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Unread 07-02-2016, 01:23 PM
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FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

This link below will allow you to make a copy of the spreadsheet that both Aren Hill and myself have developed and used over the last couple years.

It isn't quite as polished as I would like, but it gets the job done. Feel free to poke around and leave a comment if you find anything that seems wrong, have any questions, or any suggestions for future revisions.

Here is an index of what is included in the sheet currently:

Motor Specs
Motor Combiner 1
Motor Combiner 2
Single Speed Drive
Motor Analysis
Available Drive Components
Sprint Distance
Gears
Belts
Battery Stats
Wire Stats
Arms/Rotary
Choo-Choo
Winch
Shooter Wheel
Momentum Vs Traction
Pneumatics
Weight Analysis


Link to create a copy of the sheet:

https://docs.google.com/spreadsheets...py?usp=sharing
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Last edited by Dillon Carey : 07-02-2016 at 01:36 PM.
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Unread 07-03-2016, 12:06 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

A nice bit of work! Thanks for sharing!
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Unread 07-03-2016, 12:29 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

Thank you and Aren Hill for putting this sheet together. It's definitely going to be one of those calculators I refer to throughout the year for conceptualizing and designing robots and mechanisms.
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Unread 07-03-2016, 01:35 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

Awesome job. I think there are some improvements that could be made to the available power transmission components. I realize with Aren's involvement, it's going to be Vex-biased, but there are quite a few AndyMark gears not shown (particularly some of the odd-toothed gears), which can be useful for getting just the right reduction you're looking for. It would also be useful to include dog gears and ball-shifting gears as well.

Also, the motor spec for some of the motors use the published specs rather than the tested specs.
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Unread 07-03-2016, 01:35 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

Awesome that this is finally public. Thanks guys.
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Unread 07-03-2016, 04:16 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

Quote:
Originally Posted by Michael Hill View Post
Awesome job. I think there are some improvements that could be made to the available power transmission components. I realize with Aren's involvement, it's going to be Vex-biased, but there are quite a few AndyMark gears not shown (particularly some of the odd-toothed gears), which can be useful for getting just the right reduction you're looking for.
Adding the AM gear options would be useful. I would definitely still want to separate AM and VEX, to help reduce shipping costs.

Quote:
Originally Posted by Michael Hill View Post
It would also be useful to include dog gears and ball-shifting gears as well.
As you can see, there is a distinct lack of any support in the spreadsheet for multiple speed gearboxes. This is because in my opinion, drive trains only need 1 speed (with verrry rare exception).

That being said, the dog and ball gears can be used on things other than drive trains, so I may add them.

Quote:
Originally Posted by Michael Hill View Post
Also, the motor spec for some of the motors use the published specs rather than the tested specs.
This is definitely something that would be nice. Does anyone happen to have all of the test motor specs in a convenient spreadsheet format?
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Unread 07-03-2016, 04:22 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

Quote:
Originally Posted by Dillon Carey View Post
This is definitely something that would be nice. Does anyone happen to have all of the test motor specs in a convenient spreadsheet format?
Correct me if I'm wrong, but JVN's 2016 design calculator has all of the tested specs I believe. Just go to the data page and you should find everything you're looking for.
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Unread 07-03-2016, 04:25 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

Quote:
Originally Posted by Dillon Carey View Post
Adding the AM gear options would be useful. I would definitely still want to separate AM and VEX, to help reduce shipping costs.
This would be great. Perhaps use color coding to indicate which are available from which? (e.g. Blue = AM, Yellow = VEX, Green = both)
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Unread 07-05-2016, 10:59 AM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

This is *AWESOME*! Thanks!
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Unread 07-05-2016, 01:38 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

Thanks this looks very useful.

I just wanted to point out on the Gears tab the formula written in cell A2
CC=((N1+N2)/P)+O should be CC=((N1+N2)/(P*2))+O. It appears that it is correct in the actual calculation just not in the description.

Thanks,

Chad
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Unread 08-11-2017, 11:38 PM
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Re: FRC Mechanical Design Calculator (By Dillon Carey and Aren Hill)

I'm wanting to resurrect this thread to ask a quick question. I'm looking at the Sprint Distance calculator, specifically the data table at the bottom. The data table also includes information about traction limiting and whether or not a drivetrain could break traction. Cell F29 references J25, and I believe it should be referencing I25 instead. J25 is the force limit at kinetic coefficient of friction, when I believe it's supposed to be referencing the force limit at static coefficient of friction.

I'm pretty sure it's just a slight typo, but I wanted to do a sanity check to make sure I've not made a mistake.

Thank you!

EDIT - Ok, now I'm looking at it again and I'm just not sure. I would think that'd you still use static COF for the moment the wheel starts rolling against the carpet, but I can see how it might not be as simple as that. But I also don't think you would use the kinetic COF either. So is this an instance where the reality is somewhere in between? Or am I misunderstanding things?
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Last edited by Cothron Theiss : 08-11-2017 at 11:43 PM.
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