Arduino Uno, high torque DC servo motor and ATX power supply

Other Hardware Motors, Mechanics, Power and CNC
1

Beginner here, want to control 60kg servo with Arduino Uno. As servo uses 6v-8.4v I need to use external power supply. Will connect ground pin of Arduino and power supply ground as it is required.

Idea is to connect: 12V from ATX power supply->Dc In->Step-Down DC converter->Dc Out->60KG servo

As a beginner I do not know if this is appropriate solution to this issue or I need to change my approach and thinking?

Here is the dc servo: DS5160 Digital Metal Gear Servo Torque 60KG DS5160 Digital Metal Gear Servo Torque 60KG 180° 270° For RC Car Helicopter Boat | eBay

DC 300W 20A CC CV Constant Current Adjustable Step-Down Converter Voltage Buck: DC 300W 20A CC CV Constant Current Adjustable Step-Down Converter Voltage Buck | eBay

2

You MAY be able to get away with using the 5V from the PSU.
Connection data isnt shown.

Spec for a similar servo motor:

No. Operat voltage: 6V;8.4V
4.1 Idle current: 5mA; 5mA
4.2 No load speed: 0.17sec/60°;0.13sec/60°
4.3 Runnig current: 400mA;510mA
4.4 Peak stall torque: 58.5kg.cm;70kg.cm
4.5 Stall current: 8.5A±10%;10.4A±10%
4.6 Working voltage range: 4.8-8.4V

3

You could use the arduino to control a relay to turn the power to the servo on and off

4

Why would the OP want to do that? With no power to the servo you have no control and it may move under any load.

Steve

5

Thanks for the answers. I'm programmer and new to electro-mechanics so I want to learn step by step and avoid mistakes that will waste my time. Know some theory but have no one that I can talk to and to help me with this beginner steps. Had ordered first this step-down converter and will try to test it with some load; and amperemeter to check what it can provide in current. Afterwards I will going to buy and this 60kg servo.

6

But I want to precisely control angle, like 20 or 45 degrees, then back 15 degrees. For robot arm. I can not do this only with relay turning it on or off.

7

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