Stiffness Measurement Applied

to the iGEN4

Presented by Michael Joseph, Peter Zaki, and Jay Yen

1.Title2.Table of Contents3. Mission Statement4. Stiffness the old fashioned way5. Problem Statement: Innovation6. The Importance of Stiffness7. Screening matrix 8. Slides 8-11: Prototype ideas12. Weighted Matrix13.-14. Final Solution15. Conclusion 16. Resources 1 7.Questions

Table of Contents

To enhance the printing capabilities of the

iGEN4 printer by designing a sensing device that will detect the variable bending stiffness of an 8.5”x11” sheet of paper moving through a simple paper path at a speed of 250mm/s to 750mm/s.

The solution needs to be socially, economically, and environmentally sustainable.

The Goal is to Measure Paper Stiffness

Stiffness the old fashioned way

Tensile Stiffness

Bending Stiffness

Equivalent stiffness

Currently, the stiffness is measured by:

Using off-line samples Done manually and slowly Cannot provide feedback during manufacturing

There is a need for a device to measure stiffness in real time because the current process is time consuming and can be error prone.

Innovation

Pieces of paper with various stiffness change in travel

time through the printer path. As they move through the printing path, stiff paper “cuts the corner” around a bend, while less stiff paper travels a farther distance.

Unaccounted differences in stiffness could be the difference between a registered image and an unregistered image.

Stiffness Does Matter

Selection Criteria

modified film Sensor After First Roller

Modular Component Above Simple Paper Path

Ultrasonic Sensor after first roller

Multiple Rollers

Ease of Use + + + +Cost of Production - - - -Manufacturability (technologically appropriate)

- 0 + -

Environmental Impact

0 0 0 -

Durability + + + +Effectiveness + + + 0Number of +’s 3 3 4 2Number of 0’s 1 2 1 1Number of –’s 2 1 1 3Net +1 +2 +3 -1Rank 3 2 1 4Continue? Yes Yes Yes No

Screening MatrixConcept Variants

Currently uses a dualLaser system to measureProperties of film. (thick-ness, width, etc.) Modify dual laser systemto calculate the change in thickness of the paper.

Converted Film Sensor

Scaled down version of the sensor made to

measure the bending stiffness of an 8.5” x11” sheet of paper after the first roller.

Ultrasonic Sensor after the first roller

Ultrasonic sensor sits above paper. Scaled down to measure An 8.5” x 11”

piece of paper. Measurement is completely automated.

Modular component

A series of rollers where the rollers act as the

guiding baffle.

Multiple Rollers

Weighted Matrix

Conceptsmodified Film Sensor After First Roller

Modular Component Above Simple Paper Path

Ultrasonic Sensor preceding first roller

Selection Criteria Weight Rating Weighted Score

Rating Weighted Score

Rating Weighted Score

Ease of Use 20% 5 1.0 5 1.0 5 1.0Cost of Production 15% 3 0.45 4 0.60 3 0.45

Manufacturability (technologically appropriate)

20% 2 0.40 4 0.80 3 0.60

Environmental Impact

15% 2 0.30 3 0.45 2 0.30

Durability 15% 2 0.30 3 0.45 2 0.30Effectiveness 15% 5 0.75 5 0.75 5 0.75

Total Score 3.20 4.05 3.40Rank 3 1 2

Continue? No Develop No

The Modular Component

A transducer sends a sound wave with a high frequency to a receiver.

The sound wave is distorted as it travels through a medium.

The echo that is received is used to determine

the distance between the sensor and the paper.

Knowing these values leads to the evaluation of stiffness.

The Modular Component

The Modular component:

Real time data to help prevent misprints Relieves old method of measurement Easy installation. No extensive alterations Measuring and printing process completely

automated

Conclusion

http://nanocpi.gatech.edu/carson/paper3.pdf

http://sedtapp.psu.edu/design/design_projects/edsgn100/fa11/Xerox%20Project%20Statement.pdf

http://www1.eere.energy.gov/industry/forest/pdfs/laser_ultrasonics.pdf

http://sensors.lbl.gov/st_laser.html

http://www.ndt-ed.org/EducationResources/HighSchool/Sound/ultrasound.htm

http://picaxe.hobbizine.com/srf05.html

Resources

Questions

Please feel free to ask any questions at this time.