home

Just to let everybody know, the FFR has been handed in! Good luck on your exams.

- Mike

TADAAAA ITS FINISHED (sort of)

Integration is still missing, but since Mike your going to print it you can cut and paste it in there (match the formatting). Just please finish the page numbering in the table of contents! Also print of the data sheets you desire for the Appendix.

Overall I think the paper is good with plenty of engineering analysis, 21pgs. I definitely added some content and structure to everybody's sections for completeness. Honestly I'm sure we could go into way more detail in most of these areas but I understand we are all extremely limited on time. Hopefully the marking is as lenient as usual. Pretty sure we're right on track so Good Work Team!!



Also Extra thanks to Mike for printing this sucker. Your'e the man!

Merry Christmas Everybody, Happy New Year, and good luck on exams!!!

William

P.S. Dont forget to print two copies

Grrr, I swear it was there this morning when I checked!!! haha Anyways, here is the linear motor architecture below, William Thanks Mike for volunteering, Ashton



Hey William,

I can print it out tomorrow. I either have access to a lab for free printing at school, or just at home.

- Mike

IMPORTANT UPDATES FROM CHIEF EDITOR:

1) The system architecture for the linear motor is still not on the wiki need ASAP Ashton or Andrew!!!

2) My printer seems to be printing faded pics and text (low ink?), If any one would like to volunteer to print this sucker so it is crisp (or save me the $$ of printing at the library) Please speak now! You will have the Document before you wake up tomorrow Promise! (that is assuming you sleep of course).

3) Nicole you referenced a Decision matrix for the Appendix but never gave me one!! Update me or I'll have to remove the text.

William

Hello Guys,

So there wasn't much to take from the question period (Thanks Dr. Li... He messed up the question period for my other presentation too, it was amusing). But here it is:

Linear Motor Considerations: Safety- further consideration of the earth magnet and magnetic field Movement- Move magnet rather than forcer

Safety Treadmill safety- cleary should be our #1 priority...

THats about all, but I think it went well!

Good luck with finals etc guys! -Nici



View our external team webpage here! More stuff for the report:
 * Work in progress: Fall Final Report, Design Review Prep.**

write up:

integration is still a work in progress...

spec sheets: for the stepper motor driver, only pages 5&6 apply.

- Mike

Stuff for the report:

And for the DR: -Mitch

Some updates on motor sourcing. I had a good talk with Tom Shay at Electromate today. He is going to provide us with rough estimates for the linear shaft motor, linear scale encoder, and motor drive by tomorrow or Thursday.

I also got an e-mail back from Tecnotion about the more typical linear motors. They have one that will work. I'm just waiting to hear back for an estimate. They however do not sell the encoders and motor drivers etc.

Here is a picture of the SolidWorks model for the linear motor if we used the linear shaft motor.

Andrew

Hey all, This is just a friendly reminder to get your slides ready and sent to me soon!! Thanks, Ashton

Here is my updated part of the report:

Hey Guys, Here is the chart for different options on size and specifications. The constant force I rounded to 7.5 N. It looks like it may be easier to maintain a constant force between 1.5 and 4 Hz, rather than from 1 Hz. If we go from 1 there is huge changes in the stroke. Also we have some leeway with what kind of mass we want, but that will affect the required stroke as well. Take a look, use what is necessary to justify each motor. I also think this should be placed in an appendix of the report.

Nicole

Hello,

The acceleration determined from the testing (estimated amplitude 7 cm, frequency about 1.5 Hz) was 3.11 m/s2. Added to 4.5 m/s2 we have 7.61m/s2 for peak acceleration. With 1 kg thats 7.61 N of force.

I will post a spreadsheet with mass/dimension options for different frequencies but that gives our peak force goal. We could round it either to 7.5 or 8 N, as the testing was not that accurate, just a rough guide.

-Nicole

For Nicole and Andrew and anyone else who may care, here is the functional block diagram for the dual rotation. I am working on the verification & test plane, but will need the updated functional requirements to finalize. Mitch

Hey all, Here is my copy of the design review Ashton



Some information on the Nippon Pulse linear shaft motors that I found. [] []

Andrew

Hey Nicole,

Here's the link to the actuator: Linear Actuator I think we're going to go with the L12. At first glance, the voltages will probably be +6 V or perhaps up to 12 V. And all currents are under 1 A.

Hello Team,

A few requests. If I can get the component functional diagrams sent to me for the architecture component of the report that would be great. Also Mike, can you post the link to the info about the linear actuators? I'll be able to get a specific slip ring quote that way so we can include that in the costing. I have come up with some new specifications, but don't have a force requirement yet. Who ended up with that device from Dr. Bertram? Can we get a weight on that middle piece? I will look and see if I can find back up for any sort of max acceleration in the human gait, so we can justify our max force. William- since this is your area of expertise let me know if you find anything on it as well.

I think its going well!

Nicole

Hey all, Here are the photos of the whiteboard: Ashton





The top contender for rotary motor: []

Great information on a variety of linear conveyance devices: @http://www.baldor.com/support/literature_load.asp?LitNumber=BR1202-G -Mitch