Hi and thanks for your kind words.
I edited the first post so people now have a link to the website where I bought it.
I advice to pay by CC, Paypal or Western Union. I paid by Bank Transfer, and had to pay 25 € to my bank for that, and their bank got another 39, so finally had to send another 39 by Western Union, and 20 plus for Western Union taxes, live to learn.....)
Anyways till the moment is a better machine than what I hoped. As laser engraving photos takes hours to do, I noticed the X axis motor got really really hot (too hot to touch by hand, and that means 80C or so) only half an hour after beggining any job.
So I have been looking into steppers (only used to brushed and brushless motors in RC) and discovered that steppers are feeded all the time, so need an accurate regulation of power for not to be burned. After discorver this, this morning I took a look into the PCB image that the seller sent to me and discovered an small pot in the driver. You have to move in to the left (counterclockwise) to give less power to the X axis motor. Just a bit, I think about 15 to 30 degrees, if You move too much the motor will stop cause not enough power. Now I´m doing a mirror engraving, been running it for 3 hours 21 minutes (73 % of the file) and the stepper is now barfely warm.
I think this is cause the drivers are adjusted for two steppers instead of one (Y axis has two steppers, one in each side) so the X axis alone stepper need to have its driver regulated properly.
When finish this later engraving I´ll post the settings I´m using at the moment in the GRBL controller. I can´t get them with the controller running.
Saludos and thanks for your time and help,
I attach here a picture to show what i mean about the driver: