Instructables

Step 24: MDF Base

This is pretty easy too, get a piece of 3/4" MDF from the hardware store and have them cut them cut it or cut it yourself. The 4 threaded rods are each 4" long and bolt this base and the x axis frame together.  They are also used to level the frame.  I used 3/8"-24 NF fine thread but normal coarse thread work work just as well. I used a 1" spade bit to counter bore the holes in the mdf.  You should go deep enough to allow the stud and nut to sit below the surface of the wood.
 
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