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Search: Posts Made By: jccaclimber
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08-14-22, 09:23 PM
Replies: 28
Views: 842
Posted By jccaclimber

Ok, now the interesting part. 1. My upshift...

Ok, now the interesting part.
1. My upshift (cable release) results were much more consistent than my downshift (cable pull at the shifter) results, so I used those.
2. This is done on a 1st gen...
08-14-22, 09:09 PM
Replies: 28
Views: 842
Posted By jccaclimber

Andy, All valid experiments should be...

Andy,
All valid experiments should be repeatable, so I went ahead and threw something together to try to validate your numbers. It wasn't nearly as robust a setup as my previous measurements...
08-07-22, 10:50 AM
Replies: 28
Views: 842
Posted By jccaclimber

Yes, but cantilevered. Same concept but I was...

Yes, but cantilevered. Same concept but I was trying to imply the plate going through both ends, and the measurement point kept between them.
With many of these, the perpendicular it’s of that...
08-06-22, 10:22 PM
Replies: 28
Views: 842
Posted By jccaclimber

If you screw a flat plate in the place of the...

If you screw a flat plate in the place of the inner cage you should get a decent surface. Don't feel bad making it thicker than the original plate, that just means you'll need longer screws.
08-06-22, 02:17 PM
Replies: 28
Views: 842
Posted By jccaclimber

Yet another “one more note”. I also found more...

Yet another “one more note”. I also found more variability in position than I wanted as I was setting up my experiment, and concluded making sure everything in the shifter was seated would help.
...
08-06-22, 02:08 PM
Replies: 28
Views: 842
Posted By jccaclimber

One more note, it looks like my first pass at...

One more note, it looks like my first pass at determining cable pull per shift was repeatable within +/- 0.05 mm (0.002") across 5 runs. The instrument I was using has sub micron repeatability, so...
08-06-22, 01:29 PM
Replies: 28
Views: 842
Posted By jccaclimber

Just yesterday I approved a PPAP for a high...

Just yesterday I approved a PPAP for a high volume part with a Cpk > 5 on a 0.008 mm wide tolerance band. Admittedly that's the highest Cpk I've actually seen in the wild, but if you understand the...
08-06-22, 11:57 AM
Replies: 28
Views: 842
Posted By jccaclimber

While you’re at it you might as well reject the...

While you’re at it you might as well reject the results for not using instrumentation with a current NIST traceable calibration and operating in a temperature and humidity controlled environment.
08-05-22, 10:42 PM
Replies: 28
Views: 842
Posted By jccaclimber

I'll have to find the data, but I did a similar...

I'll have to find the data, but I did a similar thing with Shimano 10sp front shifter. Mostly putting this here as a reminder, it's about time to go back to trying to convert my front shifter from a...
Showing results 1 to 9 of 9


 
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