...after a long time, I've made a grinding rig but something went wrong

[Claudio HG]

Hello everybody. It's past a long time since my last post. The last months were, you know, troublesome.
This project, that was kind of an experiment, was prompted by the need to cut at an angle steel parts to make the dovetail ways for a cross slide of a DIY lathe that I'm building.
So I conceived a rig that, exploiting an angle grinder, should allow to make a titled, quite precise cut (that was the theory) on steel bars. But things not always turn out as expected.
This is the video where I show the making of, and what went wrong.
Cheers.