US3774100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turret indexing motor control system
Assignee: Strippit Di Acro Houdaille Inc
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Filing: 1971-08-09
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Granted: 1973-11-20
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Expires: 1991-08-09
Abstract
Abstract An indexing control system for a rotatable turret punching press where tool stations have different indexing distances therebetween and a read only memory stores the number of indexing pulses required to index between each pair of adjacent stations. A position register functions to provide a present position value at the beginning of each indexing operation and also serves to control readout from the memory of the number of indexing pulses required to execute a new command. The total number of indexing pulses required for indexing movement in a given direction may be accumulated and then used to control the actual indexing movement of the turret (and also the direction of indexing movement, if desired).
Inventors
- 👤 J Barber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:48
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/19; G05B19/21; G05B19/23; G05D; G05D1/00; G05D1/08; G05D1/0808; G05D1/0858; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41326; G05B2219/42; G05B2219/42212; G05B2219/50; G05B2219/50047; Y; Y10; Y10T; Y10T29/00; Y10T29/51; Y10T29/5104; Y10T29/5105; Y10T29/5107; Y10T483/00; Y10T483/12; Y10T483/123; Y10T483/127; Y10T483/17; Y10T483/1729; Y10T483/1731
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
343 words
The method of controlling indexing of a load between successive stations some of which have different spacing therebetween, the stations being assigned sequential station numbers, said method comprising providing a plural stage position counter operable to register sequential plural order count values each corresponding to one of said sequential station numbers in response to respective signal pulses supplied thereto, and establishing in said position counter a plural order count value corresponding to one of a present station number corresponding to a present station at which the load is presently positioned and a commanded new station number corresponding to a new station to which the load is to be indexed, supplying successive single pulses to the position counter to step the position counter to successive count values corresponding to the station numbers between said present station number and said new station number, deriving plural order coded digital station number signals from said plural stage position counter as each sequential plural order count value is registered therein and supplying said plural order coded digital station number signals from said plural stage position counter in accordance with the successive corresponding count values registered therein to a memory readout circuit for generating in response thereto a number of different distance selection signals not less than the number of different spacings between successive stations, with each distance selection signal being generated only in response to station number signals representing stations having the same spacing from respective adjacent stations, and supplying the respective distance selection signals so generated to respective inputs of a memory circuit to read from said memory circuit respective indexing distance numbers all substantially exceeding the highest station number assigned to said stations and proportional to the respective spacings between the stations corresponding to the supplied station number signals and said respective adjacent stations, the sum of said indexing distance numbers so read from said memory circuit being proportional to an indexing distance from the present station to the new station, and being utilized to control the indexing movement of the load to the new station.
Claim 2
Independent Claim
343 words
The method of controlling indexing of a load between successive stations some of which have different spacing therebetween, the stations being assigned sequential station numbers, said method comprising providing a plural stage position counter operable to register sequential plural order count values each corresponding to one of said sequential station numbers in response to respective signal pulses supplied thereto, and establishing in said position counter a plural order count value corresponding to one of a present station number corresponding to a present station at which the load is presently positioned and a commanded new station number corresponding to a new station to which the load is to be indexed, supplying successive single pulses to the position counter to step the position counter to successive count values corresponding to the station numbers between said present station number and said new station number, deriving plural order coded digital station number signals from said plural stage position counter as each sequential plural order count value is registered therein and supplying said plural order coded digital station number signals from said plural stage position counter in accordance with the successive corresponding count values registered therein to a memory readout circuit for generating in response thereto a number of different distance selection signals not less than the number of different spacings between successive stations, with each distance selection signal being generated only in response to station number signals representing stations having the same spacing from respective adjacent stations, and supplying the respective distance selection signals so generated to respective inputs of a memory circuit to read from said memory circuit respective indexing distance numbers all substantially exceeding the highest station number assigned to said stations and proportional to the respective spacings between the stations corresponding to the supplied station number signals and said respective adjacent stations, the sum of said indexing distance numbers so read from said memory circuit being proportional to an indexing distance from the present station to the new station, and being utilized to control the indexing movement of the load to the new station.
Claim 3
Dependent Claim
69 words
The method of claim 1 wherein the successive stations are arranged in a closed loop path, with the supply of pulses to the position counter stepping the position counter in one counting direction between successive count values for indexing of the load in one direction and stepping the position counter to successive count values in an opposite counting direction for indexing of the load in an opposite indexing direction.
Claim 4
Dependent Claim
73 words
The method of claim 2 wherein a register is provided having a capacity proportional to substantially one half the indexing distance about said closed loop path, said method further comprising supplying a number of pulses to said register generally proportional to the distance from the presenT station to the new station in a given indexing direction, and controlling actual indexing movement in the opposite direction if the capacity of said register is exceeded.
Claim 5
Dependent Claim
30 words
The method of claim 3 wherein the direction of stepping of the position counter is controlled in accordance with whether the capacity of the register is or is not exceeded.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |