Hi, I have been cutting pieces that have a flipped fillet radius for the four corners. I really like how the flipped fillet looks when compared to the other corner options. However, I am having a frustrating issue in that when I go to cut the piece itself the bottom left corner, where the router always starts, too often gets a small chip in it and usually when the that happens the entire radius itself has small chips/teeth marks from the bit.
I have used multiple spiral bits, up cut, down cut, up/down cut and had the issue happen with each of these. I have used both the original router that can be ordered with the Shapeoko and the Makita and I am still getting this issue. I have played around with the feed rate and plunge rate, and still have this chipping issue.
I sent an email to Carbide support about this a month or so ago and the person gave me the suggestion to add some geometry by adding some offsets. That was helpful, but the issue still happened. I cannot seem to cut more than a few in a row before having this chipping issue.
While I am no professional, I do not get why I am having such an issue with this seemingly simple stock design when I see people make some incredibly intricate and beautiful designs on youtube and online elsewhere.
The first two photos show the issue I am having. The third shows how the other radius corners are always unaffected by this issue. It is just the bottom left corner where the router starts. The final two photos show a second piece where the mishap did not happen. I have not been able to figure out why exactly this is happening.
If you have experience using the flipped fillet feature and have certain feed and plunge rates you use that information could be real helpful. Any other ideas of why this may be happening and what could solve it would also be very much appreciated. If you think you need more info about the issue let me know and I will do my best to answer.