spindle alarm 409

control:0-MD
alarm 409. on the spindle amplifier, led indicate number 12.
what does it mean? how to fix it?

Ouch ...$$$.
Unfortunately this usually due to the IGBT transistors shorted.
The firing board should also be checked before a blanket replacement of the semi's, if this is in fact the case.
Al.

how to check if it'is the IGBT. Can i replace only the transistor or it is easier to ship the amplifier to fanuc and buy a new one?

could it be caused by anything else outside the spindle amplifier module. If I change all the module, can i be sure that it will fix my proplem. Do you have a shematic of the amplifier(A06B-6082-H211#h512) What is the firing board?

The IGBT can usually be checked with a meter for shorts, I have replaced them only to have them blow as soon as power up, they are not cheap, so now I just send them in for a complete check including the firing board.
There is North American Industrial in Mississauga that repair them.
Al.

changed igbt and it works again.

Lucky you.:cool:
Al.

O Alarm 409 no spindle serial se refere a comunicacao entre o spindle e a fonte ou o spindle e o cnc.
obrigado

hellow, i`m operate CNC machine for last one week there is showing spindle alarm 409.
Tell me whats its mean, and how can we overcome, as soon as possible help me with the nick of time so that i will able do work with previous speed.
contact:03238829713