Quote:
Originally Posted by kinetic
You need to make the worm stay centred and with zero
end thrust before you can even hope to quantify a meaningful
PE in arc sec.
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Correct - on closer inspection the ovision block doesn't seem to provide for thrust bearings (unless they have changed their design recently).
I've followed Rainer's advice and have two thrust bearings on each end of the worm assembly behind the radial bearings so there is zero axial play in the block I'm working on.