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spikeddem
Jun 5, 2009, 11:40 PM
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I ran mine through a few days ago, but wanted to remind myself what the result were. I figured I'd take some screenshots and add some more poop to the kiddie pool.
All are done using the automatic point grabber, except the gold link cam, which as you can gather from the picture had its axle used as the center point (read other notes below about it).
Blue Alien
Green Alien
Yellow Alien
Grey Alien
Red Alien
Red Link Cam
Link cams have a constant camming angle of 13.5, which is not available with the CAM Profile Tester. I used the Metolius angle of 13.25 and edited points. It looks a bit off, but it's not surprising at all considering I used edited points, so the points are fixed and the theoretical center point is not.
These two link cam results are more for entertainment than for any data since their camming angle isn't in the program.
Gold Link Cam
As mentioned previously, the program does not have the proper camming angle, so the approximate Metolius equivalent was used (13.25 vs. 13.5). This one, unlike the red link cam, has its center point manually selected and fixed. The theoretical spiral matches well with the actual spiral, and it's well possible that the discrepancy is a result of the camming angle.
Results:
1 out of 5 aliens has correctly drilled axle holes. The green alien seems to be the only one, although others are close. On the other hand . . . CLOSE = WTF GET YOUR SHIT TOGETHER.
(This post was edited by spikeddem on Jun 5, 2009, 11:56 PM)
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curt
Jun 6, 2009, 12:25 AM
Post #27 of 130
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spikeddem wrote: ..1 out of 5 aliens has correctly drilled axle holes. The green alien seems to be the only one, although others are close. On the other hand . . . CLOSE = WTF GET YOUR SHIT TOGETHER.
I think you're being far too kind. Most of those Alien axle holes are off center by quite a significant amount. If it were just a few thousandths of an inch, perhaps it would be no big deal, but those holes are off far enough that you no longer have anything like a constant expansion rate.
Curt
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spikeddem
Jun 6, 2009, 12:32 AM
Post #28 of 130
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curt wrote: spikeddem wrote: ..1 out of 5 aliens has correctly drilled axle holes. The green alien seems to be the only one, although others are close. On the other hand . . . CLOSE = WTF GET YOUR SHIT TOGETHER. I think you're being far too kind. Most of those Alien axle holes are off center by quite a significant amount. If it were just a few thousandths of an inch, perhaps it would be no big deal, but those holes are off far enough that you no longer have anything like a constant expansion rate. Curt
I initially hadn't included the "although, others are close . . ." but then decided to add it. Looks like my sarcasm was lost in the tubes. Sorry about that. 
To be sure, I agree that the discrepancies are ludicrous.
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adatesman
Jun 6, 2009, 2:05 AM
Post #29 of 130
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cracklover
Jun 7, 2009, 3:19 AM
Post #30 of 130
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I just ran all mine through the software. Most are off by a little. A few are off by a lot (black and one of the reds), and one is perfect (grey).
black
blue #1
Blue #2
Green #1
Green #2
Yellow #1
Yellow #2
Yellow #3
Grey #1
Red #1
Red #2
And I checked how bad the angles were on the Black and that last Red. On the black when it's not very contracted, and on the red when it is very contracted, the angle is nearly 30 degrees! I'm not climbing on those sucker any more!
Black angles
Red angles
What a bummer.
GO
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healyje
Jun 7, 2009, 7:31 AM
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Not sure I'd characterize most of those as 'off by a little' - most look to be substantially off. Bummer indeed.
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basilisk
Jun 7, 2009, 10:17 PM
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I just went to EMS to kill some gift certificates yesterday. Was planning on getting Aliens until I remembered this thread. Haven't gotten proper pictures of the ones I have yet, so I don't wanna mess with it. Bleh.
Ended up buying a titanium kettle and some fuel instead.
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rocknice2
Jun 7, 2009, 11:21 PM
Post #34 of 130
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Man, you guys are all misreading the results.
CCH is so brilliant it's beyond everyones understanding.
The simple fact is the hole a off center to compensate for pin scars
   
Edit 4 typo
(This post was edited by rocknice2 on Jun 7, 2009, 11:22 PM)
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bill413
Jun 8, 2009, 12:34 AM
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basilisk wrote: I just went to EMS to kill some gift certificates yesterday. Was planning on getting Aliens until I remembered this thread. Haven't gotten proper pictures of the ones I have yet, so I don't wanna mess with it. Bleh. Ended up buying a titanium kettle and some fuel instead. 
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adatesman
Jun 8, 2009, 1:10 AM
Post #36 of 130
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basilisk
Jun 8, 2009, 2:18 AM
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adatesman wrote: bill413 wrote: basilisk wrote: I just went to EMS to kill some gift certificates yesterday. Was planning on getting Aliens until I remembered this thread. Haven't gotten proper pictures of the ones I have yet, so I don't wanna mess with it. Bleh. Ended up buying a titanium kettle and some fuel instead. Are we going to have Aric pull test the kettle? ....well now I'm a little curious. Well, I do have a freezer full of Nalgenes at the moment, so it wouldn't be that strange a request. |
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adatesman
Jun 8, 2009, 2:24 AM
Post #38 of 130
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basilisk
Jun 8, 2009, 3:11 AM
Post #39 of 130
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heh, guess I cheesetitted the comment. I wrote above you for whatever reason.
I've found the same problem with EMS. The one in Concord, NH seems to get random Aliens now and then, so I typically just stop there on my way north.
Anyway, got proper pictures now. I'll hopefully get them run through the program and take screenshots tomorrow night
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adatesman
Jun 8, 2009, 3:19 AM
Post #40 of 130
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healyje
Jun 8, 2009, 8:12 AM
Post #41 of 130
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cracklover wrote: healyje wrote: Not sure I'd characterize most of those as 'off by a little' - most look to be substantially off. Bummer indeed. Depends on your definition. Certainly most are off by only a millimeter or two. That's a very small difference in space. But what's interesting (and where I agree with you) is what a big difference in the angles that small spacial difference makes.
That's the issue - 'off by a little' when little is more than a millimeter and you now have cam angles gone wild, and those oh so very specific cam angles are the only reason we're using the damn things.
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rightarmbad
Jun 8, 2009, 11:40 AM
Post #42 of 130
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Will somebody try running the same cam again with a different photo to see how consistent the results stack up?
Looks to me like a photo could tell a thousand lies...
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healyje
Jun 8, 2009, 1:24 PM
Post #43 of 130
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rightarmbad wrote: Will somebody try running the same cam again with a different photo to see how consistent the results stack up? Looks to me like a photo could tell a thousand lies...
Forget the program, ignore all the drawn lines, just look at the axle hole locations in the two red cams above with your own eyes - what do you see?
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adatesman
Jun 8, 2009, 1:41 PM
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j_ung
Jun 8, 2009, 1:51 PM
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Aric, have you run separate lobes from one unit through the program? If so, have you found variations? I'm wondering if individual lobes within one unit will tend to be different from each other.
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GeneralZon
Jun 8, 2009, 1:52 PM
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Aric,
How are these holes being drilled? In a press using a jig? free handed?
I am having a hard time trying to figure out how any of these "mis-drilled" cams got onto the market. Seems to be a blatant disregard for any QA/QC.
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adatesman
Jun 8, 2009, 2:01 PM
Post #48 of 130
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adatesman
Jun 8, 2009, 2:07 PM
Post #49 of 130
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csproul
Jun 8, 2009, 2:10 PM
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Sorry if I missed it, but the Aliens that you examined all seem to be fairly new. Has anyone looked at the drilling on older Aliens (pre-2002 maybe?)?
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yell_1_angles.jpg
