Inventors:
David P. Souza - Fall River MA
Assignee:
Battenfeld Gloucester Engineering Co., Inc. - Gloucester MA
International Classification:
G05B 19401
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.