Micromech Ltd.
Micromech are the UK leading experts in positioning and speed control supplying a wide range of m……...

The STM System is a ground-based robotic testbed facility developed for the Canadian Space Agency's STEAR (Strategic Technologies in Automation and Robotics) program. It is a kinematically identical version of the SPDM (Special Purpose Dextrous Manipulator) built by Canada for the International Space Station. The STM System forms the core of the CSA's CART (CSA Automation and Robotics Testbed) facility , which is used for:
Development of space station work tasks
Testing of robot technologies
Control methodologies
The STM System consists of two seven-degree-of-freedom, 7 ft. long manipulators, each provided with a control computer. It also includes a machine vision system and a workstation to act as a high level operator interface and a testbed server.
Each of the STM manipulators has one EMDC (embedded module for distributed control) for each actuator. The EMDCs use a 68332 microcontroller for control algorithm processing and a transputer for data communications. Each actuator can be controlled in position or force control mode. The actuators are based on brushless DC motors with harmonic drives.
ISE SPDM Testbed Manipulator (STM) is kinetically identical to the dual arm 7 degree of freedom Special Purpose Dextrous Manipulator (SPDM) that will fly on Space Station Alpha. The electric STM is built in either single arm or dual arm configurations.
The STM reach is 2 metres
The payload for the STM is 14 Kg in the presence of gravity
The accuracy of the STM using computer vision feedback is .125 mm. Without vision the accuracy is 6 mm
Unload endpoint velocity is .1 m/sec (min) in any direction
STM is equipped with the "Integrated Robot Controller". A significant aspect of this controller is that it provides to the STM impedance control capability. Therefore, the STM can interact with its environment with stability. This allows the STM to effectively perform, for example, insertion tasks.
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