Feeds speeds and Parting off with the Orac

[thompo]

Hi folks,

I have my Orac running off linuxcnc with most of the original electronics.

It cuts quite well in alu, steel and ss using carbide inserts but I cannot get it to part off any material successfully.

Have tried 1.5-3mm carbide and 1.5mm hss blades but the tool always ends up digging in and breaking the tip of and damaging the tool and/or work piece.

Any recommendations for parting off with the standard multifix tool post arrangement?

Thanks