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公开(公告)号：US20200149859A1
公开(公告)日：2020-05-14
申请号：US16495364
申请日：2018-04-17
Applicant: RENISHAW PLC
Inventor： Christian BROWN , Hugo George DERRICK
Abstract: A positioning apparatus including a quill on which a probe apparatus can be mounted, at least one motor for positioning the quill in a substantially vertical dimension, and a pneumatic counterbalance mechanism for the quill. The positioning apparatus is configured, based on at least one factor relating to the quill, to automatically effect a change in the pneumatic counterbalance mechanism's pressure so as to thereby adapt the counterbalance force on the quill provided by the pneumatic counterbalance mechanism.
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