High Torque Rotary Unit • ST0055 - ST0140 • R04-2014
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Product description
3.2 Function
3
3.2 Function
The engine is controlled via a servo drive and turns, accelerates or delays the rotary disc
of the machine. The rotary disc can be operated left-running, right-running or oscillating.
A high level of positional accuracy and repeat accuracy are achieved through the integra-
ted measuring system.
In stillstand, the rotary disc can be held in its position with the optional holding brake. The
brake force is created with springs. The brake is lifted by electromagnetic control and clo-
ses automatically if the voltage is turned off or in case of power outage.
The High Torque ST0055 rotary unit does not have a brake. No optional brake is
available.
The High Torque ST0075 and ST0140 rotary units can optionally be supplied with an
electric holding brake.
The High Torque ST0055 rotary unit is equipped with a gearbox.
The High Torque ST0075 and ST0140 rotary units are equipped with a direct drive.
3.3 Technical data
High Torque Rotary Unit ST055 ST075-1 ST075-2 ST075-3 ST140-1 ST140-2
Gear reduction ratio i = 63 -- -- -- -- --
Nominal torque 18 Nm 0,5 Nm 1,0 Nm 1,4 Nm 7,5 Nm 15 Nm
max. Torque 36 Nm 1,4 Nm 2,8 Nm 4,2 Nm 18 Nm 36 Nm
max. speed 5000/min 1000/min 600/min 600/min 600/min 600/min
Nominal voltage 200 VAC 230 VAC 230 VAC 230 VAC 230 VAC 230 VAC
Nominal current 0,68 A 0,5 A 0,6 A 0,7 A 1,9 A 3,1 A
Peak current 0,7 A 1,6 A 1,9 A 2,2 A 5,6 A 7,5 A
Holding torque of the
brake
-- Nm 0,5 Nm 0,5 Nm 0,5 Nm 15 Nm 15 Nm
Temperature monitoring
PTC*
* ST0055 with PTC single, 60 Ohm cold, > 1kOhm at 120 °C
* ST0075 and ST0140 with PTC triple, 180 Ohm cold, > 1kOhm at 120 °C
Heat class
F
Heat class of the isolation system according to EN600341
Concentricity 0,04 mm 0,01 mm 0,01 mm 0,01 mm 0,01 mm 0,01 mm
Axial run-out 0,02 mm 0,01 mm 0,01 mm 0,01 mm 0,01 mm 0,01 mm
Weight
1,06 kg 1,6 kg 2,1 kg 2,6 kg 6,9 kg 8,6 kg
Weight with standard encoder and without brake
Measuring system Interface Sick-Stegmann Hyperface
Type SEL37
SEK52
SKM36
SEK90
Precision ± 270"
± 280"
± 120"; SIL 2
± 130"
Measuring system Interface Heidenhain EnDat
Type --
ECN413
ECN413
ECN113
ECN225
Precision --
± 60"; 512 lines
± 20"; 2048 lines
± 20"
± 10"
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