lpr recharge rate

[rafka]

I have my lpr set at about 42 (using 1 shim and checking with the angel lpr gauge). When i shoot, the gauge goes down to about 5 psi but recharges at about 40 for each shot. The needle on the gauge never reaches 0 but I just want to make sure. I'm checking this with eyes off mode, dwell at 2 lights, TR 1 light, hopper at 4 lights (should it be 3 lights for halo B?).

I'm just wondering if the low point of the lpr pressure while it recharges between each shot is too low.

[El Pirata]

Since the gauge is not liquid filled your readings are not going to be the most accurate. Are you saying it drops from 42 - 37 - 32 - 27 - etc... or it just drops to 40 and stops dropping from there.

[snoop]

dont worry about it.. the gauge isn't accurate fast enough to tell.. if u shoot once and let it sit for a second it will go back to 42.. when u shoot like bam bam bam bam .. it will swing back n forth somewhere in between depending on how fast ur shooting

[Sparco]

The gauge is a pretty good estimate, it's not bad. Yes, when you cycle the marker it should drop to zero and bounce right back up to the preset LPR pressure. The reason it's dropping is because you're draining the LPR chamber after shot and it's then refilling. This happens so quickly that you'll probably never see it sit @ zero but you'll certainly see the needle drop down.

A good LPR should snap back to the preset pressure and stay there, it shouldn't creep past it or up to it.

[snoop]

true.. but if ur shooting a string of shots fast enough... the gauge wont show it go all the way back to the top.. because the lpr is faster .. much faster than the gauge

[rafka]

Yeah, every time I shoot, I see the needle go from ~40 to 5 then right back to ~40 but it's the fact that it drops so far that I was concerned about the recharge rate.

The gauge being inaccurate due to not being filled wih liquid, I didn't know about that.

Another question, what loader setting is good with a Halo B (with no board upgrade)?

PS: to answer El pirata's question, my lpr psi reading go from 42-40-40-40 it's just that between every reading, the gauge dropped to ~5 psi.

[snoop]

i got mine on 3.. (hopper setting) and i got a stock halob

[El Pirata]

The point I was trying to make is that with non liquid filled gauges the vibration of firing causes the needle to vibrate giving not as accurate readings. Liquid filled gauges will dampen the vibration to almost nothing. The pro of having a a non liquid filled gauge is you get faster response from the gauge showing changes rapidly which ends up being a con for liquid filled gauges. The pro for liquid filled gauges is they show the constant pressure you are getting as well as lasting longer as the vibration is dampened by the liquid.

Sparco, I am not saying you are wrong but firing a shot or several shots will not use up all the air in your lpr if it does you will end up having shootdown issues and inconsistant velocities. This is why people will run volumizers to keep an air reservoir which keeps a larger quantity on hand. A volumizer if really needed for recharge problems will not stop shootdown or inconsistant velocities over prolonged firing such as firing an entire hopper.

If there was a way to check the velocity without stopping or slowing the rof for each and every shot if there was a recharge problem you could see this by doing that. The amount of air used per shot based only on the lpr is the cubic capacity of the valve in the solenoid x2 (once for forward ram motion and once for rear ram motion).

[rafka]

so el pirata, is my 05 speed ok then if the needle never reaches 0 or is it too close if it goes to ~5?

[El Pirata]

Never reaching zero is a good thing. Dropping 5 - 10psi is normal and it should recharge nearly instantly.

[Bigal1]

Pressure gauges read STATIC pressure only. When you fire the marker, you impose a transient inside the marker that results in both static and dynamic pressures. The gauge will never measure dynamic pressure.

It doesn't appear to me that anything is wrong with your marker based on what you've described.

[rafka]

i feel a lot more secure now. thanks for all the help.