Method and apparatus for driving a stepping motor using digital pulse trains simulating sine and cosine waves
US5915861A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1997 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Oct 7, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S400/903
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The method for driving a stepping motor for printers comprises the generation of first pulses (16A,16B) at n levels recorded in registers and representing a simulation of sinusoidal waves. The maximum level is applied during two consecutive microsteps to one of the phases of the motor, while the level of the other phase changes sign. During a motor stopping command, second pulses (VCA,VCB) are applied to the registers and to the two phases of the motor and are programmed so as to ensure, during the last microstep, an exact stopping position, such that all the stopping positions are kept apart by a whole number of half steps. Very precise, fast and noise-free printing is thus attained. The resolution is doubled, without any loss of precision or speed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.