Re: ATM servo vs stepper motors

["Antonio de Ugarte" <ugarte@retemail.es>]

Does this mean that if I use a servo motor I would not need to buy encoders?

 

----- Original Message -----

From: Stan Kohut

To: Antonio de Ugarte

Cc: atm LIST

Sent: Wednesday, June 06, 2001 1:43 AM

Subject: Re: ATM servo vs stepper motors

A stepper motor moves in steps, normaly around 1/8 of a degree.

it has multiple windings that are controlled to move the stepper to an exact position.

The ones I use have 6 wires.

The servo motors are simply a dc motor with a opticle encoder.

The electronics read the encoder and controll the dc motor.

For a real explanation you need to check out mells site:

http://zebu.uoregon.edu/~mbartels/altaz/altaz.html

Hope this helps

Stan                                             http://www.geocities.com/natsp2000/index.html

 

Can anybody explain me what is the difference in the way stepper and a servo motor  works.

When should I use one or another for telescope control. Is one more complex to control than the other?