Title:
OBJECT PROCESSING SYSTEM INCLUDING A CONVEYOR BELT
Document Type and Number:
WIPO Patent Application WO/2018/097717
Kind Code:
A3
Abstract:
An object processing system includes a conveyor belt (2), a stationary processing unit (5) to process an object on the conveyor belt, and a control unit (7) to control the movement of the conveyor belt to position the object at the processing unit and to trigger action of the processing unit. The conveyor belt is provided in its conveying direction with an encoder scale (9). The system includes a position encoder comprising two encoder heads (11, 12) at a distance (denc) from each other along the conveying direction to observe the encoder scale. An encoder signal processing unit (13) is connected to the encoder heads and to the control unit. The encoder signal processing unit is suitable to receive encoder signals (14, 15) from the respective encoder heads and to generate a belt position signal (16) derived from the encoder signals. The belt position signal serves as an input signal for the control unit. The encoder signal processing unit is programmed to determine a thermal expansion correction factor and to calculate the belt position signal using the thermal expansion correction factor such that the belt position signal comprises a fixed number of encoder pulses over the distance (denc) between the two encoder heads.
Inventors:
VAN OOIK GERT (NL)
PULLES ROB (NL)
PULLES ROB (NL)
Application Number:
PCT/NL2017/050766
Publication Date:
September 07, 2018
Filing Date:
November 23, 2017
Export Citation:
Assignee:
CCM BEHEER BV (NL)
International Classes:
B65H5/02; B65H5/22; B65H7/14
Foreign References:
| EP3028969A1 | 2016-06-08 | |||
| EP1522414A1 | 2005-04-13 | |||
| US20050078015A1 | 2005-04-14 | |||
| US20060061612A1 | 2006-03-23 | |||
| US5300961A | 1994-04-05 |
Attorney, Agent or Firm:
HOUBEN, C.H.W.F. (NL)
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