OKUMA CROWN OSP700L 2axis lathe, BRAOCHING?

Fred Rezfield · Aug 31, 2021

hey guys i am working on a 1997 okuma crown 762S bb OSP 700 control (with IGF & USB emulator)
can you cut internal keyways with this machine? has anyone tried it?

Dan from Oakland · Aug 31, 2021

Pretty sure there is no way to orient or lock the spindle, so if you are ok with just letting it sit there while you broach away, it should work ok.

cunaf85 · Aug 31, 2021

If it has a C axis, then it'll be fine. Might try turning the spindle override to zero to lock the axis. Works on some machines. Never tried it on an old Okuma.

Houndogforever · Aug 31, 2021

I have ONE part that needs a 8mm internal keyway cut in it. My Hardinge Conquest has a disc brake to immobilize the spindle. I bet I could do that.
How do you program this?

Fred Rezfield · Feb 27, 2022

Dan from Oakland said:
Pretty sure there is no way to orient or lock the spindle, so if you are ok with just letting it sit there while you broach away, it should work ok.

haha that's the best answer
maybe i can hold the chuck myself ?? you think one hand will do?

Fred Rezfield · Feb 27, 2022

you have brakes?
then try M19
i am sure you can just G code it. if you have live tooling then you have more options. but i personally hate those machines i can't imagine anyone being able to operate one .. unless you were left handed.

Jashley73 · Feb 28, 2022

To the original poster, if your machine has a M19/spindle orient command, then it should certainnly be possible. You'd have to write a program, and most likely use some User-Task (custom macro in Fanuc-speak) to make your routine repeat.

I don't see why it wouldn't work though. Those little broaches shouldn't generate that much Z-axis thrust, compared to big indexable drills or big heavy roughing cuts.

Search

Largest Manufacturing Technology Community on the Web

Search

OKUMA CROWN OSP700L 2axis lathe, BRAOCHING?

Fred Rezfield

Plastic

Dan from Oakland

Titanium

cunaf85

Plastic

Houndogforever

Hot Rolled

Fred Rezfield

Plastic

Fred Rezfield

Plastic

Jashley73

Titanium

Similar threads