1st 10 LEDs
1. Gear 1 – this light should be on whenever the machine is in low gear. LEDs labelled Gear 2 thru
Gear 4 are not used.
2. SPD-FAULT – this light will be on whenever the AC drive is in a fault condition, which includes an
Emergency-stop message from the pendant.
3. SPD-RUN – this light should be on whenever the spindle is running
4. LED labelled SPD-ENABLE – this light should be on whenever you are in DRO, tool setup or RUN
mode.
2nd 10 LEDs
1. E-STOP OUT – this light should be on whenever the Emergency stop is in the out position. When
the E-stop is pressed, this light should go off.
2. LATCH RELAY – this light should be on when the spindle is running or if the spindle is not running
and the fwd/rev switch is in the off position when in DRO, tool setup or RUN mode. Note – if
spindle won’t turn on and the spindle is enabled and the E-stop is out, then either the fwd/rev
switch is bad or the spindle control module is bad.
3. TAP MODE – light should be on whenever you are not tapping. Light will be off when in the tap
event. Not applicable to SMX2500.
4. TAP REVERSE – this light will be on when the spindle changes direction at the bottom of a tap
event and back off after the spindle changes direction once outside of the tap event. Not
applicable to SMX2500.
5. REV-RELAY – when fwd/rev switch is in reverse this light will be on. Note – this does not mean
necessarily that the spindle will be running this direction.
6. FWD-RELAY – when fwd/rev switch is in forward this light will be on. Note – this does not mean
necessarily that the spindle will be running this direction.
7. Z-LIMIT PLUS – this light will be on only when the Z axis plus limit switch is triggered.
8. Z-LIMIT MINUS – this light will be on only when the Z axis minus limit switch is triggered.
4.7.6 Electrical Box – SMX 2500
The electrical box is made up of the following main components:
1. Safety Relay – disconnects power during an E-stop condition,
2. Transformer (415 volt to 110 volt),
3. Contactors for spindle motor and coolant pump,
4. Overloads and fuses for protection.
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