No worries. Thanks for the reply.
Might be, but it is just a wild guess 'cause I have a laser module (cross) wired next to the spidle, and it stoped working after a while and I did not bother to replace or remove it, and maybe it has something to do with that. Who knows. I'll worry about it when it stops me from working.

Any idea where should I open a topic about a function of a small robot? Very simple, I need 4 butons which when pressed turn a small stepper one quoter of a turn each. Like rotating a cube on each of the 4 faces when is on a flat surface. I've found a lot of the info online, but still missing some bits about remote controls and arduino programing.

I see you changed your "profile quote" if I can call it like that.