[machinebob1]

Can anyone help me out with a thread milling CAN cycle for okuma. Looked through the books I have and can't seem to find it.

[deadlykitten]

hi bob lathe / mill ?

all you need is a helix cycle; if there is a tool with :
... a single row of teeth ( image 01 ), and :
...... through hole, consider a linear-lead-out movement
...... blind hole, consider a radius-lead-out movement, so to achieve a smooth tool disengage from the material
... multiple rows of teeth ( image 02 ) : only radius lead-in and radius lead-out

if pitch<>lead, then you need to phase shift the helix start :
... on a lathe, if the thread is :
...... coaxial with the S axis, than simply change C origin
...... not coaxial with the S axis, than you need to rotate program coordinates ( rebuild the program ), or change Z start
... on a mill, simply use G11 P

each pass requires a helix with a bigger radius

if you wish, repeat the last helix, so to achieve spring passes / kindly

[deadlykitten]

one more thing : like any other tool, also thread milling is subject to vibrations when the tool is entering the material

pls check the paragraph " entrance into cut " from here: https://www.sandvik.coromant.com/en-...tion-tips.aspx

a while ago i have found a better document about this, but i lost it

google " vardex tmdr " / kindly