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TWEAKIE my CNC machine under construction. |
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CNC is only limited by our imagination. |
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Construction 2. |
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(7) The table is made from 20mm alloy plate 455mm x 455mm square. This piece was given to me by a very nice Guy.
(8) Getting the linear rails parallel and the X and Y axis at exactly 90 degrees to each other (in both planes) is tricky but this is where the clearance holes and nut plates play their part.
(9) Flexible plate coupling between the ball screw nut and slide for the X axis. It is vitally important that there are no tight spots on any of the slides or the screws and any measures that allow for adjustment or correction for small misalignments of these components are beneficial.
(10) No bolts have been fully tightened yet. Once everything moves freely then they can be tightened. Incidentally ball screws 'back feed' ie. the table can be moved back and forth quite easily by hand, there is very little resistance from the ball screw.
(11) The Z axis starting to take shape.
(12) The Z axis uses round section linear slides and a trapezoid lead screw. (this does not 'back feed' and there is no chance of the cutting tool dropping and hitting the table when power is removed) |
