SIEMENS
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Siemens NC 62 · 2016
Main spindle motors
SIMOTICS M synchronous motors for SINAMICS S120
SIMOTICS M-1FE synchronous built-in motors
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Overview
SIMOTICS M-1FE1 built-in motors
SIMOTICS M-1FE2 built-in motors
The SIMOTICS M-1FE built-in motors are water-cooled
synchronous motors that are supplied as stator and rotor
components. When the stator and rotor have been mounted
to the spindle in the spindle box, a complete spindle unit is
created.
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Benefits
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Compact design (e.g. for turning machines and vertical
milling machines) by dispensing with mechanical compo-
nents, such as motor switch armature, belt drive, gearbox
and spindle encoder
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High power density thanks to water cooling
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Maximum speeds up to 40000 rpm, torques up to 1530 Nm
in S1 duty
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Higher torque – up to 60 % – with the same active component
volume, consequently more compact machine design
compared to SIMOTICS M-1PH2
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Extremely short ramp-up and braking times (50 %) thanks to
higher torque compared to SIMOTICS M-1PH2
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Cold rotor due to excitation using permanent magnets in the
lower speed range and lower power losses in the rotor,
resulting in reduced bearing temperature rise and spindle
expansion
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The stator and rotor are
ready to install
, no finishing is
necessary
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The absence of drive transverse forces permits extremely high
accuracy on the workpiece thanks to smooth, accurate
spindle motion even at very low speeds.
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Larger rotor inner bore than squirrel-cage rotor of asynchronous
motors, but with the same outer diameter – of advantage with
regard to the bar capacity of automatic turning machines and
results in higher spindle stiffness due to larger shaft diameters
for milling spindles
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Increased rigidity of the spindle drive, achieved by mounting
the motor components between the main spindle bearings
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Less cooling capacity required for the same power compared
to SIMOTICS M-1PH2, i.e. greater efficiency
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Only one encoder (hollow-shaft measuring system) for
sensing motor speed and spindle position
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Simple servicing by replacing complete motor spindles
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Compatible system of SINUMERIK, SINAMICS S120 and
motor, therefore fast commissioning is ensured
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Higher machine productivity:
The permanently excited motor spindles (PE spindles)
increase the power density and economic efficiency of CNC
machines. The optimized combination of SIMOTICS M-1FE
built-in motor, drive control and CNC offers further opportuni-
ties for rationalization, such as shorter workpiece machining
times and fewer clamping faces.
© Siemens AG 2016