Methods of operating a pump to reduce or eliminate pump backlash errors
US11242848B2 · kind B2 · utility
0Cited by
8References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2019 |
| Grant date | Feb 8, 2022 |
| Priority date | — |
| Expiry date | Jul 9, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/43193
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of operating a pump can include advancing a stepper motor one or more additional steps in a first direction after detecting a first change in a limit sensor state corresponding to a piston reaching an end of its travel in a first direction. After advancing the stepper motor the additional step or steps in the first direction, the stepper motor can be reversed and advanced in a second direction until a second change in the limit sensor state is detected. The stepper motor can then be advanced in the second direction a predetermined number of steps associated with a full travel of the piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.