RE: [CAD_CAM_EDM_DRO] Encoder/Servo question

Bill,
It depends on the gearing of the drive system and where the encoder is
mounted. By choices I mean that the encoder could be mounted on the shaft
of the motor (most typical) or a linear encoder where the encode is attached
to the "end-effector". The latter is much better than rotary but it is also
much more expensive. So this means that the encoder resolution measures the
motor-shaft movement. There is gearing between the motor and the
end-effector. The motor, encoder and gearing need to be chosen to get the
resolution required.

Joe



-----Original Message-----
From: Bill Vance [mailto:ccq@...]
Sent: Friday, July 16, 2004 4:35 AM
To: 2cc@...
Subject: [CAD_CAM_EDM_DRO] Encoder/Servo question

Howdy;

I've noted various references to 1000 and 2000 line encoders, but are there
any servos that will actually turn one or two thousandths of a turn per
step/line?

Bill

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