Page 267 - CNC Robotics

Chapter ii / Tool Holders and Testing

Figure 1:1..18
Big enough for tool
change.

Testing the CNC Machine

Your machine will need a flat smooth surface between the frame
beam s. If you haven 't yet placed an ything between the beams,
now is the time. I used two sheets of 3/ 4-inch MDF as the table
surface (see Figure 11 .19).
The sheets of MDF were cut to length and width on the panel saw
at the lumberyard where I purchased them. MDF is heavy and
dense, but one sheet will probably bend a little between the sup-
po rts, so I used two. I haven't noticed any deflection yet , although
my method of checking is with a stra ight edge -not the most
accurate method . With the working surface in place, install the
penholder (with pen) on the z-ax is tab le. The n place a piece of
paper over the working area of the table (see Figure 11.20).

257