I am in need of the schematic for Fanuc board A16b-1000-0010-08f. The feedback connection for the z motor encoder is not working on the board side. It was verified to not be working by swapping x and y feedback cables in its place.
Many thanks, Dan
I am in need of the schematic for Fanuc board A16b-1000-0010-08f. The feedback connection for the z motor encoder is not working on the board side. It was verified to not be working by swapping x and y feedback cables in its place.
Many thanks, Dan
Its been a while but if I recall correctly there are 2 chips associated with the main chunk of axis functionality on the older series controls.
A black square chip (DAC?) and a grey rectangular chip with a gold name plate (VLSI?).
I think the VLSI is a plug in (although the 1st 2 axis could be solder) and could possibly be your issue.
I recall having to add these on occasion when adding a spindle or 3rd axis.
I could also be recalling a different series control as well. Sorry I cant be more definitive but it could be a starting point.
There are also usually straps for each axis on that board. Possibly one fell off or is loose?
Maybe try swapping the 2nd (Z) and 3rd (spindle) VLSI chips. They should be exactly the same part # but confirm that..
3 grey chips with gold squares on the face 3/4 of the way down under the white Burndy connector. There is a white IC directly to the right. VLSI layout left to right; axis 1, 2, and spindle. Board may be etched with names or axis number. I believe the 3 square chips stacked vertically to the left are the dacs. Maintenance manual identifies all 3 chips as being the same but a visual check cant hurt. I looked through my archive and haven't located any 3 maintenance drawings.
Ok I just wanted to make sure I knew which ones you meant. When I talked to the Fanuc tech he told me to try swapping the one on the right with one of the others. I did with no change. I think the next step is touching up the solder connection on the back of some of the chips/sockets you mentioned.
I have the scanned schematics. Send me an email [email protected].