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27-12-2011 #4
I spent some time experimenting with cutting MDF templates for the best layback and what you see in the pics is the outcome. I found it gives the best balance and can still be got from 12" x 3/4" plate from Alu warehouse with the minimum waste. Thou not exactly on centre of bearings it's pritty close.
Regards the Z axis I really would consider putting the rails on the front.! It does help regardsless of rail type used.
Remember the Z axis when extended is basicly a lever and a weak lever will bend and flex.!!
Like I allways tell folks.!!. . The machine is only has good as it's weakist part or component.!!. . . Unfortunatly I see lots make the mistake of building weak or inaccurate Z axis's. Which makes the rest of the machine no matter how well built or quality components used pointless because at the end of the day it's the Z axis which is at the sharp end taking the strain.
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