NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: h.a.c. van Asten
Date: 2012 Feb 11, 10:07 -0800
The micrometer mechanism contains very precise , no backlash , under 90 degrees cogs , the very slightest pollution by dust , oil remains etcetera , immediately leads to a block , mostly for a part of the circumference only . Open case thoroughly , remove any stain from wheels by soft material (no screwdriver , knife or other) and solvent . As long as running the axis gives the impression that it is crooked , wheel is not clean enough . Disassembling (sharp screwdrivers , matching sizes) can be safely done , no calibration of mirrors etc. will get injured . Oil running surfaces very lightly before re-assembling , do not use grease , it will sharply obstruct easiness of running the scales . hva .
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