EP0116677A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Stepping motor drive circuit
Assignee: Toshiba TEC Corp
•
Filing: 1983-06-30
•
Granted: —
•
Expires: 2003-06-30
Abstract
Abstract A motor drive circuit includes ROM (2) in which a plurality of driving speed patterns are stored, a RAM (4) for storing step data indicative of the number of driving rotational steps, and a data processing circuit (1, 10) for supplying motor driving data to a motor control unit (14) in accordance with one of the driving speed patterns selected on the basis of the step data in the RAM (4). A series of step timing data is included in each of the driving speed patterns. The data processing circuit sequentially reads out the series of step timing data related to the selected driving speed pattern from the ROM (2) and supplies the motor driving data to the motor control unit each time the period of time corresponding to this read-out step timing data elapses.
Inventors
- 👤 Tsuyoshi Matsushita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 19:51
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/416; G05B19/19; G05B19/40; H; H02; H02P; H02P23/00; H02P23/20; H02P8/00; H02P8/14; G05B2219/00; G05B2219/30; G05B2219/43; G05B2219/43088; G05B2219/43093
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
A stepping motor drive circuit comprising: first memory means (2) in which a plurality of driving speed patterns are stored; second memory means (R2) for storing step data indicative of the number of driving rotational steps; motor driving means (14); and a data processing circuit (1, 10, Rl, R3; 1, 10, 20 to 22) which selects one of the driving speed patterns on the basis of the step data stored in said second memory means (R2) and which supplies motor driving data to said motor driving means (14) in accordance with the driving speed pattern selected, characterized in that each of said driving speed patterns includes a series of step timing data, and said data processing circuit (1, 10, Rl, R3; 1, 10, 20 to 22) sequentially reads out the series of step timing data of said selected driving speed pattern from said first memory means (2) and supplies motor driving data to said motor driving means (14) each time the period of time corresponding to said step timing data read out elapses.
Claim 2
Dependent Claim
173 words
A stepping motor drive circuit comprising: first memory means (2) in which a plurality of driving speed patterns are stored; second memory means (R2) for storing step data indicative of the number of driving rotational steps; motor driving means (14); and a data processing circuit (1, 10, Rl, R3; 1, 10, 20 to 22) which selects one of the driving speed patterns on the basis of the step data stored in said second memory means (R2) and which supplies motor driving data to said motor driving means (14) in accordance with the driving speed pattern selected, characterized in that each of said driving speed patterns includes a series of step timing data, and said data processing circuit (1, 10, Rl, R3; 1, 10, 20 to 22) sequentially reads out the series of step timing data of said selected driving speed pattern from said first memory means (2) and supplies motor driving data to said motor driving means (14) each time the period of time corresponding to said step timing data read out elapses.
Claim 3
Dependent Claim
100 words
A motor drive circuit according to claim 1, characterized in that said data processing circuit comprises time counting means (10) for generating an output signal when the time period corresponding to the timing data set therein has elapsed; and data processing means (1, Rl, R3; 1, 20 to 22) which supplies the motor driving data to said motor driving means (14) in response to the output signal from said time counting means (10) and which reads out the next step timing data from said first memory means (2) and sets the step timing data into the time counting means (10).
Claim 4
Dependent Claim
48 words
A motor drive circuit according to claim 2, characterized in that said first memory means (2) includes a memory area having address locations to store the address data indicative of the respective reference addresses of said driving speed patterns, the address locations being designated by said step data.
Claim 5
Dependent Claim
97 words
A motor drive circuit according to claim 3, characterized in that said data processing means comprises third memory means (R3; 20) for storing the address data read out from said first memory means (2); and fourth memory means (Rl; 21) whose contents are sequentially changed in a single direction each time the output signal is generated from said time counting means (10), and said data processing meand reads out the corresponding step timing data from said first memory means (2) using the sum of the contents in said third and fourth memory means as an address signal.
Claim 6
Independent Claim
104 words
A method of driving a stepping motor comprising the steps of: storing a plurality of driving speed patterns in a memory; selecting one of the driving speed patterns corresponding to step data indicative of the number of driving rotational steps; and step-driving said stepping motor according to said driving speed pattern'selected, characterized in that each of said driving speed patterns includes a series of step timing data, said series of step timing data related to said selected driving speed pattern are sequentially read out, and the stepping motor is step-driven with the timing determined on the basis of said step timing data read out.
Claim 7
Independent Claim
104 words
A method of driving a stepping motor comprising the steps of: storing a plurality of driving speed patterns in a memory; selecting one of the driving speed patterns corresponding to step data indicative of the number of driving rotational steps; and step-driving said stepping motor according to said driving speed pattern'selected, characterized in that each of said driving speed patterns includes a series of step timing data, said series of step timing data related to said selected driving speed pattern are sequentially read out, and the stepping motor is step-driven with the timing determined on the basis of said step timing data read out.
References Cited (Backward Citations)
US3986094A
Cited
US4268783A
Cited
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.