Re: [ATM] help required

[Adam Krause <krausea34@yahoo.com>]

Vladimir,
Would driving the gearbox with a belt and pulley system get rid of the vibration?  You could put the motor on a totally different table.
Good luck,
Adam Krause

----- Original Message ----
From: Vladimir Galogaza <vladimir.galogaza1@zg.t-com.hr>
To: interferometry@yahoogroups.com
Cc: ATM List <atm@atmlist.net>
Sent: Wednesday, May 21, 2008 5:16:09 AM
Subject: [ATM] help required

To speed up interferogram collection in Phase Shift Interferometry
Bath interferometer, (PSI Bath), I am using a motor to rotate a final
polarizer. Goal is to rotate a polarizer at 5 rpm.
Therefore motors I used have some gear boxes to reduce the speed
of the output shaft.
But motors rotate at high speed and any imbalance in rotor caused vibration
is sensed by interferometer. Motors that have inherently low speed are not available
(to me at least). Stepper motors will do in principle but stepping jerks are
terrible. I have mounted motors to dumping cushions but interferometer is
very sensitive and isolation was always insufficient.
Does anybody has idea how to solve this problem? I count on ATM ingenuity.
( and traditional sense for low $$$ solutions).

Regards
Vladimir.
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