Greets, many thanks for all the documentation and a great design. I built my CNC and am having trouble with bit jumping. I’m currently using a 1/4" router bit, but I’ve had the same issues with 1/8" end mill and ball nose. It seems that the bit starts vibrating and due to feedback the vibrations become a massive chatter until the bit jumps. I’ve attached a link to show whats happening.
I’ve fiddled with the z-axis bold tension, leveled everything, added layers of MDF to bring the z as high up as i can go. I’ve about run out of ideas.
I’m using a very conservative feed and depth, the depth is less than 1/8" deep with a feed rate of 10 in.
Here’s a video link: https://www.youtube.com/watch?v=GIa3-fYNnwo
And to get an idea of the build, I’ve attached an image i took during the build process.
Any ideas would be great.