Help needed with correct speed settings

LowRider CNC Troubleshooting
1

Hi some advice would be welcome!

I’m cutting 3 cm thick oak with a single flute 1/8 mill with length of 32 mm. DOC is 3.175, feedrate 15 mm/s and spindle speed is lowest setting makita (10.000rpm).

During the last outer cut the cnc got misaligned unfortunately. See pictures below. I tried to clean it up afterwards and the wood chips were really stuck in the cutting groove. Could this be a cause?
Should I de/increase the feed rate, or increase the spindle speed? Chips seem a bit large, but my experience is limited.

Near the end I set the makita to 2, and soon after it got misaligned by a lot and so it was milling with a DOC of about 25 mm. Not sure if this was because I increased the rpm or that it was just already misaligned by to much, or had to much stuck in the grooves.

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I also made one earlier with a feedrate of 12 mm/s without any problem.

2

Maybe a dull bit.

3

I increased the spindle speed to 4 on the makita and this time it did not have issues. The cut came out nice and the chips we ejected better from the groove. Still not sure if this is cause, but it seems to work for now.