emag hiccups

[jaguarshark]

I'm very new to mags and just bought a used emag with xmod 1.8.

I'm overall extremely happy with the performance but I noticed if I try to shoot fast (either bursting over and over or full auto) a few seconds in the bolt won't recock or fire.

Is this short stroking or something? I hear the "splock" sound that's similar to the lvl10 anti-chop engaging. Could it be my warp feed can't keep up?

Thanks for all your help.

[Tropical Life]

I recommend check the carrier in powertube remove a shim then try. If that doesnt work put shim back and up the carrier size keep same oring. If still no change or it gets worse go back to original set-up and check your valve on off oring make sure the pin is flowing smoothly. I had a issue were the on off quad oring was getting pinched and causing bolt to act weird. Always document your start set up though for worst case you can go back to your current set-up.

Very important!!!! test in manual mode 1st then go electric.

[jaguarshark]

I recommend check the carrier in powertube remove a shim then try. If that doesnt work put shim back and up the carrier size keep same oring. If still no change or it gets worse go back to original set-up and check your valve on off oring make sure the pin is flowing smoothly. I had a issue were the on off quad oring was getting pinched and causing bolt to act weird. Always document your start set up though for worst case you can go back to your current set-up.

Very important!!!! test in manual mode 1st then go electric.

Thanks!

I removed a shim and with dry-firing it seems to fire long strings without the *chok chok chok*.

2 questions:

1) what does removing shims do, decrease the sensitivity of the level 10 and thus ensures the bolt travels?

2) it sounds like there is shootdown. Of course this is just dry firing, but what could cause that?

Thanks for all your help.

[Tropical Life]

Glad it got better.. you might find some of your answers and better understanding of the lvl 10 here:

http://automags.org/resource/level10/index.shtml

the shim question is best answered in shim adjustments:

1) The shims (5) control where in the forward stroke the air chamber starts venting.

2) Shootdown-I would chrono the marker for velocity see where you are at in manual mode. Try that 1st since your predicting, then come back with for sure results .

The sensitivity in your bolt is controlled by your powertube carrier and oring.

[OneSelfLost]

The sensitivity in your bolt is controlled by your powertube carrier and oring.

And the main spring tension. The stiffer the spring, the harder it is for the chamber pressure to overcome the bolt and move it forward far enough too vent properly, propelling the ball. With a stiffer spring, you will have to increase the velocity adjuster to overcome the spring.

Sometimes, this can result in far too high of a velocity. This is where spring trimming becomes handy. A general rule of thumb is to turn up your velocity until the gun fires consistently, then crank it up an extra 20 fps to where you want it.

Oh, and JS.. Along with everything else, Oil. Mags love oil. 4 or 5 drops in the ASA.

[jaguarshark]

Thanks guys.

[jaguarshark]

Ok I made a brief vid of my experience. Right now my emag is at 15bps, 1 shim, full auto (for testing sake).

You can see it fires about 4-5 shot and then it chokes up or cuffs. Not sure what it's commonly called.

Can you help me describe what the issue is? Should I look at the shims or something else?

Much thanks!

http://youtu.be/x2QM7dT8Fn8

[Tropical Life]

Sounds like the on/off pin is stuck, try replacing the on/off quad oring with a small oring that will drop in but wont grip the pin to hard but will let it flow.add a tad of oil in it. Test with gold spring also.

Try with your dwell at 27 atleast in electronic mode. Once you get it up and running you can drop the dwell a bit if you like.

At the end of my video I have my settings in full-auto mode try those if you like(note my demo is off a 1200 psi reg). Remember the more input pressure your regulator puts out the faster bps your gonna get. On my settings you should get with a regular reg 850 psi you should get 14 bps full auto.

http://www.youtube.com/watch?v=zsL_CYaW90I

1:19 for settings

Just to be sure you have the right on/off does it look like this:

http://www.tunamart.com/index.php?c=42&p=399

[OneSelfLost]

Might also want to check your trigger rod and plunger lengths.

From the tolerance specs sticky:

On/Off pin: .712" w/ brass top and double o-ring top.
.725" w/ aluminum top and single o-ring top.

Trigger Rod: 2.125"

Solenoid Plunger Rod: 3.005"

[Tropical Life]

^was gonna leave that for last dont wanna freak him out lol, it really sounds like the on/off pin is not flowing. I had same issue once just like that I threw in a small black oring and it was ripping nice.

Get it to shoot nice in manual mode with rapid shooting with out the hold back like its doing you will feel the difference in the trigger pull when the pin is flowing smoothly. then jump to electo, keep us posted, we will get it right for you.

Another thing it could be is the battery is low which cause is it to act like that also., make sure you have a full charge on the battery for e mode.

[OneSelfLost]

^was gonna leave that for last dont wanna freak him out lol, It really sounds like the on/off pin is not flowing. I had same issue once just like that I thru in a small black oring and it was ripping.

I'm not trying to freak him out, its an easy check and I wanna make sure all grounds are covered.

(Grab a pair of needle nose pliers, pull the E-clip off the plunger and lift the whole sear out)

But yes, I would start by pulling the on/off out, actually take the on/off apart (the top and bottom twist apart, I didn't know this for a long time), check that O-ring inside, and the top two O-rings.

[Tropical Life]

^ I know, I know j/k

[jaguarshark]

Thanks, you guys have gone beyond the call of duty. I'll do the mag surgery another day and update.

I'm a Palmer/Sheridan guy so the complex-in-comparison mag valve is a fun challenge to sort out.

[athomas]

How old is the battery? A weak battery could cause those issues, where it starts off fast and then slips up.

How old is the bolt spring? A weak bolt spring can have symptoms like that too.

Have you fully tuned your level 10 bolt? Bolt stick causes the bolt to take longer to reset. The valve cannot recharge until the bolt fully resets. If the mag fires again before the valve is fully charged due to a slow reset, the mag will cough.

[jaguarshark]

How old is the battery? A weak battery could cause those issues, where it starts off fast and then slips up.

How old is the bolt spring? A weak bolt spring can have symptoms like that too.

Have you fully tuned your level 10 bolt? Bolt stick causes the bolt to take longer to reset. The valve cannot recharge until the bolt fully resets. If the mag fires again before the valve is fully charged due to a slow reset, the mag will cough.

The battery is pretty strong, reads 18+ volts. I'll definitely tinker with the lvl10 & shims some more.

I disassembled the whole thing and played with the on/off. It's definitely very tight. How loose should it be? Should it drop down from gravity?

Thanks.