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| Electrical
Features |
The
system controller module is the brains of the LT360 and contains all
of the analog and digital processing circuitry. Two microcontrollers
are employed: the main system MCU and the USB interface controller.
The main MCU is an ARM-7 32-bit processor operating at 48MHz.
Due to the high resolution of 0.1 degrees, demanding requirements
are placed on the analog control system. Both ADC and DAC components
require 16 bit resolution, as well as computer corrected linearity.
Custom thin-film resistor networks are employed to meet the temperature
tracking and stability requirements. Each LT360 unit requires 2 hours
of automated calibration and performance verification. |
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SmartTorque
The SmartTorque feature of the LT360 automatically reduces motor power when
the platter is not in motion. Since the worm drive is irreversible it is
not necessary to maintain full drive power to the motor merely to hold its
position. The worm drive locks the position automatically. Motor power is
reduced to half when the drive is not active. This increases motor life
and reduces unnecessary power consumption in many components. |
| The
LT360 utilizes a high frequency power supply with power factor correction.
This provides universal world-wide voltage support,from 85-265VAC
without user changes. The LT360 is shipped with an IEC-US power cord.
If your power plug requirements are different, you can obtain a different
IEC cord as needed from your local electronics retail stores. |
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| Mechanical
Features |
| The
LT360 drive assembly consists of two aluminum castings, platter and
base, joined through a 125mm ball bearing. The drive assembly provides
both high strength and high precision. A 1.5 In (38mm) clearance hole
is provided through the center of the assembly for cable routing. |
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| A powerful
right angle worm drive system is utilized. This type of drive system is
irreversible providing automatic locking of the platter position. A hybrid
stepper motor drives the gear system controlled by the system microprocessor.
Microstepping is utilized to provide an internal resolution of 0.003125
degrees. This enables precise control of position as well as acceleration. |
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Standard & HiTorque Models
Two model variations of the LT360 are offered: Standard and HiTorque.
There are two construction differences between the models. In the
HiTorque model a higher strength main bearing is used along with a
larger and more powerful motor. The HiTorque model has 60% more torque
than the Standard model. |
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