Lines in carving

Anyone know why my machine is leaving these lines, when carving out an area?

It looks like your bit is not perpendicular to your waste board. Gantry out of alignment

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spindle is not trammed.

I will double check that. Thank you

Trammed?

https://www.google.com/search?q=tramming+a+cnc+router+spindle&rlz=1C1CHBF_enUS824US824&oq=TRAMMING+A+SPINDLE&aqs=chrome.2.69i57j0l2.9059j0j8&sourceid=chrome&ie=UTF-8