ESC-BLDC motor wont work/arm with different power supply

Other Hardware General Electronics
1

Hey you guys,
i am a noob and i got a question.
I am running a brushless dc motor with its esc, powered by a computer psu (12v). I can steer the motor's rpm with a potentiometer and an arduino uno, the code was adapted from the interwebs. Everything works fine.
I updated to a more powerful power supply today (also 12v), but this one simply doesnt work. The esc gives me the initial 3 beep sounds, but instead of continuing with 2 more beep sounds like it did with the old psu, it just starts to beep at ~2 sec intervals. I tried everything i could find in regards of arming the esc (starting with max throttle etc), but nothing results in any kind of reaction, it just continues to beep.

If i plug the system into the old psu, everything just works perfectly again.

Here are the specs from my rig:
Motor: A2212 KV1000

ESC: No clue, prolly super low quality, came in a plastic bag without any manual or serial code. came with the motor

PSU (old pc): a random computer psu with max 18 amps on the 12 v rail

new PSU: https://smile.amazon.de/gp/product/B07GZTF6HZ/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&th=1

Code:

#include <Servo.h>

Servo esc;
int FanSpeed;

void setup() {
esc.attach(3, 1000,2000);
Serial.begin(9600);

}

void loop() {
FanSpeed=analogRead(A0);
FanSpeed=map(FanSpeed, 0, 1023, 0, 180);
esc.write(FanSpeed);
Serial.print(FanSpeed);
}

maybe someone of you can help me.
Love you guys:)

2

3 beeps typically means that the ESC sees power in an appropriate range to be a 3 cell LiPo battery.

The difference in the beeps after that could be that the ESC is going in to programming mode, or simply not seeing a valid servo signal on the throttle input.

Can you snap a pic of your project and post it here? First thing I want to check is grounds. Do you have a ground from the arduino to the ESC servo input?

3

Have you tried controlling the ESC with a servo tester but using your new power supply in place of the
standard LIPO battery pack ?
This would rule out power supply voltage issues.
You identify your power supplies as 12V but have not posted any voltage measurements.
Are you RC qualified or are you a noobie with that as well ?

The reason I ask is that any RC qualified person would simply read the programming sheet for the ESC
to find out what the beeps code is. You have not indicated that you did that which makes me wonder how
much exactly do you know about RC ?