My third Corian Vector Table (Version 3):
I made several changes to this one, the most notable is that I have only used one piece of half inch thick Corian for the table surface. Because the table is thinner than Version 2 I increased the number of supports under the table to four one inch transverse supports and made the 24" longitudinal supports one and a half inches. I used my Laser Engraver, moving from corner to corner and measured the flatness of the table using a feeler gauge, it appears to be within approximately 0.010". I intend to see if I can improve the tolerance by machining the longitudinal supports on my CNC Router as they are the only surfaces that contact the laser bed.
The 12" by 24" table surface has 4,608 prisms, basically 16 prisms per square inch of surface. I used a 60 degree Vbit to machine the prism rows to 3/16" deep which should allow for plenty of air movement directly under the surface of the material being cut. Note that once again I have not included an XY fence or a scale in this design, the reason is that I prefer to be able to use tape to hold the plastic down to the vector table which keeps it as flat as possible. I have an idea how I can add this feature in the next version so the fences can be raised or lowered depending on the project.
The offset of the two outermost transverse supports provide handles which make it easy to install and remove the table from the laser engraver.
I have asked Mike Null to test this version of my Corian vector table and tell me what he likes and dislikes so i can continue to improve on the design. Your C&C are welcome.
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