > with such force as to break them in the magazine! > > > Right now, I am operating the air valve manually. > > It only takes a very, very, very short burst of air to move the balls. > > > When it is finished, it will include a timing system that will > > perform the following sequence: > > 1 RC transitter signels "fire" > > 2 Rc reciever turns on a "servo switch" to activate the timing system. > > 3 timing system triggers the firing solenoid on the gun, and gun > > fires > > 4 timing system waits for .5 seconds, then pulses the air valve to > > move paintballs down the magazine, for the next shot. > > > The timing system delays the burst of air to the magazine, until the > > gun has finished shooting the paintball. This keeps the magazine air > > demand from interfering with shooting the paintball. > > The system will have adjustable air pressure(the oxygen regulator), > > and adjustable air pulse duration (from the timing system). > > > Tubular magazine is from 3/4 inch copper tubing, and holds 40 balls. > > It has a 45 degree elbow, a 90 degree elbow, and two straight > > sections. > > > When complete, I will post pictures of the system. > > > Mark > > > -- > > You are currently subscribed to the "R/C Tank Combat" group. > > To post a message, send email to [email protected] To > > unsubscribe, send email to [email protected] > > Visit the group athttp://groups.google.com/group/rctankcombat > > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] To > unsubscribe, send email to [email protected] > Visit the group athttp://groups.google.com/group/rctankcombat > > -- > You are currently subscribed to the "R/C Tank Combat" group. > To post a message, send email to [email protected] To > unsubscribe, send email to [email protected] > Visit the group athttp://groups.google.com/group/rctankcombat- Hide > quoted text - > > - Show quoted text - -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat -- You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to [email protected] To unsubscribe, send email to [email protected] Visit the group at http://groups.google.com/group/rctankcombat
