Abstract: Provided is a composition containing: a polymer (I) having a polymerization unit (I) based on a monomer (I) represented by general formula (I); and a fluoroelastomer, wherein a content of the polymer (I) is 0.0001 to 1.0% by mass based on the fluoroelastomer: CX1X3?CX2R(—CZ1Z2-A0)m??(I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.

Abstract: An electric cylinder system includes: an electric cylinder including a rod and a strain detector; an output unit configured to output, on the basis of a reference load value in accordance with an output value of a strain detector for calibration obtained when the rod presses the strain detector for calibration and a measurement load value in accordance with an output value of the strain detector obtained when the rod presses the strain detector for calibration, a gain and an offset for causing the measurement load value to approach the reference load value; a storage unit configured to store the gain and the offset as a calibration parameter; and a calibration unit configured to calibrate a load value in accordance with an output value detected by the strain detector on the basis of the calibration parameter wherein the gain and the offset satisfy a preset relationship.

Abstract: An electric cylinder system includes: a rod; a ball screw mechanism; a nut connected to the rod; a cylindrical body including a contact portion, the contact portion configured to be abutting the nut making the linear motion, the cylindrical body configured to support the ball screw mechanism in such a manner that the ball screw mechanism is displaceable in the axis direction of the ball screw; a strain detector fixed to the cylindrical body and configured to detect a value corresponding to a displacement of the ball screw mechanism; and a control section configured to make the ball screw mechanism be displaced by making the nut abut against the contact portion, and configured to detect an abnormality of the strain detector based on the value detected by the strain detector according to the displacement of the ball screw mechanism.

Abstract: An electric cylinder system includes: an electric cylinder including a rod and a strain detector; an output unit configured to output, on the basis of a reference load value in accordance with an output value of a strain detector for calibration obtained when the rod presses the strain detector for calibration and a measurement load value in accordance with an output value of the strain detector obtained when the rod presses the strain detector for calibration, a gain and an offset for causing the measurement load value to approach the reference load value; a storage unit configured to store the gain and the offset as a calibration parameter; and a calibration unit configured to calibrate a load value in accordance with an output value detected by the strain detector on the basis of the calibration parameter wherein the gain and the offset satisfy a preset relationship.

Abstract: An electric cylinder system includes: a rod; a ball screw mechanism; a nut connected to the rod; a cylindrical body including a contact portion, the contact portion configured to be abutting the nut making the linear motion, the cylindrical body configured to support the ball screw mechanism in such a manner that the ball screw mechanism is displaceable in the axis direction of the ball screw; a strain detector fixed to the cylindrical body and configured to detect a value corresponding to a displacement of the ball screw mechanism; and a control section configured to make the ball screw mechanism be displaced by making the nut abut against the contact portion, and configured to detect an abnormality of the strain detector based on the value detected by the strain detector according to the displacement of the ball screw mechanism.