Spindle coast to stop?

[MTech2]

We have a kiwa excel center 4 with fanuc 10m controller. During a program cycle if the spindle is 4000 rpm or higher, and it tries to move to next step a fault occurs because the spindle is still rotating. I don't know if it's coasting or not decelerating fast enough. Any ideas on how to adjust the spindle stop or other possible fix?

[mike_Kilroy]

did it used to work?

ur description sounds like an overvoltage error. is there a db resistor on top of your machine cabinet in a metal cage? or inside the cabinet? You might check that its wires are hooked to the spindle drive or look for a fuse in series with these wires that popped. If you need to run and can afford a longer decel time, program that and you might get away without the error.

[MTech2]

Thanks Mike it was a fuse in the back section of the spindle drive. I had checked this fuse while machine was running and had voltage on both sides. The fuse has a diode figure on it. Not sure how it is designed in the circuit.