ULT = Runaway :: Help!!

[Resurection]

OK, so I got this Devilmag that is using a ULT with I beleive 9 shims in it right now. I have this problem with it running away sometimes.... ok, a LOT. I can actually hold the trigger OUT and smack the back of the valve (like you would if the bolt was stuck) and shoot the gun EACH time I hit the back.

So, I have upped the debounce and such on the board, no help there. Should I try to remove one shim in the ULT to see if that helps? Or do you think the number of shims is needed for the Hyperframe 'noid to stay consistent?

[athomas]

Maybe it is a simple as a faulty switch that is activating with any vibration.

In order for the gun to fire, the sear has to release the bolt. If the bolt is being released on the first shot just by hitting the back of the valve, then it is evident that the electronics are being triggered (unless the electronics are turned off). That means that even if the trigger is not hitting the switch, you are getting a switch closure somehow.

If the problem is happening even without the electronics turned on, then you have a sear related problem. It could be that there are too many shims in the ULT, causing the sear to barely hold the edge of the bolt. A simple hit/vibration causes a release.

[Resurection]

I will try it with the electronics off... let you know as soon as I get more air.

[11 Bravo]

Yeh try it with the electronics off and if it still does it you could probably get away with removing a couple of shims. I think I have 6 or 7 in mine. You may have to readjust your dwell and fire holdoff afterward.

[wanna-b-ballin']

last i checked, 9 shims is complete overkill. it should be around 3 or 4 shims shouldn't it?

[NinjaoftheNight79]

My LVL 10 came pre-tuned and has 2 shims. Why would you put 9 in there?

[snoopay700]

My LVL 10 came pre-tuned and has 2 shims. Why would you put 9 in there?

If you'll notice he was talking about the ULT, but anywho, yeah, 9 shims is way too many.

[Cow hunter]

9 is meant for the full auto mod...... and the valve hitting thing..... that happens to me..... tune the LVL X a bit more specifically

[wanna-b-ballin']

tune the LVL X a bit more specifically

you mean ULT?

[Resurection]

OK, in a desperate attempt to get the thread back on track - I am talking about the ULT (TRIGGER-On/Off) and not the Level 10. This is a devilmag put tegether by Devilsden. I do not HAVE a level 10 on this gun, I have eyes.

So, I think I got my answer in there somewhere: if there are too many shims in the ULT then runaway and valve smack-firing are likely. Thank you. I will pull a shim out and let you know. :)

[blitzmercenary]

sorry to get off topic, but full auto mod? help me please!

[Tunaman]

Dave. I did take one out but I thought you should feel it like that before taking out more. Maybe its a little TOO radical.

[Resurection]

Dave. I did take one out but I thought you should feel it like that before taking out more. Maybe its a little TOO radical.

Well to be honest, its fun as hell. However, a little too much for general rec ball with the kids.

[Resurection]

Revival...

ULT won't tighten down?

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I decided to remove a shim or two from my ULT because the DMag has this funky problem sometimes about running away. I put the gun into smooth ramp and a few pulls and the gun goes full auto. I can also smack the back of the valve and the gun will fire.

So I pull the valve, pop the ULT and remove a shim. I begin to screw the top of the on/off back on and it actually spins. It is on, but it isn't tight. I can pull the top of the on/off and see where about 4 more shims could fit.

Is this normal?

[Asym]

ULT won't tighten down?

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I decided to remove a shim or two from my ULT because the DMag has this funky problem sometimes about running away. I put the gun into smooth ramp and a few pulls and the gun goes full auto. I can also smack the back of the valve and the gun will fire.

So I pull the valve, pop the ULT and remove a shim. I begin to screw the top of the on/off back on and it actually spins. It is on, but it isn't tight. I can pull the top of the on/off and see where about 4 more shims could fit.

Is this normal?

Yes. The ULT top piece only has a few threads, if you use a lot of shims it tightens down and holds the shims tight. If you don't need many shims it screws on then drops down after its past its couple of threads and when installed into the valve will compress to that size. The threads just keep the on/off from coming apart during removal so you won't loose shims.

Gently tug the top and bottom of the on/off apart, if it doesn't come apart without unscrewing it its working fine.

Did you test that smack on the back of the gun aired up with no power to the electronics to eleminate a micro switch problem?