Beams not straight after sawing

I am new to totem. I start sawing a beam with the beam-sawing-tool, After finishing the cuttings were not exacely straight. What did I wrong.

By using saw and stove, cuts aren’t straight enough?

We have Pro Cutter tool for straight and clean cuts: Totem Beam Pro-Cutter | Totemmaker.net

Yes I have thes tools. Today I saw that I have put the balck piece not deep enough onto the frame

So cuts now are coming nicer? :slight_smile: