I believe G95 mode (feed per revolution) is handy for a lathe. Particularly for a cut-off. You directly set the chip thickness and keep it when rpm changes.
BTW 2ipm with 2000rpm corresponds to 1 thou per rev... not 10-20 thou? -- Andrew 2015-06-30 17:53 GMT+03:00 Tom Easterday <[email protected]>: > I am learning to use a CNC lathe. I like to learn from the mistake’s of > others by repeating them myself ;-) I am cutting medium carbon steel > (medium because I don’t really know what it is - not stainless, not tool > steel, turns/faces easily enough). I have a narrow (0.088”) cutoff bar > with a carbide insert. I used a program that I have called GWizard to get > feeds and speeds and on it’s conservative setting for carbide cutoff tool > in medium carbon steel it recommended 2000rpm and 2ipm. That was a > disaster. It started off cutting a very heavy chip (10-20 thou thick) got > about 1/3 into my 0.5” dia piece and then pushed it’s way to destroying the > insert and bending the opening on the tool that holds the insert. What is > the opposite of “just in time”? Well, that is when I hit estop. Luckily I > have two ends on this cutoff tool so I have one more chance :-) > > I know I need to cut off as close to the spindle as possible. I know that > cutting fluid is good thing, though I don’t have flood so will just be > spraying or dripping something on it. But what would be good F&S for doing > this? A “machinist” recommended 600rpm and 0.6ipm using his rule-of-thumb > machining formula…? > > Also, I believe I can do CSS but don’t really know anything about that > yet, was just trying to do basic things first but if css would be > better…Any advice would be welcome. > > -Tom > > > > ------------------------------------------------------------------------------ > Don't Limit Your Business. Reach for the Cloud. > GigeNET's Cloud Solutions provide you with the tools and support that > you need to offload your IT needs and focus on growing your business. > Configured For All Businesses. Start Your Cloud Today. > https://www.gigenetcloud.com/ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Don't Limit Your Business. Reach for the Cloud. GigeNET's Cloud Solutions provide you with the tools and support that you need to offload your IT needs and focus on growing your business. Configured For All Businesses. Start Your Cloud Today. https://www.gigenetcloud.com/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
