First off I want to thank all you guys for your posts here concerning AL-12 alarm on spindle drive unit....
I have a Kitamura Mycenter-1 that has a Fanuc OM control....the other day, I had the spindle stop working and I got the AL-12 alarm.
I tried to avoid messing with the Board itself......so I just replaced the main transistor inside of the unit......
When I first put power to machine....I could home the machine....but when I tried to activate spindle...nothing....no alarm either.
When I shut down....the drive readout went from "0000" to "AL-10 low voltage" for only a split second at shutdown....I turned it on and off like 3 more times and the spindle finally came back on. I ran the spindle for about 5 minutes....even changed a tool.....sent a program, went to run it.....got the AL-12 alarm again.....
So, I know what I "didn't do" and that was change out the parts on the board that were described by "not an expert" here on this thread.....and that is to change out these parts below on the board.....
1.) Transistor (in my case it is a "ET191"...quantity 7)
2.) Diode for transistor (self explanatory...quantity 7)
3.) Photo coupler (mine is a "TLP550"....quantity 7)
4.) Hybrid (still trying to figure out where that is) - NEED HELP ON THIS ONE!!!
A.) Main Transistor obviously needs replaced again....it is "A50L-0001-0125#A"...no problem there.
below is a pix of my board and of the transistor that was pulled from the unit the first time.
Im really looking for reassurance that I am not missing anything here in the board repair......should I replace all capacitors?......again....help with the Hybrid please
Here is a pix of the Board....
A16B-1100-0200 /12A
Here's a pix of the transistor unit
Any help would be awesome!!!!...thanks!