The Polar Bear – Open-Source, Multipurpose CNC Machine with a Rotary Axis

Re:The Polar Bear – Open-Source, Multipurpose CNC Machine wi... by jjk166 on Thursday August 19, 2021 @04:21PM (#28238873)

Given that the parts for this are meant to be 3D printed and thus the people who have this presumably already have a regular 3D printer, it probably makes more sense just to make a rotary table for your cartesian 3D printer.

Also given that objects on the rotary table can not overhang without causing interference with the vertical axis column, there's really no harm in adding another column and spanning the horizontal axis across, instead of cantilevering it. This will provide a substantial improvement in rigidity.

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Re:The Polar Bear – Open-Source, Multipurpose CNC Machine wi... by kadirilkimen on Friday August 20, 2021 @07:25AM (#28244840)

This is totally doable and there is no harm to do it.

It would be another project and I hope someone develop something like that.

All these things can change widely by choises. We can't claim that this is better or that is better. All have their own pros and cons.

I designed the PolarBear this way because I was hoping that machining 4axis like would inspire a lot of people to do different things on cnc machines.

[ Parent | on HN ]