OK, I didn't see the external supply, but at 12 volts the motor will turn slower then normal, the standard Diseqc H to H motor uses the LNB power/ transponder switching voltage (13V/18V) supplied by the satellite receiver to run on, and most need around 180 to 200 mA of DC current when running, the startup current is even higher. (up to 350 mA).....
Currently the receivers
no longer have power regulators, have converters, give them 12v and give what you want.
With 12Vcc, they have no trouble giving 14V/18 Volts and 500mAmp.
In general the motors (SG2100 / Dimo120 +) have peaks of 450mAmp., Then it has a stable consumption of 350mAmp.
With coax low loss, the live is 1'13mm, even 1'33mm (a game bought years ago), without problems 60metros/83metros, some equipment allow to increase 1 Volt to compensate for long rolls of coax.
A regulator (LM317) needs 21-22Volts to work at 18V.
Dissipating in heat the volts it does not give,
it literally burns the heatsink to 14Volts when
moving the motor.
A converter, transforms by switching the input volts to whatever you want with a performance of
80-90%,
with 500mAmp is cold, only soldered the body to the plate/PCB, when they remove
3Amp (3000mAmp.) needs heatsink.
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Actualmente los receptores ya
no tienen reguladores de alimentacion, tienen convertidores, les das 12v y dan lo que quieras.
Con 12Vcc, no tienen problemas para dar 14V/18 Voltios y 500mAmp.
En general los motores (SG2100/Dimo120+) tienen picos de 450mAmp., luego tiene un consumo estable de 350mAmp.
Con cable coaxial de bajas perdidas, el vivo es de 1'13mm, incluso 1'33mm (una partida que compre hace años), sin problemas 60metros/83metros, algunos equipos permiten subir 1 Voltio para compensar tiradas largas de cable coaxial.
Un regulador (LM317) necesita 21-22Voltios para trabajar a 18V.
Disipando en calor los voltios que no da,
literalmente quema el disipador a 14Voltios al
mover el motor.
Un convertidor, transforma por conmutacion los voltios de entrada a lo que quieras con un rendimiento del
80-90%, con 500mAmp esta frio, solo soldado el cuerpo a la placa/PCB, cuando sacan
3Amp (3000mAmp.) necesita disipador.