DIY Servo Controller - Four Channel

[mclovin12q]

1:49 its like a jackpot machine

[roory20]

Can I make the servo spin the other way when I reverse the polarity? Or will my servo fry if I do that?

[ivanblogs]

@roory20 I'm using standard brushed DC motors (with position encoders fitted, and connected to a customer built controller) as servos. Reversing the polarity (and A/B in the the encoder wiring) will reverse the direction.

[ivanblogs]

@roory20 I'm using standard brushed DC motors (with position encoders fitted, and connected to a customer built controller) as servos. Reversing the polarity (and A/B in the the encoder wiring) will reverse the direction.

[565Customz]

...can someone just do a basic video of how a servo setup works, (what you need etc)????? this is cool, but doesnt really tell me much.

[stdavross666]

what is that noise? when they stop? and how does it adjust itself slightly when they stop?

[ivanblogs]

@stdavross666 The noise is the switching frequency of the servo drive. The motors are turned on & off 10,000 times a second. The length of "on" compared to "off" results in different levels of "power" being applied. Those small vibrations at 10Khz are audible.

[ivanblogs]

@stdavross666 The motors won't just sit in any position, as there is a natural inclination for the motor to "stick" in different parts of its rotation (cogging).

Small amounts of power are continually applied to counter this. The small movements are the controllers final adjustments to get it exactly where desired. The speed it can make these adjustments are increased by correct tuning.

[stdavross666]

@ivanblogs Thanks for the reply. I like the noise they make...And the self adjusting part is cool. I will just stick to my PICAXE for now cheers from Perth WA.

[ragingelephants2005]

i think this is cool and all, i just dont understand what this would be used for..i keep seeing people write about djing, can you use it to make music or something. i know im going to get bashed for not knowing

[ivanblogs]

Servos are used in robotics and industrial control.

In other videos of mine, you'll see them connected to a metal milling machine.

[UglyToontown]

@ivanblogs i didn't notice this comment before. i understand now.

[UglyToontown]

that's actually a good question and keen of you to pick up on it. that's why i'm watching this video to be honest. to answer your question, no, you cannot use this to "make music". the potential is there to use this to manipulate music digitally, however. if you'd like to know more, message me and i can explain. but i'm with you, i don't understand what this would be used for other than by hobbyists of robotics.

[rroge5]

very usefull

[SaciWeldAinAzel]

Hi,

I am very impressed of your work !

four DC servo controller with just one microcontroller ! nice job !!!

[togaida]

Can you or anyone else here) help me, I've been given a few 12 DC servo motors that I would like to attach to my sherline cnc mill, only I don't much about servo motors and their drivers only stepper motors, would love to make the servo driver featured in th vid, but I can't seem to find the website, seems it isn't up any more, can anyone help?

[muhaiminmanjoi]

it's great. i want to make a project like this. can u help me detail the circuit and the parts use? thank you

[mistert569]

It's great. What kind of uC you use and could you share program and schema boards of your project?

[ivanblogs]

ATmega644P. Firmware and boards are still a work in progress. Check my blog (url in description) for any updates.

[rismorismo]

Hi! Which kind of motors you are using? I gues those arent steppers couse of "servo" is mentioned at article? Nice speed with accurasy, so what kind of positionfeedback has those? Dunno correct word but i mean that feedback loop of current position and adjusting it. What software are you using?

[ivanblogs]

These are JX Motor Co MY1070 DC 36V 750W scooter motors. They're run here at 12V.

They are fitted with US Digital E4P miniature encoders (see earlier videos).

I'm using a "PID controller" implemented in firmware I wrote for the Atmel microcontroller.

Commands are simply issued from a serial terminal.

Later videos show them under motion control from CNC software.