OD Peck turning plastic

[George Hardwick]

Just had a 250mm Dia Polyprop OD turning job to cut.Long taper lots of material to remove.

Horrible stuff to cut as you cant get it to chip.a normal OD rough path would have been a nightmare.so I Used a groove chain toolpath.Used a normal OD tool, using the peck, dwell and depth cuts,nice big stepover (which is now a percentage of the total tool width not insert width as a grooving tool would be.) using the groove toolpath, just had to extend the chain to accomodate the full tool width at the start.Material came off in 6 inch long ribbons 3 dustbins full,and all fingers intact!Ran the full programme 40 mins without having to stop for tangles or birds nest.Just thought the idea might help someone with similar jobs.It would be nice to have peck and dwell in normal OD turning for stringy material.

I expect some Lathe guys are already using this method,if so sorry to waste your time!!

George.

[88Matt]

Thinks for the tip!

[Oppiz]

Isn't that great when an idea like that works.

 

It's one the many job satisfactions this trade has.