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Old 11-27-2011, 10:11 PM #1
Lurker27
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Official LurkerPB AXE / Mini Eigenbolt Info Thread

Consolidating information into one place since the other thread is quite problematic to navigate.

We now offer a combination deal with our eigenbarrel and lube, on the website.


Old Thread: http://www.pbnation.com/showthread.php?t=3399915

How it works/features:

In addition to being constructed from lightweight delrin, the Eigenbolt features a unique 2 stage force activation system that allows only 25% of the pressure to be placed on the ball. This creates a gentle environment for paint, while allowing the full flow from the solenoid to reach the bolt for crisp cycling speeds.

In addition, the Eigenbolt has had the soft face improved by adding an air gap for the ball to compress into, and has a unique internal taper to smoothly guide the air to the ball, rather than the rough step of the stock and other aftermarket bolts.

Manual:http://www.lurkerpb.com/manuals/minimanual.pdf

Detailed install guide (Thanks to IlovepieNcake!): http://www.pbnation.com/showthread.p...1#post67735911

Awesome Install Vid:
http://www.youtube.com/watch?v=hQL2N...ature=youtu.be

Ball pinch demonstration:

FAQ:
Quote:
Q: I broke/lost the internal spacer o-ring, what size is it?
A: The best easily found replacement option is an 015 polyurethane ring - the same as a tank o-ring. We include a 014 90 durometer stock, but these can sometimes be difficult to find.

Quote:
Q: What is the best spring/kit to use with the Lurker Eigenbolt?
A: The STOCK spring works best - it prevents the bolt from slamming forward with too much force, and the kick-back is totally mitigated by the air bumpering system installed with the spacer.


Testimonials:

http://www.pbnation.com/showthread.p...3#post70503853
http://www.pbnation.com/showthread.p...2#post67402562
http://www.pbnation.com/showthread.p...6#post69898586
http://www.pbnation.com/showthread.p...7#post69253297
http://www.pbnation.com/showthread.p...1#post70476641
http://www.pbnation.com/showthread.php?t=3442747
http://www.pbnation.com/showthread.p...1#post67028181
http://www.pbnation.com/showthread.p...7#post67502937
(Test results below)
http://www.pbnation.com/showthread.p...1#post67866071
http://www.pbnation.com/showthread.p...4#post67870874
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Last edited by Lurker27 : 07-23-2012 at 08:26 PM.
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Old 11-28-2011, 01:59 AM #2
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awesome! I'm ordering one next week sometime.
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Old 05-26-2012, 11:47 AM #3
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Bump because this is the proper place, but also because I updated the manual with guide polishing + poppet mods (short steps)
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Old 05-26-2012, 11:58 AM #4
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Awesome idea. Sticky!
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Old 05-26-2012, 02:35 PM #5
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Awesome instal guide and eigenbolt info! If you ask me the biggest thing keeping people from buying your bolt is they hear it's "difficult to instal", so they get worried and don't even try it. I think once people realize how simple it is to remove the stock bumper oring, then slide a spacer onto the bolt guide, you'll have more people wanting to use it.

I wanted to tune my eigenbolt for mostly efficiency to see how it shoots. The air bumper that is created when the bolt is at the end of it's return stroke and traps air in the bolt sail and spacer really smooths the shot out, and this is using the stock spring! Just picture it in your head, what would create less recoil, a bolt resetting quickly and smashing into a hard oring, or a bolt resetting that hits a pillow of air that slowly stops it? You can actually hear the air cushion while the gun cycles, right after the puff of air for the ball you'll hear a little "chud" sound, showing that a seal with the spacer is good. When I used a smaller 015 on the outside of the spacer, the sound went away, since the seal wasn't tight. You can also hear when the bolt isn't working properly, if the bolt makes a loud "click" sound at the end of it's stroke, then the spacer must be de-seating and traveling on the guide with the bolt. This will also usually be accompanied by the bolt sticking in the breech during cycling, and slower movement during cycling.

Right now my setting are:

OP: 160psi
open dwell: 4.5ms
closing dwell: 5ms
back cap: 1 and an 1/8th turns out
velocity: 285fps +/- 2

Super smooth cycling with those settings, plus with the backcap sweet spotted at a hair over 1 turn, it's efficiency is notably higher than with the backcap at 1.5 turns out and higher. I have a virtue rotor board with rf kit on it's way to me, since the seed kit was discontinued virtue board with rf is the only way to have auto-unjam with the rotor. Whenever I get the odd jam my unjam arm does nothing, lol. With the rf kit I'll actually be able to see how fast this bolt cycles, since my stock rotor maxed out at 22 bps.
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Old 05-26-2012, 02:45 PM #6
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Originally Posted by Teahouser View Post
with the backcap sweet spotted at a hair over 1 turn, it's efficiency is notably higher than with the backcap at 1.5 turns out and higher.
Interesting point! I've been running 1.5 turns for a while now, but I may start messing with it a bit more tomorrow when I go to the field. Since I shoot a 50ci tank, efficiency is a bit more important.
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Old 05-26-2012, 03:11 PM #7
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Quote:
Originally Posted by SNAKESNIPER View Post
Awesome idea. Sticky!
Lurker's a mod, he can sticky it himself

Great idea for a great bolt. I will definitely be ordering one of these soon...
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Old 05-26-2012, 03:20 PM #8
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Quote:
Originally Posted by SNAKESNIPER View Post
Interesting point! I've been running 1.5 turns for a while now, but I may start messing with it a bit more tomorrow when I go to the field. Since I shoot a 50ci tank, efficiency is a bit more important.
Most people think that a low dwell = high efficiency, now while a low dwell will indeed increase efficiency, how open the back cap is plays the biggest role. It controls how far the poppet can open, thus how much air can escape to propel the ball. Just like if you have the back cap all the way in hardly any air escapes. Even just half a turn of the back cap can lead to an extra hopper of balls from a 68/4500 fill. Having it screwed in farther also puts more tension on the poppet spring, leading to it resetting the poppet slightly quicker.

Also a note: I used Boss' infamous bolt and it worked great! Awesome bolt, but I liked the gentleness and sound signature of lurker's bolt more. So since lurker's bolt reaches the vent holes in the bolt guide faster because of the cut out bolt sail, I added boss' bolt spacer and oring, so it would limit how far lurker's bolt would travel, making it stop right after moving past the vent holes. Obviously this also added a bumper for the bolts forward motion, combined with the air cushion on the return stroke, I've created a hybrid bolt with maximum smoothness The spacer also changed where my back cap sweet spotted, from 1.5 turns out to a little over 1 turn. This allowed me to keep the same velocity, but with a more efficient back cap setting. Very happy with my current set up.
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Old 05-26-2012, 03:26 PM #9
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Originally Posted by incognito-z View Post
Lurker's a mod, he can sticky it himself

Great idea for a great bolt. I will definitely be ordering one of these soon...
He probably doesn't want to sticky this as he is a mod, and sticking a thread about his own product is unfair to the other bolt companies out there.

But I remember someone who made a thread about axe/mini upgrades that got sticked...he could probably link this to the bolt section
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Old 05-26-2012, 04:25 PM #10
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Edited: Fixed the problem.

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Old 05-26-2012, 05:46 PM #11
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Quote:
Originally Posted by Teahouser View Post
He probably doesn't want to sticky this as he is a mod, and sticking a thread about his own product is unfair to the other bolt companies out there.

But I remember someone who made a thread about axe/mini upgrades that got sticked...he could probably link this to the bolt section
Hahaha I'll link it now.

EDIT: It has been linked along with a new section about thumb screws.
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Last edited by incognito-z : 05-26-2012 at 05:59 PM.
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Old 05-27-2012, 08:49 PM #12
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Quote:
Originally Posted by Teahouser View Post
Also a note: I used Boss' infamous bolt and it worked great! Awesome bolt, but I liked the gentleness and sound signature of lurker's bolt more. So since lurker's bolt reaches the vent holes in the bolt guide faster because of the cut out bolt sail, I added boss' bolt spacer and oring, so it would limit how far lurker's bolt would travel, making it stop right after moving past the vent holes. Obviously this also added a bumper for the bolts forward motion, combined with the air cushion on the return stroke, I've created a hybrid bolt with maximum smoothness The spacer also changed where my back cap sweet spotted, from 1.5 turns out to a little over 1 turn. This allowed me to keep the same velocity, but with a more efficient back cap setting. Very happy with my current set up.
Update: I tried This setup^^^ today, and it was insanely smooth. 160PSI felt like 120ish. Unreal.
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Old 05-31-2012, 10:20 PM #13
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Quote:
Originally Posted by Lurker27
Bump because this is the proper place, but also because I updated the manual with guide polishing + poppet mods (short steps)
Well I've decided my first mini is gonna full of Lurkers stuff.

I have to ask...why is it called Eigenbolt and Eigenbarrel?

What is Eigen? Engine?

Am I missing something?
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Old 05-31-2012, 10:22 PM #14
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http://en.wikipedia.org/wiki/Eigen
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Old 05-31-2012, 10:26 PM #15
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Hmph I am such a smart one. Thanks for at least not "googling it for me". Hah.

Still not 100% what it has to do with a paintball bolt but ok.

Maybe the eigenvectors?

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Old 05-31-2012, 10:38 PM #16
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Yeah, I was thinking the math one too

Maybe Lurker27 can shed some light.
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Old 05-31-2012, 10:42 PM #17
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Yeah, I was thinking the math one too

Maybe Lurker27 can shed some light.
I'm sure Lurker choose the physics/mathematics meaning since I believe he's an engineer? So he'd deal with eigenvectors/values in his school and work.
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Old 05-31-2012, 11:18 PM #18
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Quote:
Originally Posted by Teahouser

I'm sure Lurker choose the physics/mathematics meaning since I believe he's an engineer? So he'd deal with eigenvectors/values in his school and work.
I thought it was a dumb question! I'm glad it wasn't. I'm an engineer too so I am familiar with vectors.
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Old 06-01-2012, 12:22 AM #19
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... I come here as a respite from studying for my Geometry Honors final, only to find math words. It hurts

I always thought it was just a word that sounded cool and unique.
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Old 06-01-2012, 01:15 AM #20
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It was a math joke about making an intimidator shoot like a matrix, originally
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Old 06-01-2012, 07:20 AM #21
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It was a math joke about making an intimidator shoot like a matrix, originally
Am I the only one that has brought up such a question? I feel as if I am hah.\

I thought it may be something to do with the German physicist named Eigen. He did some studies on extremely fast chemical reactions. Haha thought that may of had something to do with it.
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