Diodes usually have a line code on them similar to resistors. They have wattage ratings also. If you are capable of removing the diode from the board check out an electronics catalog and look for one with the same code on it. Be really careful in the removal. Too much heat can quickly destroy related nearby electronic components. If you are getting the same readings by reversing your meter probes, check to see if there is something shorting out the diode on the opposite side of the circuit board before you go and try to remove it from the board.
THe spindle sop switch on your controller panel is often referred to as the E-stop button. This switch is normally closed during regular operation. WHen you press down on it, the circuits are broken (opened) which quickly turns off the spindle and or servos to prevent damage to the machine and or operator!
What is the nature of the damage to the switch. Is is a cosmetic chip out of the button or has the switch been dislodged from the controller panel surface, is it a contact problem??? Each of these has a different consequence. Some more serious than others? Can't realy tell by your description.
Hope this is some help.  |