How to turn a square polygon on a regular lathe? Urgent machining method and video

Are you machining square polygonal rows or clamping square polygonal rows ? Remember, lathes can't machine polygonal rows. A lathe can only do ones that are connected to a circle . For example. Taper circles, random circles, arcs... And threads. They can't make the positively variable rows you're talking about. Positive multi-variable rows are used in milling machines, wire EDM. . and other equipment. If you just want to clamp, 6 angle can be directly with three-jaw home, square can be used four-jaw, irregular can be used flower plate and special fixtures.