Although we never hooked our CIMs up to a dynamometer, the no-load speed was the same before and after we removed and replaced the motor cans (before any metal was removed). We did see that tweaking the motor cans during reassembly can significantly alter the timing (you could both see this with the tach and hear it), so I am wondering if what Dr. Joe saw was simply a misalignment problem. Even he didn't have a real explanation as to
why removing the can is bad, only:
Quote:
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don't take the armature out of the magnets -- again I have REAL DATA to show that you can lose as much as 10% of the output of the motor by simply taking the armature out of the housing and putting it back in again -- it is a magnitism thing I have been told
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Frankly, I have a hard time believing that there is some magic voodoo in the way the factory installs the armature (other than being careful to prevent metal shavings from sticking to the magnets or making sure the armature is balanced). If someone can provide an actual explanation as to why removing the motor can can reduce power by the 10%-20% that has been stated on these boards, I would gladly admit that I am wrong, but I haven't seen one yet.