Thinks that happened from my last post.
Today I removed the board that the LED was dark, disconnected the wires from the bottom terminal
and disconnected the orange connector. The board is a Glentek 7377-1002 Power Conversion board.
I examined it even under microscope and there are no visible defects or burnouts on the board.
It appears visually in perfect condition.
On orange connector on the top of the board there are 15 pins with wires on pin 4, 5, 6, 7, 13 and 14 marked with same numbers.
On the black terminal there are four wires. The two from the top marked #3 and #4 that go to the X axis
servo and two on the bottom that are Black and Red go to the large capacitor located to the right
of the three boards.
On the very bottom of the board there is a 20 Amp ceramic fuse.
I removed that fuse and discover that it is burned but without any visible damage.
I replaced it with the good fuse expecting that it will solve the problem.
After turning the power to the machine on I received the same message about Error 18 and an “X Axis fault”.
I checked the fuse and it was burned again.
Then I disconnected the wires #3 and #4 that go to the X axis servo to eliminate possibility that
there is a short somewhere on those wires or the servo.
I installed new 20 Amp ceramic fuse on the board and turned the machine on again.
Machine went into the emergency stop again and shown the same message.
I am assuming that the other two boards ( on the right ) are exactly the same but only for
Y axis and Z axis.
Because the two wires from the black terminal that go to the X servo were already disconnected
and the two remaining wires seem to be connected to the same capacitor ( in parallel ) as other
and the result was the same my conclusion is that the board is bad.
In that case I could use the board from Y axis and if it worked it would confirm that simply X axis
board is bad. However I could destroy it if the problem comes from the wires coming to the orange connector.
That would be expensive test.
Now, my questions are:
1 - Where the wires going to the orange connector come from?
2 – Is it possible that any of them could cause the problem?
3 – Is it safe to swap the boards?
4 – Is it safe to install brand new board?
5 – Could that board go bad on it's own ( eg. just from being old ) or some other thing my
have caused board's failure?