30
WARNING:
DANGEROUS VOLTAGES EXIST FOR THE VOLTAGE LEVEL CHECKS!
2. Check voltage levels. As stated in the Electrical Safety Rules, only qualified
personnel (as described in chapter 1) should attempt to take these measurements.
With the electrical cabinet door open, turn on the main power at the disconnect
switch. Do not enable the drives, i.e. do not push the ENABLE button on the front
panel.
A. Check +24 VDC. Measure between terminal blocks 12 & 22
B. Check +5 VDC. Measure between + and – V pins on the 5 VDC power
supply if present.
C. Check 110VAC on the secondary side of the 110 Volt transformer, or
between terminal blocks 1 & 2. The AC voltage must be between 110 and
125VAC.
Turn the main disconnect switch to the OFF position, powering down the machine.
Close and lock the door of the electrical cabinet.
Visually Check That Guards Are In Place
1. Required Guards for Mills
Milling machines and machining centers should have way covers on all three
axes, closing off the pinch points associated with machine axis motion. All
machining centers, by definition, have a full enclosure around the machining
area. Check that the enclosure door operates smoothly. CE-compliant
machining centers should have a locking switch on the enclosure door.
Horizontal carousel tool changers should have a circular cover over the tool
platter.
Toolroom milling machines by definition do not have a tool changer or an
enclosure. CE-compliant toolroom machines are equipped with a table guard, an
enclosure fastened to the table itself. The table guard is open at the back in
order not to impede machine motion. On CE machines and non-CE machines,
there are splash guards on either side of the machine column.
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