US 2022/0187104 A1Published application

Linear Encoder

AssigneeParpas S.P.A.

InventorVladi Parpajola

Life of this patent

Estimating the term…

Loading patent…

Abstract

A linear encoder for numeric-control machine tools is provided that includes: a substantially rectilinear section-bar, which is adapted to be fixed on the structure of the machine tool; a substantially rectilinear scale strip, which is fixed on the section-bar so as to extend along the section-bar parallel to the section-bar longitudinal axis; a movable slider which is fitted/mounted on the section-bar so as to be able to move along the section-bar parallel to the section-bar longitudinal axis and skimming the scale strip, and which is adapted to be rigidly fixed to the movable piece of the machine tool; an electronic reading apparatus which is at least partially placed aboard the movable slider and is adapted to read the position of the movable slider on the scale strip; and a thermal-stabilization device which is adapted to bring and maintain substantially the whole scale strip stably at a predetermined target temperature.

Claims16

Dependent claims

A linear encoder (1) comprising:

a substantially rectilinear section-bar (2) which is adapted to be fixed on the structure of the machine tool;
a substantially rectilinear scale strip (3) which is fixed on the section-bar (2) so as to extend along said section-bar (2) parallel to the section-bar longitudinal axis (L);
a movable slider (4) which is fitted/mounted on the section-bar (2) so as to be able to move along the section-bar parallel to the section-bar longitudinal axis (L) and skimming the scale strip (3), and which is adapted to be rigidly fixed to the movable piece of the machine tool;
and an electronic reading apparatus (5) which is at least partially located aboard the movable slider (4) and is adapted to read the position of the movable slider (4) on the scale strip (3);
said linear encoder (1) being characterized by additionally comprising an active thermal-stabilization device (20) which is adapted to bring and maintain substantially the whole scale strip (3) stably at a predetermined target temperature (T0).

2 more elements

Dependencies are inferred from the claim text.