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Old 02-14-2012, 11:43 PM #253
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That would work just fine - you may lose a tiny bit of travel on the ring, but I can't imagine that's a significant volume sweep. Good call.
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Old 02-14-2012, 11:51 PM #254
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Quote:
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That would work just fine - you may lose a tiny bit of travel on the ring, but I can't imagine that's a significant volume sweep. Good call.
Lurker what about designing a rubber stop ring of some sort or even a rubber seal inside the Eigen Ring itself.
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Old 02-15-2012, 03:45 AM #255
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Just throwing it out there, given the confusion about o-rings on the DM9+ version and the tight fit in the space, could the ring be made from delrin? Perhaps as an option, or add a delrin one to give the choice for a few dollars more? It would reduce worries about scratching, pinging, lubricity and the need for o-rings. If this has already been considered and binned then move along, nothing to see here
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Old 02-15-2012, 09:39 AM #256
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I actually had previously considered going the other way, with brass for the added mass for more of the recoil canceling effect - it was much more pronounced when using a steel spring behind the ring (though the efficiency was markedly worse). I'll look at some options - If anything gets done it will be a free upgrade.
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Old 02-15-2012, 11:43 AM #257
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Old 02-15-2012, 05:09 PM #258
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Quote:
Originally Posted by Lurker27 View Post
I actually had previously considered going the other way, with brass for the added mass for more of the recoil canceling effect - it was much more pronounced when using a steel spring behind the ring (though the efficiency was markedly worse). I'll look at some options - If anything gets done it will be a free upgrade.
Well brass is still magic so here's hoping. Now we just need a brass Eigenbarrel...
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Old 02-15-2012, 08:48 PM #259
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Anything in the works for the DM12?
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Old 02-15-2012, 09:08 PM #260
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Yep - it looks like the DM12 may even use the original eigenring with the stop relocated to the outer can/sleeve
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Old 02-15-2012, 11:45 PM #261
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Yep - it looks like the DM12 may even use the original eigenring with the stop relocated to the outer can/sleeve

I wonder who had that idea

*cough*cough*.. btw did you get my last PM about the threading? It may not be the direction you want to go with final models but will be more than sufficient for prototyping

Also, I'm wondering if some of the issues that people are experiencing are from binding between the sleeve and the bolt.. maybe some kind of sheer twisting.. Perhaps finding a way to secure the rear portion of the sleeve is needed
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Old 02-16-2012, 12:54 AM #262
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Yes sir, It's a great point - And such an easy part to proto, I assume you'll be wanting the tester quite soon
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Old 02-16-2012, 02:18 AM #263
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Yes sir, It's a great point - And such an easy part to proto, I assume you'll be wanting the tester quite soon


Yes please I am willing to pay.. cause I need a couple eigenbarrels too
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Old 02-16-2012, 02:30 AM #264
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DM12 eigenring with clear outer can.. now that would be something!
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Old 02-16-2012, 07:32 AM #265
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Quote:
Originally Posted by FrmrSpecialist View Post
Also, I'm wondering if some of the issues that people are experiencing are from binding between the sleeve and the bolt.. maybe some kind of sheer twisting.. Perhaps finding a way to secure the rear portion of the sleeve is needed
doesnt the sleeve fit along the inside of the body with relatively tight tolerances? If this is true, the sleeve cant twist or deflect.
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Old 02-16-2012, 08:40 AM #266
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DM12 eigenring with clear outer can.. now that would be something!
That's what I plan on doing with mine
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Old 02-16-2012, 08:44 AM #267
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I don't think anything the sleeve does can possibly have any effect on the operation of the bolt itself. As long as it's not easily movable by hand and full abutted against the wall of the can, it should not shift around. If anything, the slight area change and recommendation to run without the metric o-ring around the interior form the largest differences between the DM9-11 and DM8 and lower iterations
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Old 02-16-2012, 12:48 PM #268
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Well I wouldn't think it would affect the bolt... however if the can were to shift... eventhe slightest it would cause the eigenring to bind and in that moment act like a top hat mod... causing some users to have the erratic/poor velocity that they have been seeing..
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Old 02-16-2012, 12:55 PM #269
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I mean it seems that the ones that have the most issues are the 9-11's and that is the only reason I could think that it would happen. Also I don't know how effective the 12 will be since the top hat is stepped.. giving the eigenring less travel... thus less optimized volume
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Old 02-16-2012, 08:39 PM #270
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Quote:
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I mean it seems that the ones that have the most issues are the 9-11's and that is the only reason I could think that it would happen. Also I don't know how effective the 12 will be since the top hat is stepped.. giving the eigenring less travel... thus less optimized volume
I think I am running into this issue...have not noticed any increase in efficiency, but there is no way for me to verify that the eigenring is moving every shot. Just cleaned the can oring of lube to try and get it to sit more solidly and thus not shift causing ring binding. Will need to test it when I go out to play on the 25th.

If anything, I would think the only thing that could completely prevent the can from shifting would be having the can have it's own support on both ends...possibly having a machined-in support on end opposite the current single support with holes to allow the air to pass by (thereby also doubling as the stop ring).
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Old 02-21-2012, 07:33 PM #271
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my 12 has a super smooth shot i cant wait to add the ring to it
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Old 02-23-2012, 12:33 PM #272
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After installing the ring on my pm8, I'm having problems with my bolt sticking forward. Is there something wrong with my settings?

Dwell is at 15
LPR is ~ 2 1/2 turns out

It will cycle fine for ~30 shots, then the bolt will just stick forward.

Also, was I supposed to put an oring on the groove inside the ring itself?
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Old 02-23-2012, 01:03 PM #273
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Quote:
Originally Posted by jonsanchez311
After installing the ring on my pm8, I'm having problems with my bolt sticking forward. Is there something wrong with my settings?

Dwell is at 15
LPR is ~ 2 1/2 turns out

It will cycle fine for ~30 shots, then the bolt will just stick forward.

Also, was I supposed to put an oring on the groove inside the ring itself?
Turn your LPR out another 1/4 or 1/2 turn. That should solve your bolt sticking forward issue.
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