The Y Axis (Vertical
If you are building the CNC foam cutter for RC wings, then you would
probably need 10" max travel on the Y towers.
If building a hot wire CNC foam cutter for props, crowns, moldings
You would probably want to go with a 4' x 4' (X x Y)
EPS Foam billets are usually
3' x 4' x 8' or 4' x 4' x 8'
XPS foam comes in sheets of about 4' x 8' x
(1" or 2" or 3" thick)
If building a CNC foam cutter to cut Polyurethane foam - FORGET IT
Polyurethane foam should not be cut with hot wire, but a blade or a saw
There are CNC foam cutters for Polyurethane that work similar to a band saw
But use a abrasive wire instead of a saw -
click here for more
In this section we will build the two Y posts or towers (Y axis).
The posts can be found at
the fence section at Home Depot
You can replace these posts by any other post as long as you
are able to keep them from vibrating during the cut.
Any vibration of the posts will result in vibrations on the wire
resulting in "waves" or not smooth cut of the foam.
The following can be found in the drawer
section, you will need two 16" drawer slides
The Home Depot Catalog number for 24" slides made by Liberty
Would rather go with high end slides ?
Search Google for linear slides
And two 4 foot stands
The above picture is of the 2"x4FT Post with foot - that's the Home Depot
Cat num: 204-008
Home Depot num: 6-39426-48607-7
measure 6" from the base
Mark both holes
Now the 2nd one
Drill the two holes
Place the rivets - or self cutting screws
Use the River gun - make sure that no dirt will reach the bearings !!!
And now do the same for the other stand