Senior Design System Level Design Review Notes

Taken by Whitney Domigan

Jan. 16, 2009

Note- These notes are slightly edited. I’m just putting in comments or questions that we have not necessarily thought about or thought about recently,

Speakers:

N- Bill Nowak

K- John Knapp

  1. K- Slide 15- Question: what other technologies/applications use pressure rolling? Paper making, rolling out steel
  2. K- Question: is there less roller precision needed with the addition of the 3rd/4th rollers?
  3. K- Suggestion: look at rejected round 1 PUGH designs for possible test fixtures to see how fusing works @ different pressures.
  4. N- airbag would actually have good uniformity, just problems with the pressure generation and creating a bag that can withstand the pressure
  5. Slide 19

N- still have uniformity issues

K- what if we have larger top rollers?

N- use of cross rollers

K- issues arising from 2 paper feedsFuser edge wear a big issue

N- look into spring rates, how they effect uniformity

  1. N- Paper analysis with different feeds have different E values
  2. K- paper makes a big difference, look into different paper properties, may need more force than currently estimated for some types of paper
  3. N- We need a plan for how we will make better numbers for the power analysis. How will different loads affect it?
  4. K- look at Energy Star requirements for comparison between our and thermal fuser machines (EPA regulations)
  5. N- really need fatigue analysis
  6. N- if torque ends up more than 2x than current fuser we will probably shear the gears in the drive train. Xerox can help us find out what that torque is.
  7. K- if the module doesn’t fit it could be a mod to the printer
  8. K- our printer goes from 35-90 ppm- there are a lot of them out there so its possible that larger modifications could be made. maybe just use pressure mod as an add on and give user the option of using either
  9. K- problem with adding too many modifications is that it adds to product dev. time
  10. N- use common materials (steel, a plastic with a high E) to lower cost
  11. N- look online for bearings and loss calculations
  12. K- friction will be important when looking at materials
  13. N- will want to eventually calculate the cost for production (est. materials and what they will cost. ex $1/lb steel)
  14. N- the spring loading will be the biggest challenge
  15. For slide 26/27

K- these aren’t necessarily risks to the project. we will still be successful if we decide it can’t fit in the machine and explain why

N- Get a basic functional design before we get into more specific analyses

N- consider where we will build, what the capabilities of the machine shop are, what it will cost, lead times, etc.

K- need high tolerances for rollers (?). will get us info that Xerox has on the subject

N- Need to understand manufacturing costs by the end of this term (projected costs)

  1. N- will try to at least provide the equations used in the roller analysis code so that we can make our own code.
  2. K- Jerry Demoto should talk to us about our project for help with analysis.