Method of controlling cylinder apparatus

A method of controlling a cylinder apparatus, comprising the steps of:

• supplying compressed air of a first high pressure to a first chamber of a cylinder which is divided into first and second chambers by a piston, and exhausting air from the second chamber so as to move the piston from a start position at an end portion of the first chamber toward an end position at an end portion of the second chamber along an extending direction of the cylinder;
• providing detection means, arranged on the cylinder, for detecting a position of the piston to detect a remaining moving distance as a distance between a current position of the piston and the end position;
• and
• decreasing a moving speed of the piston by supplying air of a second high pressure lower than the first high pressure to the second chamber when the remaining moving distance becomes equal to a target distance, wherein
• the target distance is changed so as to cause a deceleration time as a time from a beginning of the decreasing of the moving speed of the piston to arrival of the piston at the end position to coincide with a predetermined target deceleration time.

A method of controlling a cylinder apparatus, comprising the steps of:

• supplying compressed air of a first high pressure to a first chamber of a cylinder which is divided into first and second chambers by a piston, so as to move the piston from a start position at an end portion of the first chamber toward an end position at an end portion of the second chamber along an extending direction of the cylinder;
• providing first detection means, arranged on the cylinder, for detecting when the piston passes a first position;
• exhausting air from the second chamber;
• and
• decreasing a moving speed of the piston by supplying air of a second high pressure lower than the first high pressure to the second chamber after an elapse of a wait time from when the piston is detected to pass the first position so that the piston reaches the end position with a shock lower than a predetermined level.