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Design, Manufacture, Transport and Integration on-site in Chile of ALMA Antennas ENCODERS

Design, Manufacture, Transport and Integration on-site in Chile of ALMA Antennas ENCODERS PM#06 18-19 June 2006. ENCODERS - Update Status. AZ encoder baseline: Reading heads possibly reduced to 8 instead of 10; decision at the final choice of bearing

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Design, Manufacture, Transport and Integration on-site in Chile of ALMA Antennas ENCODERS

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  1. Design, Manufacture, Transport and Integration on-site in Chile of ALMA Antennas • ENCODERS • PM#06 18-19 June 2006

  2. ENCODERS - Update Status • AZ encoder baseline: Reading heads possibly reduced to 8 instead of 10; decision at the final choice of bearing Alternative new interpolation boards excluded by the supplier; IK320V remains the actual and future solution. Production guaranteed. Waiting supplier schedule for tape qualification tests. • EL encoder baseline: 120mm internal diameter solution under analysis from the point of view of performances – 150mm study already implemented. IP protection studied by EIE waiting proposal from supplier; this confirmed its availability to supply the complete set protected as per prototype. Mounting and alignment w.r.t. the shaft issues under analyses. • Alternative Solutions: Still under discussion; difficulties in having information from US companies (TAA/TDL required).

  3. Encoders Block Diagram

  4. Design, Manufacture, Transport and Integration on-site in Chile of ALMA Antennas • ACU • PM#06 18-19 June 2006

  5. Preliminary Crate Layout - Front

  6. Preliminary PCU Layout

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