Disclaimer: We have used FUSION 360 since the 2017 season. We have ran into performance issues as others have mentioned when working with the final robot assemblies. However we have developed some strategies to overcome these limitations. Being mindful of rigid groups, not modeling threads on fasteners and importing/linking subassemblies has basically resolved the issue for us. If you are looking for a 100% web based solution, Fusion360’s browser functionality pales in comparison to OnShape but works well if you only need to edit designs on a chromebook or when away from your CAD stations.
However where Fusion360’s shines, is it’s integrated CAM functionality.
Our kids 100% CAD, CAM and machine the robot each season via an in house cnc router. Having CAM integrated into the CAD platform really improves our work flow as we don’t have to export files from CAD into a separate CAM utility every time there is a slight modification to the design. This allows us to iterate and test designs easier and faster. (For reference, if you need to move a hole a 1/4", using Fusion, change it in CAD and then go to the CAM tab and hit “update”, your CAM auto updates and is ready for machining). No need to export DXFs or go through the entire CAM process again, which for complex parts can take a significant amount of time.
Iteration and prototyping is good and having a tool that helps facilitate more iterations within the FRC season more than makes up for the slight hiccups we encounter. Also in terms of learning curves, you only need to teach new students one platform, rather than one for CAD and another for CAM. Less overhead to get kids operational.
Overall we have been more than pleased with Fusion360, as someone that uses PTC Creo, Solidworks and Inventor professionally, there is rarely an instance that I can’t accomplish something in Fusion that I could in those other platforms. However, if you think you are limited in CAD station hardware and you don’t machine most of your robot or iterate often on machined parts, OnShape might be a better choice.