Power Supply times two

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,

I have several questions.

Q1

if I have 2 power supplys on the breadboard one on one side one on the other how do I connect the gnd from both sides to the arduino.

I have 6 servos and three of them will stall
Stall curent is 2.5 amp

Q2

How do I prevent a servo motor from staling? :sweat_smile:

Q3

If I supply too little amp the motor will behave strangely as I understand it. ?

Thanks in Advance

2

Q1
just run a jumper from one breadboard ground to the other, then Arduino gnd to that.
Q2
provide adequate power supply at the correct voltage. A battery will do. Each servo may need its own voltage regulation depending on the size of the servo. Each servo supply should be able to handle 3 amps for stall current 2.5 on the servo. Also, prevent the servo from stalling by using it within its capability. Chances are you can't winch your car with it, know what I mean?
Q3
Yes. It won't work and you'll overheat your power supply.

3

Breadboards are for low power logic circuits, and the tracks can't handle servo currents -- they burn.

You will need a servo power PCB. Buy one or DIY like these: https://diyodemag.com/projects/servo_power

How do I prevent a servo motor from staling?

You can't, of course, but the servo also briefly draws the "stall current" every time it starts moving.

4

if the servo is stalling because it is hitting its endstops you can limit the range that the servo will move by measuring, by experimentation, the actual range of the servo and entering those limits in the min and max position in the attach function.

5

thanks for answering

Would it work with this

Bild
Bild1284×1595 99.8 KB

Do I need two of these if I have two power supplies each with 5 amp to power all 6 servos

6

thanks for answering

Ich habe diesen Aluminium Roboter arm wenn ich ihn austrecke hört man die Motoren wie sie ihre Positionen halten es sind 996 Motoren vielleicht bekommen sie auch nicht genug Strom oder der arm ist zu schwer

7

For MG996R, you need a minimum of 2.5 Amperes per servo. So for three, buy a 7.5 A power supply. For six, 15 A.

Servos briefly draw the stall current every time they start to move.

8

Thanks for answering the servos stall when I fully extend my aluminum robot arm but also in other not too demanding positions maybe they don't get enough current

9

So if i connect the pmw with a 15 amp power supply to the servos and the arduino it should work can you recommend me a power supply

thanks for the help :pray:

10

Is this a more or less stationary robot arm? You could always convert a PC power supply and pick off all the power you need from the 5 volt lines.

11

Thaths way too complex for me hahah is there a solution can i use a lab power supply ?

12

Converting one is actually really easy. Tons of tutorials online. If you dig electronics, this skill should be in your repertoire.
Keep in mind that most can source lots of current but can sink almost none. Trust me, best power solution bang for the buck for things that can be plugged into the wall.

13

Yes of course. Or any 5-6V, 15A (or greater) power supply.

14

I have the pwm and enough power but it looks like I can't program the pwm via python+ arduino can I connect the servos in series and control them via the ard.

15

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