Digital speed controlling apparatus, digital motor controlling apparatus, paper conveying apparatus, digital speed control method, program for making computer execute this method, computer-readable recording medium, and imaging forming apparatus
US7208902B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2006 |
| Grant date | Apr 24, 2007 |
| Priority date | — |
| Expiry date | Jun 7, 2026 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J29/38
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A digital speed controlling apparatus includes: a target speed calculator that calculates a target speed of a driven conveyor belt, based on a sampling time; a current speed calculator that calculates a current speed of the conveyor belt, based on displacement and a difference of a sampling time; a target speed determining unit that determines whether a target speed is smaller than a predetermined value; a speed corrector that replaces the current speed with a set value, when the target speed is smaller than the predetermined value and also when the current speed is the minimum unit displacement per the sampling cycle; a speed error calculator that calculates an error between a replaced set value and the target speed; and an automatic controller that controls the drive motor based on a speed error.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.