Cycle timer

• US 4,549,260 A
• Filed: 07/12/1982
• Issued: 10/22/1985
• Est. Priority Date: 07/14/1981
• Status: Expired due to Term

• Current Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Matsushita Electric Industrial Company Limited (Panasonic Holdings Corporation)
• Inventors: Saito, Toshio, Matsumoto, Kenzo, Soji, Kazuo
• Primary Examiner(s): Smith, Jerry
• Assistant Examiner(s): MacDonald, Allen
• Application Number:
  US06/397,021
• Time in Patent Office: 1,198 Days
• Field of Search: 364/569, 364/559, 364/143, 364/144, 364/145, 364/183, 364/571, 340/347 SY, 340/347 P, 340/347 CC, 340/825.83, 377/17, 377/82, 377/84, 377/88, 318/572, 318/632, 318/633, 318/634, 250/231 SE
• US Class Current: 700/14
• CPC Class Codes: G05B 19/07 where the programme is defined in the fixed connection of electrical elements, e.g. potentiometers, counters, transistors
• CPC Class Codes: G05B 2219/25045 Electronic cam, encoder for sequence control as function of position, programmable switch pls

Abstract

A cycle timer comprises an angle encoder for converting an mechanical angle information into an electrical angle information, a memory unit for storing timing information and a control program for setting an output if the angle information falls within an on region of predetermined timing information and for resetting the output if the angle information falls within an off region of the predetermined timing information, an arithmetic processing unit for reading out and outputting from the memory a timing condition of the information which has been outputted from the angle encoder, and a latch circuit adapted to be selectively set and reset one at a time in response to the output from the arithmetic processing unit.

Claims

1. A cycle timer for controlling the ON-OFF periods of the operating cycle of a machine comprising:

encoder means for detecting the angle of rotation of a shaft of the machine and generating angle information indicative of the angular position of the machine shaft detected therefrom;

read-in and read-out memory means for the storage of data descriptive of ON-OFF states of output signals corresponding to the angle information, said memory means storing data descriptive of the ON-OFF states of a plurality of output signals including one or a plurality of ON regions for each output signal, the output signals corresponding to respective angle information to be read out in parallel output channels;

program means for writing the data in the memory means in correspondence with an arbitrary angular position of the machine shaft; and

output means for simultaneously reading out the data from the memory means for each of said parallel output channels in response to a given angular position of said machine shaft detected by said encoder means to turn on and off output signals from the timer, to control said ON-OFF periods.

2. A cycle timer as claimed in claim 1, wherein said program means comprises means for selecting one of said plurality of output channels and data setting means for writing ON-OFF data, corresponding to the angular position of the machine shaft, in the memory means corresponding to the one of the output channels selected by said selecting means.

3. A cycle timer as claimed in claim 2, wherein said data setting means comprises an original point correcting means for writing in the memory means the angle information, as original condition correction data, which is obtained by the encoder means when the machine shaft is positioned at an original point, a keyboard arrangement for inputting values of angles of starting and terminating points of the ON region for the output channel selected by the selecting means, and angle setting means for writing in the memory means the ON-OFF states of the output channel corresponding to the angular position of the machine shaft according to the angle value inputted from the keyboard arrangement.

4. A cycle timer as claimed in claim 3, wherein said output means comprises means for reading out from the memory means the ON-OFF states corresponding to the angular position of the machine shaft according to the angle information determined by both the original point correcting means and the encoder means, and an output device for outputting said ON-OFF data.

5. A cycle timer as claimed in claim 2, wherein said data setting means comprises first teaching means for writing in the memory means the angle information fed from the encoder means in response to the manual positioning of the machine shaft to a selected angle, as a starting point of the ON region of the output channel selected by the selecting means, second teaching means for writing in the memory means angle information fed from the encoder means in response to the manual positioning of the machine shaft to a selected angle, as a terminating point of the ON region of the output selected by the selecting means, and a keyboard arrangement for selecting one of the first and second teaching means.

6. A cycle timer as claimed in claim 5, wherein said data setting means further includes an original point correcting means for writing in the memory means angle information, as original condition correction data, which is obtained by the encoder means when the machine shaft is manually positioned at an original point.

7. A cycle timer as claimed in claim 2, wherein said data setting means comprises an original point correcting means for writing in the memory means the angle information, as original condition correction data, which is obtained by the encoder means when the machine shaft is manually positioned at an original point, a keyboard arrangement for inputting values of angles of starting and terminating points of the ON region for the output selected by the selecting means, first angle setting means for writing in the memory means the ON-OFF states of the selected output channel corresponding to the angle of the machine shaft according to the angle value inputted from a keyboard arrangement, first teaching means for writing in the memory means angle information, fed from the encoder means in response to the manual positioning of the machine shaft to a selected angle, as a starting point of the ON region of the output channel selected by the selecting means, second teaching means for writing in the memory means the angle information fed from the encoder means in response to the manual positioning of the machine shaft to a selected angle as a terminating point of the ON region of the output channel selected by the selecting means, a keyboard arrangement for selecting one of the first and second teaching means, and a second angle setting means for writing in the memory means the ON-OFF data of the output, corresponding to the angle of the machine shaft, according to both the angle information on the starting and terminating points of the ON region, which have been inputted from the first and second teaching means, respectively, and the original point correction data given by the correcting means.

8. A cycle timer as claimed in claim 2, wherein said data setting means includes an original point correcting means for writing in the memory means angle information, as original condition correction data, which is obtained by the encoder means when the machine shaft is manually positioned at an original point.