Bandsaw drift

[Steve Maskery]

Assuming that your blade and table are square to one another, my next line of enquiry would be the tension. 20mm is at the top end of what most home bandsaws can successfully tension. It should be whacked up pretty much as far as it can go, I would think.
S

 

[Alder]

Thank you.
Russell

 

[Random Orbital Bob]

Also feed rate. Keep it really slow