First I think I should go over why my old machine didn't work and why the new machine works a whole lot better. With my other design the plastic was heated while sitting above the oven, I did this because heat raises and I thought this would heat the plastic more effectively. As you see I underestimated how effectively this method actually heats the plastic. The plastic got to hot, sagged to much, touched the coils and caught on fire. The new design holds the plastic below the oven so that when it sags it falls away from the coils. It might not heat the plastic as fast but the heating process is much more controllable.
Step 1: The New Base
Materials needed for the Base:
1 1x4x8ft lumber
2 1x2x8ft lumber
4 1in angle brackets
4 5/16in-18 x1.5in hex bolts
4 1in wood screws (for the angle brackets)
The pdf has drawings for the oven and the new base. The base parts are VF-09 to
VF-14. There is also an assembly drawing of the base with all the parts labeled. The angle brackets were drilled and tapped to 5/16-18 threads for the hex bolts. This is so you can clamp frame to the oven while the plastic is being heated. To take the frame out once the plastic is heated you have to loosen the 4 bolts pull the frame forward and off the bolts and then just lower it onto the platen.