Hi All,
I’m looking for a list of things to check when see the end mill being pulled off track by the load on the end mill.
I was conventional milling some oak and the load should not have been too much on the end mill. By the path it was taking it seemed to be pulled off course to the point were it ended up breaking.
The spindle is the one that ususes 3.17mm end mills.
I’ve done the 30 minute stiffening mod already. Given I’ve had good results in the past, I’m thinking the machine needs some maintinence.
What are your suggestions?
Please share the easel file or the details of your carve settings.
I suspect a cut depth that was too aggressive.
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You should also tell us about the bit you are using. We understand that it’s the 1/8" (3.17mm) shank.
I was snapping a lot of very thin bits in oak as well. There can be several causes. If the bit is quite long and your are taking shallow passes, that makes for a lever action that can break bits near the collet. Another factor is if you are cutting deeply and the bit begins to grab along the channel it is cutting, that puts a lot of torque on the bit which can snap the bit on the shank.
I found that be small bits could deflect quite a bit and that they wanted to follow the grain.
