Rich, I was clicking to slow down the feedrate to see what's happening, without clicking it's the same, just don't consider that.
The G04 P100 dwell is there because I put it there, because between every change of direction the motor stalls, don't ask me why, because in normal turning also in G0 rapid doesn't stalls. Maybe it's for the accelerations, but they are the same with a little stop before moving, and with that doesn't stall anymore...I think is for the too fast change in direction.
If I create a standard threading code with the wizard, like M8x1.0, I think I can't see the problem, if it's there, because in proportion the movement is a lot smaller...but I will try.
The macro is the original one, I tried with G76 and with G32 from that macro.
I will try your suggestions as soon as I have some time, now I'm really busy and can't try them.
Thank you for your time for now.
Christian