GB1404774A - Controlling a stepping motor by a variable frequency oscillator - Google Patents
Controlling a stepping motor by a variable frequency oscillatorInfo
- Publication number
- GB1404774A GB1404774A GB4265572A GB4265572A GB1404774A GB 1404774 A GB1404774 A GB 1404774A GB 4265572 A GB4265572 A GB 4265572A GB 4265572 A GB4265572 A GB 4265572A GB 1404774 A GB1404774 A GB 1404774A
- Authority
- GB
- United Kingdom
- Prior art keywords
- counter
- oscillator
- motor
- value
- controller
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
- G05B19/40—Open loop systems, e.g. using stepping motor
Abstract
1404774 Automatic control of movement ELEKTROMAT VEB 14 Sept 1972 42655/72 Heading G3N [Also in Division H2] A stepping motor 4 is controlled by a circuit comprising a variable frequency oscillator 1, a controller 3, a reversible counter 2 and a variable impedance network 5, the arrangement being such that the oscillator frequency is determined by the state of the counter 2 whose outputs 2‹ - - - 2n control respective switching transistors To - - - T n of the network 5 to vary the conductance G of the latter and hence the time constant of the oscillator. The controller 3 includes a pulse-shaping unit, a reference counter, comparator and coincidence stages, a pulse distributor and a pulse amplifier feeding the windings of the motor 4. Members 2, 3 receive a squarewave pulse train from the oscillator 1 and the controller 3 sets a predetermined pulse value a corresponding to a desired number of motor steps, for example as obtained from a punched tape. In a typical operation involving acceleration, constant speed running and braking of the motor, pulses are fed to members 2, 3 and the oscillator frequency progressively increases until the reference counter reaches a value b, whereupon the controller 3 stops the counter 2. The motor then runs at a speed dependent on the value b (in counter 2) and fixed and variable oscillator time constants dependent on elements R', C', R"' and G, C". The reference counter counts up to a value a/2 and then counts down. When a count value (a-b) has been reached, the counter 2 is restarted I in the reverse direction and the oscillator frequency progressively decreases until both counters simultaneously reach zero and the motor stops. Thus the frequency/time characteristics for acceleration and braking are mirror symmetrical, Fig. 2 (not shown). If b is greater than a/2, there is no steady speed condition since the counter is not stopped but counts down with the reference counter when its value reaches a/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4265572A GB1404774A (en) | 1972-09-14 | 1972-09-14 | Controlling a stepping motor by a variable frequency oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4265572A GB1404774A (en) | 1972-09-14 | 1972-09-14 | Controlling a stepping motor by a variable frequency oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1404774A true GB1404774A (en) | 1975-09-03 |
Family
ID=10425395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4265572A Expired GB1404774A (en) | 1972-09-14 | 1972-09-14 | Controlling a stepping motor by a variable frequency oscillator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1404774A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0026785A1 (en) * | 1979-04-10 | 1981-04-15 | Sigma Instruments, Inc. | Phase locked loop control system |
| EP1717943A3 (en) * | 2005-04-27 | 2008-07-30 | Saia-Burgess Dresden GmbH | Method for controlling a step-motor as noise limited valve drive |
| RU2526855C1 (en) * | 2013-01-09 | 2014-08-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" | Multifunctional distributor for step motor control |
-
1972
- 1972-09-14 GB GB4265572A patent/GB1404774A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0026785A1 (en) * | 1979-04-10 | 1981-04-15 | Sigma Instruments, Inc. | Phase locked loop control system |
| EP0026785A4 (en) * | 1979-04-10 | 1982-06-14 | Sigma Instruments Inc | Phase locked loop control system. |
| EP1717943A3 (en) * | 2005-04-27 | 2008-07-30 | Saia-Burgess Dresden GmbH | Method for controlling a step-motor as noise limited valve drive |
| RU2526855C1 (en) * | 2013-01-09 | 2014-08-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" | Multifunctional distributor for step motor control |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |