paper: Feet Per Second / Misc Calculations

[chris L]

Thread created automatically to discuss a document in CD-Media.

Feet Per Second / Misc Calculations by chris L

[vivek16]

WooHoo! Nice and Simple, I like it. This will come in handy, I hate getting out my calculator or dealing with chunky spreadsheets everytime I need to make a few calculations.

thanks, Vivek

[Anna B.]

Thanks for developing such a simple tool for doing those kinds of calculations, it will definitely come in handy a lot!

-Anna

[vivek16]

w00t!, gear pitch calculator for the win. I love these updates keep em coming.

-Vivek

[chris L]

Updated Calculator:
-Added Quick Clicks for Motors, Reduction and Wheels

Added Gear Spacing Calculator
-Simply put in the pitch of 2 gears and it will put out 3 different types of fits

Any Comments and Improvements are appreciated.

[vivek16]

Is anybody interested in writing a simplified version of this program for TI84 calculators?
That would be awesome to use.

thanks, Vivek

p.s. sorry I'm posting so much, Chris is using me as his guinea pig and I really find this thing useful. It cut my drivetrain design time from 5 min. to about 5 sec.

[JVN]

Hi Chris,
This looks like it could be a good resource for some quick calculations. I haven't had time to check your math, but it seems reasonable off the top of my head.

If there was one thing to criticize it is your presentation. There were some things you did which confused me a little bit. Maybe it is because I read into things too much due to my familiarity with this material. Some of your terminology is also a little confusing. Nothing that some massaging can't fix.

Overall good job! The best part about this sheet for me, is the lessons that YOU must have learned while creating it. It takes a certain familiarity with the math behind these concepts to create something like this. Kudos to you for taking the time, it will certainly serve you well in the future. I hope you continue to evolve & improve your sheets, because as we all know, design IS an iterative process.

Kudos!
-John

[chris L]

Originally Posted by JVN

Hi Chris,
This looks like it could be a good resource for some quick calculations. I haven't had time to check your math, but it seems reasonable off the top of my head.

If there was one thing to criticize it is your presentation. There were some things you did which confused me a little bit. Maybe it is because I read into things too much due to my familiarity with this material. Some of your terminology is also a little confusing. Nothing that some massaging can't fix.

Overall good job! The best part about this sheet for me, is the lessons that YOU must have learned while creating it. It takes a certain familiarity with the math behind these concepts to create something like this. Kudos to you for taking the time, it will certainly serve you well in the future. I hope you continue to evolve & improve your sheets, because as we all know, design IS an iterative process.

Kudos!
-John

What was it that confused you?

If you get back to me ill have a new version up soon with the updates

Thanks!

--Chris

[Ken Patton]

Hi Chris-

Nice! This looks like a couple of good resources for people who are speccing out their drive systems. Your ~0.9 factor for what the actual speed of the CIM is a decent estimate for the general case, I think.

I think one of the great parts of this is your careful attention to what units are being used at each step of the process.

I agree with John's thought on making it as clear and understandeable as possible. You can never stop making it easier to use.

Not that these ideas would make it easier to use (probably the opposite ) but how about at the important parts of the calculation having a link which describes the calculation that is going on behind the scenes? Or how about a couple of plots showing the results that got generated (top speed versus gear ratio, for example). How about a pushing force calc?

Keep up the great work,
Ken

[chris L]

Originally Posted by Ken Patton

Hi Chris-

Nice! This looks like a couple of good resources for people who are speccing out their drive systems. Your ~0.9 factor for what the actual speed of the CIM is a decent estimate for the general case, I think.

I think one of the great parts of this is your careful attention to what units are being used at each step of the process.

I agree with John's thought on making it as clear and understandeable as possible. You can never stop making it easier to use.

Not that these ideas would make it easier to use (probably the opposite ) but how about at the important parts of the calculation having a link which describes the calculation that is going on behind the scenes? Or how about a couple of plots showing the results that got generated (top speed versus gear ratio, for example). How about a pushing force calc?

Keep up the great work,
Ken

Thanks i am planning on making it a lot more user friendly and hopefully eventually make it have a nice interface.

I will put up a page on how i make these calculations so if i made a mistake you can check my math.

Im currently writing up some rough very rough calculations in excel to calculate acceleration, and how much pushing power you will have (with rough top and wedge top) and eventually make it into a web page.

Thanks

--Chris

[chris L]

Update

Added updated calculator allowing to do real time updates for final FPS when you change one of the Gearboxes or Wheels using the Presets.

Added a "How To" for doing FPS

Any Questions or comments are appreciated

--Chris

[chris L]

Update

Added a "How To" for using the FPS calculator

any suggestions for improvements would be appreciated

--Chris

[R.C.]

I second the calculator thing, but could anyone write it for the TI89's please??

[vivek16]

Maybe you could make custom gearbox calculator? With the different gears, etc. Also, compiling some white papers and explanations might be helpful to rookies. I would be glad to write a few of them I had a hard enough time finding all of this info. (CD helped me a great deal).

I'm hoping this might become kind of like that CD/DVD set miss daisy sends too rookies but for mechanical info.

-Vivek

[chris L]

Update

Added: Intake Gearing Calculator "inspired by JVN's calculator"

Any ideas to make it easier to use or any motors/gearboxes you would like added please let me know and ill add them to the next update.

Thanks

--Chris