John I buy dlc costed aluminium end Mills. From my Chinese supplier.
In my Linuxcnc controlled machine I use these feeds and speeds. For a 3 flute 10mm dia cutter. With Dlc. (diamand like coating) High speed aka fusion 360 adaptive clearing Depth of cut 25mm Side width of cut. 2mm 10k rpm 0.15 chip per tooth so 4500mm/min feedrate Slotting Depth of cut 10 10k rpm 0.05 chip per tooth so 1500mm/min feedrate The cutters last for months of constant use. And are like 10 times better than the high speed cutters you are running. Plus it's much harder to overheat the carbide. Than HSS. For reference you can buy a 10mm cutter for about 30 usd each. 6mm cost about 15 usd. I get a decent discount on that. But we are to far apart in the world for be to send them to you. (new Zealand So in a nut shell. Try some new cutters. I'm running flood coolant. But I think a mist would be almost as good as the Dlc coating is pretty amazing Feel free to pm anyone for links On Thu, 4 Nov 2021, 19:36 John Dammeyer, <jo...@autoartisans.com> wrote: > I used the big 1/2" one for the large pocket and the smaller 5mm one for > the smaller pocket and profile. The surface finish, given my crappy cast > aluminium, was really nice. > > My mill does have a coolant pump but I don't know if I use the mill often > enough to fill the reservoir with coolant that then goes mouldy and > stinky. So I'm working on a compressed air mist coolant system. But maybe > having a secondary reservoir that pumps out the main one and adds an > aquarium bubbler would work for the flood system. So in the last 12 years > I've never used coolant. > > John > > > > -----Original Message----- > > From: andrew beck [mailto:andrewbeck0...@gmail.com] > > Sent: November-03-21 10:52 PM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Project Progress > > > > 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 > _______________________________________________ > 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
