Zen Tools CNC

General Composites Discussions Equipment Talk
#21

Something to think about since this is a composites forum after all.

A lot of high-precision machines are being made with composite construction now. There has been much discussion on cnczone but not a ton of real progress there for a DIY solution.it seems they are more focused on the “perfect” formulation rather than just diving in.

Basically, the composite material is resin mixed with an aggregate in a mold with reinforcement, mounting plates, threaded inserts, etc. cast in as needed for the design. Most are using epoxy and things like sand and various size rocks, pebbles, etc. as aggregate.

Most focus seems to be on getting all of the air bubbles out when molding the components

The great thing about this, a person could build a usable sized production capable machine without need for expensive cast iron foundry work. The “epoxycrete” castings have very high mass,stiffness, and great vibration damping.

I did see pics of a of a small machine a guy from Germany (I believe) was building. Wish I could see more since it was well executed. But the pic came from a foreign language board and I nevr saw a link to it.

#22

Btw… I don’t believe that most machines for production in home shops would be too negatively effected by a few small air bubbles in the castings. I know they can cause problems but how much use could a person get out of something like this before it mattered.

If cutting fiber id probably enclose the steppers or servos and build or buy a sealed water cooled spindle. And an enclosure is a good idea.and maybe even a water filter made with a 5 gallon bucket,pvc, and a shop vac like what guys make to remove dust in their blasting cabinets. It shoud keep the carbon dust from eating vac motors.

#23

Awesome machine! Biggest advantage is that it’s mobile. Mine is a permanant garage resident with a flat bed of 48" x 96" x 9". Big and bulky but it gets the job done.

CNC’s are a really interesting and fun tool to see what you can make. I’ve had mine for over 7 years now and don’t think I’ll ever get tired of it. Congrats on your purchase and have fun.

#24

Well, it was fun while it lasted! I sold it a few months ago since I needed the money. I hope to get a larger machine, and more importantly rigid, like you have in your a garage.

What model do you have?

#25

I have a Torchmate 3 gantry style machine. Initially It’s made to cut metal using a plasma cutter. I made my own upgrades to be able to cut carbon. Now that’s finished I’m really interested in learning 3D wood carving.

They have everything from 2’ x 2’ to 120’ foot movements. There are a lot of models and brands out there. Just find one that suits your needs.