Apparatus and method for controlling servomotor of electric injection molding machine
US7915850B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2008 |
| Grant date | Mar 29, 2011 |
| Priority date | — |
| Expiry date | Jun 18, 2029 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2945/76929
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus and method for servomotors of an electric injection molding machine includes a motion controlling unit, two driving amplifying units, and two servomotors respectively connected to the driving amplifying units. The motion controlling unit includes two servomotor position controllers both for receiving a first position command, and the driving amplifying units are respectively connected to the servomotor position controllers for receiving a second and third position command. Two position detectors are respectively received in the two screw caps that are mounted to the servomotors for detecting absolute positions of the corresponding screw caps. The screw caps are respectively connected to inputs of the first and second servomotor position controllers to form two screw cap position feedback circuits. The values of the screw cap position feedback circuits are compared to the first position command for being input into the driving amplifying units to drive the corresponding servomotors to act synchronously.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.