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Someone bought up this point in the other discussion but 3D printers is a really bad example for a gantry for production based systems. This is mainly because o
by syntaxing 8y ago
Someone bought up this point in the other discussion but 3D printers is a really bad example for a gantry for production based systems. This is mainly because of the open loop design and the asynchronous motion profiles between the motors. There was a lot of work that went into GRBL to make the axis seemed sync. Also, getting into motion profiles is super tricky as well (which is trapezoidal preset in GRBL). The thing with these devices is that it has to be working 100% of the time with a feedback making sure its doing what you expect.
That being said, besides the kinematics, instrumentation for hardware is the tricky part. Getting repeatable and consistent measurement for large production quantities is not an straight forward task. Processing and digesting the results is also another hurdle.
- Bartweiss 8y agoI'm curious whether there's a better reference for gantry robotics? It looks like the hard parts here are non-mechanical, but I'd be interested to know more generally. Automated brick-layers come to mind as another 3D positioning task with no pitch or roll, but I'm not familiar enough with the general space to know if they're at all representative. Among other things, I seem to remember they can't corner properly, which suggests they might be operating on a linear axis and a width rather than a proper 3D workspace.