Method for controlling the rotational speed of a rotary body

• US 4,197,679 A
• Filed: 06/29/1978
• Issued: 04/15/1980
• Est. Priority Date: 04/15/1977
• Status: Expired due to Term

• Current Assignee: ITO & Okamoto Esq
• Original Assignee: ITO & Okamoto Esq
• Inventors: Yamada, Takuro, Matsuda, Shoei, Katsumi, Yasuo
• Primary Examiner(s): Whitehead, Harold D.
• Application Number:
  US05/920,355
• Time in Patent Office: 656 Days
• Field of Search: 51/101 R, 51/105 R, 51/105 EC, 51/165 R, 51/165.89, 51/281 R, 51/281 C, 51/165.77
• US Class Current: 451/11
• CPC Class Codes: B23Q 15/10 to maintain constant cutting velocity between tool and workpiece
• CPC Class Codes: B24B 19/125 electrically controlled, e.g. numerically controlled

Abstract

A method for controlling the rotational speed of a rotary body in which drive means for driving the rotary body is actuated on the basis of predetermined step-like speed command values corresponding to rotational angles of said rotary body. At transition points between said step-like speed command values are preset one or more intermediate speed command values so that the rotary body will change its rotational speed smoothly.

Claims

1. In a method for controlling the rotational speed of a rotary body in which the drive means for rotatably driving the body is actuated on the basis of predetermined step-like speed command values at predetermined rotational angular positions of the body, the drive means having a nonzero response time between the application of a new speed command value and the realization of the commanded rotational speed, the improvement comprising supplying to the drive means at each transition point between the predetermined step-like speed command values of the rotary body at least one intermediate speed command value for driving said rotary body at a speed intermediate the predetermined step-like speed command values before and after the speed change carried out at the transition point, each intermediate speed command value being supplied to the drive means for a period for causing the transition between the predetermined step-like speed command values to be shorter than the response time of the drive means.

2. The improvement as claimed in claim 1 in which a plurality of intermediate speed command values are supplied to the drive means at each transition point.