Device for printing on at least one region of the surface of an object

Patent metadata

Field	Value
Publication number	US-2016229208-A1
Application number	US-201615040171-A
Country	US
Kind code	A1
Filing date	Feb 10, 2016
Priority date	Feb 11, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

A device for printing on at least one region of a surface of a so-called 3D object, for instance a curved auto body part, includes a manipulator, for instance an articulated-arm robot with six degrees of freedom. The device also includes a system for vibration compensation for the print head. The system includes an active component and a passive component. Manipulator vibration which creates defects in a printed image may thus be effectively avoided.

First claim

1 . A device for printing on at least one region of a surface of an object, the device comprising:
a manipulator; a print head associated with said manipulator; and a system for vibration compensation for said print head, said system including an active component and a passive component.

2 . The device according to claim 1 , wherein said active component compensates for low-frequency vibration, and said passive component compensates for high-frequency vibration.

3 . The device according to claim 2 , wherein the low-frequency vibration includes vibration frequencies below a frequency threshold.

4 . The device according to claim 2 , wherein the high-frequency vibration includes vibration frequencies above a frequency threshold.

5 . The device according to claim 2 , wherein said active component includes an active vibration damper with a mass element and an actuator for moving said mass element.

6 . The device according to claim 5 , wherein said actuator is a linear motor or a plunger coil.

7 . The device according to claim 2 , wherein said active component is disposed on said print head or on said passive component or on said manipulator.

8 . The device according to claim 2 , wherein said system for vibration compensation includes at least one sensor for measuring vibration of said print head.

9 . The device according to claim 8 , wherein said system for vibration compensation includes a controller and an amplifier connected to said controller, said controller having an input connected to said sensor, and said amplifier having an output connected to said active component.

10 . The device according to claim 2 , wherein said passive component includes a connecting piece for fixing said print head to said manipulator.

11 . The device according to claim 10 , wherein said connecting piece is constructed as a parallelogram suspension.

12 . The device according to claim 10 , wherein said print head and said connecting piece together have a natural frequency being lower than a lowest natural frequency of said manipulator being relevant for a printed result.

Assignees

• Heidelberger Druckmasch Ag

Inventors

• Neeb Steffen
• Stenzel Roland

Classifications

• B41J19/06

  Resilient mounting of mechanism · CPC title

• B41J3/4073 Primary

  Printing on three-dimensional objects not being in sheet or web form, e.g. spherical or cubic objects (B41J3/283, B41J3/286 take precedence; building up a 3D object using individual droplets from jetting heads B29C64/112) · CPC title

• B41J29/26 Primary

  Devices, non-fluid media or methods for cancelling, correcting errors, underscoring or ruling · CPC title