"Serge Auckland" wrote in message
...
loads snipped

Does your lift mechanism slide up and down or is only able
to rotate at the top of the travel?


The lift mechanism should rotate all the way round on a screw-thread, so
you can adjust it for height by one thread per revolution. You will,
however, have to raise the arm as much as you can out of the base to do
this. If it's just touching, then one turn should do it. For safety, I
would remove the counterweight assembly and the arm tube before doing
this.

Actually, you will have to remove the counterweight assembly so that the
lift mechanism can go round as otherwise it will foul the weights. Still
remove the arm tube for safety though.

S.
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