more on Spindle Drive Fault
Thanks for the reply, Al!
I don't know what kind of spindle controller is fitted. I am new to CNC maintenance but will try to find out Monday.
More information:
The fault happens when the mill is in transition between steps, such as pulling back from the work for a tool change, etc., not while actually milling (cutting on the part).
The W axis motor moves the table toward or away from the head. After more thought, I expect the problems with the W axis motor don't have anything to do with the Spindle Drive Fault - just happened to start at the same time.
I did more research after posting my first message here. The expanded Spindle Drive Fault message says, in part:
PLC input 100.00/18
Elec. Schem Line 4104
On digging into the manuals, on Sheet 41 (probably no significance that it was on sheet 41), between 4104 and 4106 in the left margin, I found:
S-DRV/TB1 LINE 1312<------ 18 18->>-->>-18 100:00/18 DI_SDRV_NF
I substituted a few characters and made a few other compressions in the above to try to make it fit this format.
The "---" is actually straight lines in the manual.
There is "1018" just above the line going from "1312" to thie first "18", which appears to mean that line is "1018".
The first two "18"s, going from left to right, are in a skinny vertical box, going from the top of the page to the bottom, labeled "40TB". There are many similar connections apparently going through that box.
Also there is what looks like a screw head, that is a circle with a diagonal line in it, just to the left of the first "18" I showed. I believe all this means the signal in question goes through terminal 18 of 40TB. What do you think?
The third "18" and everything to the right of it are in another tall, not so skinny box with:
"CMDH I/O #1
Rack: 0 Card: 0
J1 Contact Signal Name"
at the top.
From that, I take it that the signal comes from or goes to Input/Output card #1 located in the CMDH (whatever that is) and it goes through J1 pin 18. I don't know what "100-00/18" means. I also don't know what "DI_SDRV_NF" means but think this must be an important clue to the problem. Your thoughts on this would be appreciated.
Thanks again!
Mike