[HELP] First thread turning.

[Sunset Machine]

Just to add a bit about feeding in at an angle. You mentioned the helix angle; feeding straight in results in a negative rake on the right flank which will probably cause problems with surface finish on lighter machines turning coarser threads in poor materials. It's reduced by feeding in at slightly less than 30 degrees. Unfortunately, there seems to be a discrepancy between lathe manufacturers as to what that actually means on the compound, but the object is to feed nearly parallel to the trailing flank of the toolbit.

Also, it seems to me a back rake in the tool bit can be compensated for with a greater than 60 degree form. The math required escapes me, but I would expect an improved finish from a shearing effect although I've never attempted it.