WARNING! A separate earth ground wire of the same conductor size
as the input power is required to be connected to the chassis of the
machine. This ground wire is required for operator safety and for
proper operation. This ground must be supplied from the main plant
ground at the service entrance, and should be routed in the same
conduit as the input power to the machine. A local cold water pipe or
ground rod adjacent to the machine cannot be used for this purpose.
Input power to the machine must be grounded. For wye power, the neutral
must be grounded. For delta power, a central leg ground or one leg ground
should be used. The machine will not function properly on ungrounded power.
(This is not a factor with the External 480V Option.)
The rated horsepower of the machine may not be achieved if the imbalance of
the incoming voltage is beyond an acceptable limit. The machine may function
properly, yet may not deliver the advertised power. This is noticed more often
when using phase converters. A phase converter should only be used if all
other methods cannot be used.
The maximum leg-to-leg or leg-to-ground voltage should not exceed 260 volts,
or 504 volts for high-voltage machines with the Internal High Voltage Option.
1 The current requirements shown in the table reect the circuit breaker size
internal to the machine. This breaker has an extremely slow trip time. It may be
necessary to size the external service breaker up by 20-25%, as indicated by
“power supply”, for proper operation.
2 The high-voltage requirements shown reect the Internal 400V conguration
which is standard on European machines. Domestic and all other users must
use the External 480V option.
ai r re Q U i r e M e n t S
The mill requires a minimum of 100 psi at the input to the pressure regulator
on the back of the machine. A volume of 4 scfm (9scfm for EC and HS mills) is
also necessary. This should be supplied by at least a two-horsepower com-
pressor, with a minimum 20-gallon tank, that turns on when the pressure drops
to 100 psi.
Note: Add 2 scfm to the minimum air requirements (below) if the operator will
be using the air nozzle during pneumatic operations.
Machine Type Main Air Regulator Input Airline Hose Size
EC-300 85 psi 1/2" I.D.
EC-400 85 psi 1/2" I.D.
EC-1600 85 psi 1/2" I.D.
HS 3/4/6/7 incl R models 85 psi 1/2" I.D.
VF-1 - VF-11 (40Taper), VM 85 psi 3/8" I.D.
VF-5 - VF-11 (50 Taper) 85 psi 1/2" I.D.
VR Series 85 psi 1/2" I.D.
VS 1/3 85 psi 1/2" I.D.
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