Load wrapping apparatus with rotational data shift

Patent metadata

Field	Value
Publication number	US-11111046-B2
Application number	US-201816017620-A
Country	US
Kind code	B2
Filing date	Jun 25, 2018
Priority date	Oct 25, 2012
Publication date	Sep 7, 2021
Grant date	Sep 7, 2021

Abstract

A wrapping apparatus and method utilize a rotational data shift to a wrap speed model to offset system lag.

First claim

What is claimed is:

1. An apparatus for wrapping a load with packaging material, the apparatus comprising:
a packaging material dispenser for dispensing packaging material to the load;
a rotational drive system configured to generate relative rotation between the packaging material dispenser and the load about a center of rotation; and
a controller that controls a dispense rate of the packaging material dispenser during the relative rotation based upon a wrap speed model, wherein the controller offsets system lag by applying a rotational data shift to the wrap speed model to advance the wrap speed model to an earlier point in time or rotational position.

2. The apparatus of claim 1 , wherein the controller applies the rotational data shift by shifting sensed data used by the wrap speed model.

3. The apparatus of claim 2 , wherein the controller shifts the sensed data by shifting a rotational position of the load.

4. The apparatus of claim 3 , further comprising an angular sensor configured to sense the rotational position of the load relative to the packaging material dispenser about the center of rotation, wherein the controller shifts the rotational position by increasing the sensed rotational position.

5. The apparatus of claim 1 , wherein the controller determines a corner contact angle for a corner of the load, and applies the rotational shift by shifting the determined corner contact angle.

6. The apparatus of claim 5 , wherein the controller shifts the determined corner contact angle by decreasing the determined corner contact angle.

7. The apparatus of claim 1 , wherein the controller determines the system lag.

8. The apparatus of claim 1 , wherein the controller determines a geometry of the load during an initial revolution of the load relative to the packaging material dispenser.

9. The apparatus of claim 1 , wherein the rotational data shift aligns a phase of a profile of an actual dispense rate of the packaging material dispenser with that calculated using the wrap speed model.

10. The apparatus of claim 1 , wherein the wrap speed model is an effective circumference-based wrap speed model.

11. The apparatus of claim 1 , wherein the controller varies an amount of the rotational data shift based upon an operating condition of the apparatus.

12. The apparatus of claim 11 , wherein the controller varies the amount of the rotational data shift based upon a wrapping speed.

13. An apparatus for wrapping a load with packaging material, the apparatus comprising:
a packaging material dispenser for dispensing packaging material to the load;
a rotational drive system configured to generate relative rotation between the packaging material dispenser and the load about a center of rotation; and
a controller that controls a dispense rate of the packaging material dispenser during the relative rotation based upon a wrap model, wherein the controller offsets system lag by applying a rotational data shift to the wrap model to advance the wrap model to an earlier point in time or rotational position.

14. The apparatus of claim 13 , wherein the wrap model is an effective circumference-based wrap speed model.

15. The apparatus of claim 13 , wherein the wrap model is a wrap force model.

16. An apparatus for wrapping a load with packaging material, the apparatus comprising:
a packaging material dispenser for dispensing packaging material to the load;
a rotational drive system configured to generate relative rotation between the packaging material dispenser and the load about a center of rotation; and
a controller that controls a dispense rate of the packaging material dispenser during the relative rotation based upon a predicted demand for packaging material at each of a plurality of rotational positions of the load about the center of rotation, wherein the controller further determines a corner contact angle about the center of rotation for a corner of the load and applies a rotational data shift to the corner contact angle to offset system lag, wherein the rotational data shift shifts the corner contact angle to an earlier rotational position.

17. An apparatus for wrapping a load with packaging material, the apparatus comprising:
a packaging material dispenser for dispensing packaging material to the load;
a rotational drive system configured to generate relative rotation between the packaging material dispenser and the load about a center of rotation; and
a controller that controls a dispense rate of the packaging material dispenser during the relative rotation based upon a predicted demand for packaging material at each of a plurality of rotational positions of the load about the center of rotation, wherein the controller further determines a current rotational position of the load about the center of rotation and applies a rotational data shift to the current rotational position to offset system lag, wherein the rotational data shift shifts the current rotational position to a later rotational position.

18. An apparatus for wrapping a load with packaging material, the apparatus comprising:
a packaging material dispenser for dispensing packaging material to the load;
a rotational drive system configured to generate relative rotation between the packaging material dispenser and the load about a center of rotation; and
a controller that controls a dispense rate of the packaging material dispenser during the relative rotation based upon a wrap model, wherein the controller offsets system lag by applying a variable rotational data shift to the wrap model by varying the rotational data shift based at least in part upon a rate of relative rotation between the packaging material dispenser and the load.

19. The apparatus of claim 18 , wherein the controller applies the variable rotational data shift further based at least in part upon a fixed component of system lag.

20. A program product, comprising:
a computer readable medium; and
program code configured upon execution by a controller in an apparatus that wraps a load with packaging material using a packaging material dispenser adapted for relative rotation with the load about a center of rotation, wherein the program code is configured to control a dispense rate of the packaging material dispenser during the relative rotation based upon a wrap speed model, and to offset system lag by applying a rotational data shift to the wrap speed model, wherein the program code determines a corner contact angle for a corner of the load, and applies the rotational shift by shifting the determined corner contact angle.

21. A method of wrapping a load with packaging material, the method comprising:
controlling a dispense rate of a packaging material dispenser during relative rotation between the packaging material dispenser and the load about a center of rotation based on a wrap speed model; and
offsetting system lag by applying a rotational data shift to the wrap speed model, wherein the rotational data shift aligns a phase of a profile of an actual dispense rate of the packaging material dispenser with that calculated using the wrap speed model.

22. The method of claim 21 , wherein applying the rotational data shift includes shifting sensed data used by the wrap speed model.

23. The method of claim 22 , wherein shifting the sensed data includes shifting a rotational position of the load.

24. The method of claim 23 , further comprising sensing the rotational position of the load relative to the packa

Assignees

• Lantech Com Llc

Inventors

• Lancaster Iii Patrick R
• Mitchell Michael P
• Mccray Jeremy D
• Johnson Richard L

Classifications

• B65B11/025 Primary

  by webs revolving around stationary articles · CPC title

• B65B57/04 Primary

  and operating to control, or to stop, the feed of such material, containers, or packages · CPC title

• B65B11/045

  by rotating platforms supporting the articles · CPC title