electrotwelve
Plastic
- Joined
- Oct 17, 2018
Hi, I recently built my own cartesian style CNC router with 12mm plywood parts. Its mostly an OX style CNC with delrin wheels for linear motion on V-slots. I can mill 6061 aluminium on this but I see a lot of chatter. Here is a video where I'm milling a 5mm hole and as you can see there is a lot of vibration and an awful racket as the mill goes down the material (look at the mist nozzle. Why is this?
CAM was done in Fusion 360. This was a boring operation with a 0.1mm step pitch. Material thickness is 6.7mm. Feed was 260mm/min. The tool is a 4mm 2 flute end mill.
Could this probably be because of the delrin wheel based axes? Would replacing them with a linear shaft and blocks help? Perhaps I'm doing the wrong operation?
CAM was done in Fusion 360. This was a boring operation with a 0.1mm step pitch. Material thickness is 6.7mm. Feed was 260mm/min. The tool is a 4mm 2 flute end mill.
Could this probably be because of the delrin wheel based axes? Would replacing them with a linear shaft and blocks help? Perhaps I'm doing the wrong operation?
Yes the rigidity of the materials is important for reducing chatter. The factor also of whipping through cutting something which does not have a stable foundation gives my pause for safety reasons most importantly. This is the first time I can recall plywood. Even using material such as aluminum there are still problems with design or not enough support built in as it is. You are not alone here I am sure. Try some videos on you tube on the subject and you will get more good info. I would recommend taking a video of your rig and how you built it and the issues you have. Most all posters are not shy about trial and error and you could give good feedback. Maybe it might even go viral. The important things are lesson learned and no one got severely hurt or injured. Next time run it past your mentor and if you don’t have one place them on order.
