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Subject: CNC Z-axis: Quill or knee?
Posted by: Bertho Boman
E-mail: boman(at)vinland(dot)com(no spam)
What are pros and cons for using the knee
versus the Quill for feeding the Z-axis?
I realize the obvious con of much larger
mass and force required and massive
"weight compensating springs" for the
knee. On the other hand, locking the
quill will give a much more rigid system.
My "Bridgeport type" mill already has
built in DRO. I intend to use the DRO
encoders for the CNC function. The Z-axis
is monitoring the knee, not the quill.
I can always switch to the quill but I
like to evaluate my options before digging
into the conversion.
in now too hot Florida
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