- Joined
- Oct 21, 2017
- Messages
- 504
I've never used one but the biggest drawback I can see is the need to retram the head.
Tramming is setting the machine such that the spindle/column are at 90 degrees to the table surface, round column mills do generally not lose tram when you raise or lower the head.
I believe you are thinking of positional alignment of the spindle centre line which is lost on many round column mills, but not all, exceptions including Rishton and Emco FB-2 models.
Regards,
- Nick