Archived posting to the Leica Users Group, 1999/04/24

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Subject: Re: [Leica] Re: Testing & manufacturing techniques at Solms
From: DonjR43198@aol.com
Date: Sat, 24 Apr 1999 11:23:37 EDT

>Snip: So now I don't understand why there are so many R8 problems, M6
pressure plate, shutter, RF alignment problems, and lenses with loose
elements??? So is this all happening "after" they leave Solms?

Very interesting!  The next logical question is whether the "bean counters" 
have had manufacturing go through the camera and lenses and reduce quality on 
each and every part as low as possible (thus saving manufacturing costs and 
increasing profits) without catching the attention of too many potential 
customers?  The prime example is the M-6 pressure plate problem that a number 
of Leica owners have reported.  The pressure plate in my M-6 is so poorly 
finished that the difference between the surface finish on it and the surface 
finish on the M-3 pressure plates is apparent to the eye.  It is doubtful the 
"new" pressure plate just skipped by quality control but was purposely 
manufactured to lower standards with the hope it "would do."  The next 
logical question is how many other CRITICAL parts have the "bean counters" 
cheapened down with the hope the customer will not notice?

It has been this writer's experience the old M cameras were so well 
engineered and their parts manufactured to such high standards, the problems 
now being reported just did not occur. 

The next logical question is whether anyone has compared the earlier 
manufacturing tolerances with the present day tolerances?  Any manufacturing 
facility that produces a product maintains a book of manufacturing tolerances 
that will enable the facility to refer to those tolerances as often as 
necessary to maintain the quality of its product.  Unless Leica Germany has 
burned the earlier books, it should be an easy thing to check manufacturing 
tolerances over the years.  

Another myth is that the installation and use of CNC equipment results in 
superior parts.  Merely because a plant has installed CNC (Computer Numerical 
Control) equipment does not necessarily mean part tolerances are being held 
to tighter standards than those standards of years ago.  Depending upon the 
quality of the CNC equipment, the potential for better work off the machine 
is possible but not guaranteed.  Especially is this true if the manufacturer 
is not trying to equal or surpass yesterday's tolerance but only wishes to 
increase the speed of production.  

It would be interesting reading, indeed, if Leica Germany would publish 
tolerances from the 60's and present day so they might be compared. 

The writer also noted concern with loose lens elements.  Could it be that 
Leica has reduced lens body costs through the substitution of numerous small 
screws to hold the lens together versus the old method of locking the pieces 
together with heavy duty lock rings? 

From current tests, the Leica glass does appear to be superior but from 
reports that are appearing on the LUG, the lens mounts are not as robust and 
reliable as in past years.

At one time there were very knowledgeable Leica users who had followed Leica 
so closely they could provide answers to the quality questions now being 
raised by numerous Leica users.  Perhaps they could enlighten us.