This part of the build was looking for the cheapest way to boost the frames rigidity and dampening effects so it can handle machining metals.
I decided to use 3 lengths of 12mm reo rod that was purchased cheaply from the local hardware store which i glued in with epoxy resin. The reo rod diameter was slightly too large for the c-beam profiles so I used an angle grinder with sanding wheel and shaved off 1-2mm off.
As you can see above the three reo rods fit snug into the profile . The other two empty profiles were filled with a blend of sand, epoxy and steel shavings. Reason I done this was for the extra dampening effects provided from eg over steel rods. doing this mod to the profile adds alot of weight and strength to the c-beam.
Optional mod which wasn’t necessary but I still done anyways, Stainless 4mm rods were inserted with epoxy into the profiles 4mm holes. Only issue with this is I had to make sure it didn’t block the threads at either end of the profile.
Pillars were filled with non-shrink grout with added 4-5mm gravel.
overall this mod will boost the cnc rigidity and dampening effects at minimum costs due to the mass of weight of the machine. Happy with the results.