Getting tear-out - need advice

[scalesr1]

You could use a ramped profile with very shallow DOC to mark the slot to around 2mm depth prior to cutting it, a bit like using a marking knife in conventional woodwork to prevent torn surface edges on saw cuts.

That does make sense though the software that I am currently using to generate gCode does not support that.
I will look in to CNCUSB as that allows some creation of code independently.
Here is a picture of the kind of thing I am experiencing:



I suspect that if I 'face off' the entire piece after this work then the problem will be removed but I am just wondering, should it be like this? Is it the wood? Is it the tool? Is it the feed rate or speed?

Kind regards
Richard