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SheldonE
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uncle_bob
What is the advantage of the racks over the lead screws?
I was thinking about the issue of not using the whole length of the lead screw for the Z height. The suggestion to use rack and pinion was just a "throw it out there" comment. It seems to have more problems than it solves.
I don't know that it creates more issues, it simply has some follow on impact on the design. If you change things enough you don't have a Lisa anymore. It turns into a design from scratch sort of thing.