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    Re: Asymmetry in i.c.
    From: Greg Rudzinski
    Date: 2019 Jun 8, 04:28 -0700

    Igor,

    You have o.2' of index error on the arc if + is on the arc and minus off the arc. Be careful when reading the micrometer drum minutes off the arc. Right now the semi diameter is about 15.8' so a full diameter will be 31.6'. Your reading on the micrometer drum should be close to 31.6' on the arc and then 28.4' off the arc (60' - 31.6') for zero index error. Not a good idea to just use the on the arc measurement. 

    Greg Rudzinski 

       
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