Method for initializing the position of a linear drive system
US5638268A · kind A · utility
4Cited by
5References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1994 |
| Grant date | Jun 10, 1997 |
| Priority date | — |
| Expiry date | Nov 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/50038
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A thermoplastic bag making machine having a sealing bar assembly driven by two separate linear drive units is initialized following full shutdown by traversing the linear drive units at constant velocity against mechanical stops, and then resetting position error signals and traversing the bar a known distance to a home position. This procedure is also useful for single linear drive units, as well as multiple linear drive units that must be coordinated for position and motion. In the case of multiple drive units, procedure for offsetting travel distances off the stop for non-uniformity in stop positions is utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.