Quadruped Help

Hello, i have recently make a quadruped from 3D printed parts, using an arduino mega 2560. I’m using a combination of two kinds of servos, in the base and tibia im using plastic gear servos and in the femus i’m using metal gear servos. To try to regulate the voltage i bought a modifiable voltage regulator.

The problem is everytime i upload to the arduino the servos go to different positions for a few minutes before going to the given ones, also the volt regulator instead of saying that its sending 6v in its output it sends 4.1-4.6v while the problem is happening.
If you need pictures or links to the products ill be happy to send them.

The voltage problem may be due to insufficient current capacity.

The servos will go to wherever the program instructs it to go. If you turn it off at 0 deg and your program initialises it to 90 deg, it will move at start up. You could have a shutdown procedure to put the servos to the initialising position before turning off.

Weedpharma

weedpharma: The voltage problem may be due to insufficient current capacity.

The servos will go to wherever the program instructs it to go. If you turn it off at 0 deg and your program initialises it to 90 deg, it will move at start up. You could have a shutdown procedure to put the servos to the initialising position before turning off.

Weedpharma

ok do you think i need to upgrade to a lipo battery? do you think its a coding problem?

FloppyDisck: ok do you think i need to upgrade to a lipo battery? do you think its a coding problem?

Which part of my post are you referring to?

Not knowing what you are currently using for power or regulator or motors or program, I cannot answer.

Weedpharma

weedpharma: Which part of my post are you referring to?

Not knowing what you are currently using for power or regulator or motors or program, I cannot answer.

Weedpharma

using 6 AA batteries and this is the volt regulator http://www.banggood.com/4V-40V-DC-DC-Step-Down-LM2596-Voltage-Regulator-Converter-Module-p-80885.html

http://www.banggood.com/4V-40V-DC-DC-Step-Down-LM2596-Voltage-Regulator-Converter-Module-p-80885.html

This should be ok but are your batteries able to supply the current? Measure the battery voltage on startup.

Give us a link to the servos and how many you have on your device.

Weedpharma

Since you haven't told us what servos you're using (or how many) it's hard to say what sort of power requirements you will have.

I think it's very unlikely the regulator you're using is up to the task of supply all those servos power.

FloppyDisck: using 6 AA batteries

What kind of AA batteries? Li-Ion AA? NiMH AA? Alkaline AA?

Here are a couple recent threads which discuss power supplies for servos.

A robot arm project.

Servo array project.

DuaneDegn: Since you haven't told us what servos you're using (or how many) it's hard to say what sort of power requirements you will have.

I think it's very unlikely the regulator you're using is up to the task of supply all those servos power.

What kind of AA batteries? Li-Ion AA? NiMH AA? Alkaline AA?

Here are a couple recent threads which discuss power supplies for servos.

A robot arm project.

Servo array project.

i'm using alkaline and they are 12 servos, 4 of them are metal gear and need the same amount of voltage which is 6v. Im thinking on upgrading to a 11.1v lipo and using the same volt regulator. Later today i will test each leg individually

here are the servos 8 of these http://www.robotshop.com/en/9g-micro-servo-motor-4-8v.html 4 of these http://www.hobbyking.com/hobbyking/store/__14459__Corona_939MG_Metal_Gear_Servo_2_5kg_0_14sec_12_5g.html

weedpharma, thank you, it was a current problem, i know how to fix it now

Please let us all know what happened and how you fixed it. This will help other members.

Weedpharma