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A comment on The Polar Bear – Open-Source, Multipurpose CNC Machine with a Rotary Axis. Parent comment

Re:The Polar Bear – Open-Source, Multipurpose CNC Machine wi... by sschueller on Thursday August 19, 2021 @05:49AM (#28232007)
This thing is not very rigid and the interconnections are made of plastic. There is a lot of flex and anything other than soft materials can not be milled with any precision.

One main reason professional 5 axis CNC machines are so expensive is because they are very rigid yet can move quickly and precisely.

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