hi every one. this is my first step to arduino. my project is to use 3 little servos with an arduino (look like cnc machine) . my question is which version do i need (i am looking for the chipiest solution to do this) and do i need other stuff ?
i hope to use the corona 929 digital but i take every advices for a better working.
i use servo instead of stepper because i dont need to slide more than 3 cm and i can find servos for 6 euros. thanks a lot.
my question is which version do i need
Which version of what?
Any Arduino will be able to do this.
do i need other stuff
With three servos you will need an extra power supply, you can't use the USB as it won't supply enough current.
Hobby servos will be much cheaper than stepper motors but they are unlikely to be as precise or as repeatable.
Interesting project. I will be interested to know how well it works. I have a few servos sitting in a box.
...R
thanks a lot both of you. so i can wired the three on a arduino without any other components?
sometimes i see people using "ramps", what is it please?
my project dont need to be "ultra" precise, just enought to be understand (the writing) , i inspired on the Piccolo project, i want to write an hour like 18:15. i want to use steel arm to push the chariot(with the pen) on the x or y axe . i don't know if you see what am i saying.
With servo motors you don't have control over the rotation speed. This may already become a problem with straight (orthogonal) lines, when you move the pen too fast. Drawing other (diagonal) lines requires that the motors move at different speed in the X and Y axis, what IMO requires either linear (speed controlled) or quite expensive programmable servo motors. Or you have to split any curved line into segments in X, Y or XY direction, and move step by step from pixel to pixel. With stepper motors you have full control over the speed and position when doing the same pixel-by-pixel moves.
i see what you are talking about, but it's only a time i want to write so i don't need curve. I am glad to see people helping me. thanks arduino for being.
do you think my idea to move the chariot with (i don't know the name) an arm per axis is a good thing? better than pulley. i choose this cause in my mind that sound more simple and cost less in time and money to do but maybe i am wrong. i do my first step in diy.
Try Youtube to get some ideas.
Google the words
TRS drawbot
For an example of using a servo for drawing.
wow thanks to you!