Re: ejection problems with Star SR-20RIII
What type of KO system does your machine have? I know some stars are spring loaded and some have air cylinders.
Have you tried turning a cup/cone into the KO pin? I would take a 60* chamfer tool (or 90* if you dont have a 60) and put a 60* cone into the KO pin all the way to the OD, or very close to it if the KO pin gets caught on the back of the sub collet. That way, the KO pin should naturally center the tip of the screw on ejection.
Another thing to try would be to turn the sub spindle on in the direction that would 'unthread' the screw from the sub collet and let it dwell at the ejection spot for a couple seconds. You'd have to do this at fairly slow RPMs, like 100-200 probably.
Also, props for being the ultimate lurker. 2 posts in 9 years. welcome to the land of the active posters!
CNC Product Manager / Training Consultant