paper: Feet Per Second / Misc Calculations

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Feet Per Second / Misc Calculations
by: chris L

FPS Calculator / Rotary Arm Calculator / Linear Calculator / Gear Center To Center / Drivetrain specs. All of these in .html files for ease of use.

Download “chris L calcs V4.0” for all calculators in a single package

Questions? Comments? let me know

Chris L Calcs.zip (21.1 KB)

2

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

3

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

-Anna

4

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

-Vivek

5

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.

6

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. :smiley:

7

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

8

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

9

What was it that confused you?

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

Thanks!

–Chris

10

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

11

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

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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

13

Update

Added a “How To” for using the FPS calculator

any suggestions for improvements would be appreciated

–Chris

14

Update

Added:
Get your Reduction for desired FPS

Put in:
-your Desired Feet Per Second
-your motor RPM
-your wheel size

and it will generate your reduction required to get your desired FPS

–Chris

15

Chris, these are becoming more and more useful. I was wondering, are you gonna put this in an all in one package???

16

I was thinking about that before but i wanted to keep them in separate files just for ease of finding them but once i find i have them pretty much how i want them i will upload them in a .zip file so you only have to download 1 file for all the calculators and “How To’s”.

Thanks

–Chris

17

Yep, I don’t think they’re done yet. It wouldn’t make sense to put them together until they were all perfect. :slight_smile:

-Vivek

18

Update

Fixed some of my math in the quick calcs.

If anyone would like me to add any motors or gearboxes as quick clicks let me know and i will put them up.

Please provide either specs on the product or a link for it.

Thanks

–Chris

19

Update

Added - Rotary Joint Gearing Design Calculations inspired by JVN’s calculator

Note: when using make sure you click the button in order starting with:
-Calculate
-Pre Calculate
-Calculate Initial

  • Final Calculate

Questions and Comments are recommended and would be appreciated

–Chris

20

Update

Fixed Rotary arm allowing it all to be done with a single button.

Added Drivetrain FPS / Specs

They both were Inspired by JVN’s Calculator

More to come

Please let me know what motors you would like in these calculators along with gearboxes reduction and wheel sizes.

Thanks

Questions and Comments are appreciated

–Chris