> -----Original Message----- > From: Sam Sokolik [mailto:samco...@gmail.com] > > we have various forms of these type calculators that seem to work well > > https://www.ebay.com/itm/Vintage-Valenite-SPEED-AND-FEED-CALCULATOR-1981-Datailzer-Slide- > Charts/164146745960?hash=item2637e89268:g:V~oAAOSwIGleb93M
I have the machinst tool box program that I use as a starting point. So many of these appear to be targeted at the production shop. So I often cut the feed rates in half leaving the spindle at the required setting. Maybe both need to be slowed? Or maybe my system still has too much slop. And I don't think one should plunge into HRS with a 4 flute mill. Clearly I went in too fast. After the first one broke I was frustrated and continued on without changing things. This all happened at the same time as my Z axis Gecko Failure. So I was very impatient to get the work done. Should have taken a step back. John > > On Tue, Apr 14, 2020 at 12:50 PM John Dammeyer <jo...@autoartisans.com> > wrote: > > > Thanks. The last bit of LinuxCNC milling with a 6mm carbide plunging into > > HRS broke two of them. I'm really not doing this right yet. So any > > examples of feeds, speeds and coolant are really helpful. > > > > John Dammeyer > > > > > -----Original Message----- > > > From: Sam Sokolik [mailto:samco...@gmail.com] > > > Sent: April-14-20 10:38 AM > > > To: Enhanced Machine Controller (EMC) > > > Subject: Re: [Emc-users] Non-circular boring. Linuxcnc style. > > > > > > sorry - forgot a few things.. The mill was a resharpened at about .47". > > > (why it took 2 tries to get the size where I wanted it) the timing gear > > > was aluminum. > > > > > > On Tue, Apr 14, 2020 at 12:26 PM Ed <ate...@mwt.net> wrote: > > > > > > > On 4/14/20 9:53 AM, Sam Sokolik wrote: > > > > > now to upgrade the spindle encoder... > > > > > > > > > > https://youtu.be/VmWeXS6y-lg > > > > > > > > > > On Fri, Apr 10, 2020 at 9:00 PM andy pugh <bodge...@gmail.com> > > wrote: > > > > > > > > > >> On Sat, 11 Apr 2020 at 02:50, Ed <ate...@mwt.net> wrote: > > > > >> > > > > >>> I'm thinking gear hobs or single cutters. > > > > >> I have been thinking of making gear hobs this way for a while. What > > > > >> holds me back is that I am not sure that I know how to heat treat > > the > > > > >> hob to a state that will cut the materials that I want to make gears > > > > >> out of. > > > > >> > > > > >> -- > > > > > > > > Heat treating D2 is not a problem here and would work well if a little > > > > slower than M2 high speed. A higher temp furnace is in the plans. I > > keep > > > > some D2 on hand. > > > > > > > > I am being pushed by a couple customers to get my horizontal/hobbing > > > > machine finished and that will be able to do this kind of work. Soon I > > > > will be paging Andy to help with the setup. :-) > > > > > > > > Ed. > > > > > > > > > > > > > > > > > > > > _______________________________________________ > > > > 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 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
