Recording apparatus
US5334920A · kind A · utility
96Cited by
8References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1991 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Jun 7, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P8/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A recording apparatus which has reduced the speed variation and vibration of the motor uses a step motor as a driving source for a carrier for carrying a carriage mounted with a recorder or a recording medium. The apparatus includes a controller that, on accelerating the step motor, controls the step motor so that the step motor is driven with a shorter period than the mechanical time constant of the carrier when the rotary speed of the motor is less than a specified value, and so that the motor is driven with a longer period than the mechanical time constant when the rotary speed of the motor is more than the specified value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.