Spindle configuration

This is no longer a LinuxCNC question, and so I am only able to guess what the problem might be, and probably guess less effectively than you.

Maybe the tachometer (or command) is reversed and that causes an error at high speeds?

Is every terminal that was previously connected when it worked still connected to something?

When the spîndel goes to higher voltage the relay on X2 board is continuosly shut on and off

Perhaps the power supply to the board is weak?

Hi,

I have fund some more information about the X2 panel.
So when i try to set a voltage of 0.5V the relay K500 is switched on and of.
K500 is on the bottem left.
when K500 switched on and of the RF light is switched on and off and everything is going in pulses.
Maby somebody that understand this schedule.

Thank for having a look.