The high-precision pan-tilt table is based on the world's smallest servomotor of all hollow shaft types.
The servo motors of the MDD (Micro Direct Drive) family are available in
dimensions from 13 mm to 70 mm in three lengths. These robust, space-saving
motors are very quiet, extremely precise and are used in a wide range of direct
drive applications where precise positioning is required in addition to high torque.
They
offer speed and precision in a compact design that can be customised to meet individual
application requirements. The low-noise MDD motors consume less power than other motors
with comparable performance and service life.
Thanks to a special winding, robust ball bearings
and extra strong magnets, these compact motors achieve a very high torque (up to 1000 mNm, with
peak values up to 3100 mNm) and enable better load control. A simplified design
and the low number of individual components ensure reduced downtimes and low
maintenance requirements. The exceptionally high torsional rigidity, high speed and
precision of the MDD motors are achieved through its design, in which the shaft is
directly connected to the gearbox. For precise positioning, the motors have an
integrated encoder (absolute or incremental) with a resolution of up to 21 bits.
On request, the MDD series can be supplied with a hollow shaft and customised adaptations
(e.g. special seals) are possible. At the SPS, the supplier will demonstrating the
performance of its motors using a pan & tilt stage in which the following components
are installed:
-
MD-3012-108KE with incremental encoder, resolution of 432,000 ppr (pulses per rotation) for the horizontal axis
-
MDH-7018-648KE with incremental encoder, resolution of 2,592,000 ppr for the theta axis
The motors are controlled via the MC200-7220 servo driver and another from Arcus.
MD-3012 family
