Thank you for the reply to all. The motor schematic is as follows: +--00000000----+ A 0------! ! +--00000000--+ ! ! ! +-----+ ! ! ! ! 150uF50V =3D=3D=3D ! ! ! ! ! +-------+ ! ! B o-------------------+ ! ! C o---------------------+ =20 =20 48VAC to A-B the movement is CW 48VAC to A-C the movement is CCW The motor speed gives me one turn of the antenna each two minutes. What I need is one turn in 5 minutes. This will give me more precision pointing the antenna, the reduction of the velocity never can be variable, it must be fixed. The rotor is a CDE Ham IV, and has some gears to reduce the motor=B4s velocity. Regards, Augusto -----Mensaje original----- De: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] En nombre de Vasile Surducan Enviado el: Jueves, 14 de Julio de 2005 12:39 p.m. Para: Microcontroller discussion list - Public. Asunto: Re: [OT] How to reduce velocity of AC Motor On 7/14/05, Augusto Yipmantin wrote: > Hi all,=20 >=20 > Maybe this will be a fool question, but I want to know how to reduce the > velocity of a 48VAC little motor used by HAMS to rotate antennas. Well, if it's a little AC motor and a BIG HAM radio antena, then you already have a gear somewhere. Probably is an asynchrounous motor with a squirell type rotor and standard coil stator. Probably not. Better find out and tell us, don't let us scream here... :) cheers up, Vasile 3/4 from my country is under the flood 1/1 from my politicians are corupted >=20 > Regards, >=20 > Augusto =20 >=20 >=20 > --=20 > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist