Fanuc ac spindle drive alarm#4

[movick_25]

need help! I have fanuc spindle board with Printed board A20B - 0009 - 053. the problems every give command M05 (spindle stop) some times alarm 4 Led ON (this mean Fuse F1,F2,F3 For AC input Blow Out), I checked fuse input but no fuse blow. if i press button reset at bottom left of board, alarm was reset. how can i solved this problem???

[guhl]

I can send you circuit diagrams for this drive
let me know you email

[bewide]

please do send me at my id:

ahe_303@rediffmail.com

Originally Posted by guhl

I can send you circuit diagrams for this drive
let me know you email

[guhl]

email sent

[movick_25]

Guhl, can you sent the drawing to My email? Movick_25@yahoo.co.id

Thanks

[MMMMM]

Possible resistor issue - Does this happen EVERY time you issue an M05?
Have you recently added a large mass to your spindle?

When you issue an M05 (stop) command, the amplifier is commanded to reverse its current to slow the spindle.
Usually, this is called regenerative feedback. The energy required to reverse a drive needs to go somewhere. All amplifiers will have resistors to absorb this energy in the form of heat. (for basic terms) Some larger drives will have an external resister pack.
These resisters are subject to thermal sensitivity due mostly to the fact that they're not checked/cleaned on a regular basis.

Locate your resisters. Ensure connections and resistors are clean and secure. Ensure proper ventilation.

[nebraQ]

Check to see fuses FG and FH on the printed circuite board. This fuses protect regenerative transistors.