Title:
TANDEM CONTROL SYSTEM FOR MACHINE TOOL AND METHOD FOR CONTROLLING SAME
Document Type and Number:
WIPO Patent Application WO/2021/125714
Kind Code:
A1
Abstract:
A tandem control system for a machine tool, according to the present invention, comprises: a numerical control unit; a main operation unit; a PLC which executes a control command via communication with the numerical control unit or the main operation unit; a servo drive which includes a notch filter unit and executes the control command from the PLC; a servo motor unit which is driven under the control of the servo drive; and a power conversion unit which is electrically connected to the servo motor unit and the servo drive so as to apply current to the servo motor unit, wherein the servo drive suppresses resonance due to the operation of the servo motor unit by controlling the application state of current transferred to the power conversion unit according to changes of notch filter coefficients calculated in real time at the notch filter unit.
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Inventors:
YUN CHUL (KR)
PARK JOOYONG (KR)
OH TAEHO (KR)
OH MYONGSU (KR)
PARK JOOYONG (KR)
OH TAEHO (KR)
OH MYONGSU (KR)
Application Number:
PCT/KR2020/018210
Publication Date:
June 24, 2021
Filing Date:
December 11, 2020
Export Citation:
Assignee:
DOOSAN MACHINE TOOLS CO LTD (KR)
International Classes:
H02P23/04; B23Q1/00; B23Q11/00; G05B19/05; H02P5/74
Foreign References:
| JP6049587B2 | 2016-12-21 | |||
| US20070007926A1 | 2007-01-11 | |||
| JP2019080424A | 2019-05-23 | |||
| KR101757267B1 | 2017-07-13 | |||
| KR101708739B1 | 2017-02-21 |
Other References:
See also references of EP 4060891A4
Attorney, Agent or Firm:
KIM, Hosung (KR)
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