Äîêóìåíò âçÿò èç êýøà ïîèñêîâîé ìàøèíû. Àäðåñ îðèãèíàëüíîãî äîêóìåíòà : http://www.naic.edu/~phil/turret/turbumps_sep05.html
Äàòà èçìåíåíèÿ: Fri May 6 00:46:56 2011
Äàòà èíäåêñèðîâàíèÿ: Tue Oct 2 07:58:02 2012
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changing rolling surface

Changing the turret rolling surface

12sep05

The turret floor sits on a set of rollers bolted to the feed tower. The rolling surface sits between the bottom of the floor and the rollers. It is made up of 6 (??) sections. The rolling surface has been wearing with time (1/64 of an inch??). On 06sep05 one of these sections was replaced (the section opposite to alfa). On 12sep05 the tilt sensor mounted on the turret floor were used to check for any bumps in the floor caused by the height difference between the new and old sections. The plot shows the roll of the turret floor during a turret spin (.ps) (.pdf) from 26 to 340 degrees and back (roll is in the direction of rotation). The dome was at az=270, za=10 when the spin was done.

The 360 period term comes from the floor not being level at za=10 (it is level closer to za=9.8).
The black curve was when the floor moved 26-340 degrees. The red curve was when it returned in the opposite direction.
There are bumps at tur=50.6 and 90.6 .These repeated in the clockwise and counterclockwise directions. They are spaced by 40 degrees. If there were 6 sections of rolling surface you might expect this spacing to be 60 degrees (or some beat of the 60 degree spacing and the spacing of the fixed rollers). These bump may have been here prior to the replacement of the rolling surface section.

processing: x101/050912/turretwght.pro

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