What cutters are you using? As a sideline here in New Zealand I buy and sell tooling so I'm always testing the limits.
And can probably advise a bit On Thu, 4 Nov 2021, 11:29 John Dammeyer, <jo...@autoartisans.com> wrote: > I've been using LCNC quite a bit (for me). In the photo there are two > steel spring collars that were entirely done with the mill. I could have > left them as large disks with just a stepped hole and the set screw holes > but what's the fun in that. > > > http://www.autoartisans.com/mill/SpindleControl/TrialFitOnSpindleCover-1.jpg > > The spindle cover casting (10lbs of scrap aluminium) was machined in the > places I needed flat surfaces and to get rid of a bit of sag in the casting > mostly for looks. I'd occasionally spray a bit of WD-40 but mostly just > held the shop vac to clean up the chips. > > http://www.autoartisans.com/mill/SpindleControl/SpindleCoverplate-4.jpg > > Essentially between 1000 and 2000 RPM, 2 flute 1/2" end mill, 25% step > over, about 2.5 to 5 IPM IPM and a depth of cut of about 0.1" for each > pass. This created chips that did not melt onto the tool bit and left a > quite nice smooth finish. > > But with those parameters it did take quite a while. OTOH, it ran > automatically and other than check on it periodically and vacuum or blow > away chips I could do other things nearby. > > If I enter the parameters into Machinist Toolbox with a target RPM of 1500 > I see it suggests a tool feed rate of 21 IPM. I think that would melt the > chips without flood coolant. Since I didn't want to screw it up and have > to cast it all over again I was very conservative. > > Was I too conservative on this? It's been suggested by a friend who runs > MACH3 that he dials in a much faster feed and spindle rate and then hauls > back on the sliders to reduce it to very slow and then in small steps bumps > up the speed until it feels right. > > > > Suggestions are welcome. > Thanks > John > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
