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Unread 07-11-2016, 20:21
stevefang stevefang is offline
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FRC #5700
 
Join Date: Nov 2016
Location: San Francisco
Posts: 2
stevefang will become famous soon enough
Custom Gearboxes

Hello All,


I’m Steve Fang from 5700, the SOTA Cyberdragons Robotics Team. We are a relatively new team, now going into our third year of FRC. Last year, our robot was very simple mechanically and we have very little experience with gearboxes, sprockets, belts, pneumatics etc. To try to learn as much as we can, we have divided our hardware team up into groups to take on a few offseason projects in preparation for the upcoming build season.

I’m working with a team of three on designing a custom gearbox for the 2016 Stronghold scaling challenge. Since I have little experience on this subject, I’d like to see if other teams or mentors have any suggestions or input on how to properly do this.

Our Goal:
Create a custom gearbox for a scaling mechanism to lift our 50kg robot up 2ft at a rate of 0.5m/s. We plan to do this with a winch.

From my calculations using 2x RS775 motors,(following the instructables gearbox guide http://www.instructables.com/id/Unde...earbox-Design/ ), our gear ratio would be about 21.4:1. Here is the spreadsheet for the calculations: https://docs.google.com/spreadsheets...it?usp=sharing

I also know the basic components that are needed for a custom gearbox, but we are still not sure about the specifics (material, gear types, mounting methods, spacers etc.).

Am I approaching this problem correctly? What should be my next steps? Any sites I can look at to find more information/buy parts for this project? Any comments or suggestions? Any advice on the subject would be a huge help.

We have access to basic power and shop tools (bandsaw, tablesaw, bench grinder, etc.). We have a mill and a lathe, both without DRO. We also might have access to use a waterjet at techshop.

If you have any materials or references or sources that you think would be helpful, please email them to sotacyberdragons@gmail.com.

Thank You!

Steve Fang

P.S. This is my first time posting on Chief Delphi, so please tell me if I’m not following some Chief Delphi etiquette that I’m not aware of!
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