On 12/10/2013 10:50 AM, Dave Cole wrote: > I've got an Erickson QC30 on my Bridgeport CNC mill. > R8 does not maintain any accurate Z reference after a tool change. > So while you can change tools quickly, how much time does re-referencing > the Z axis use on repetitive parts? > > Dave > > On 12/10/2013 12:56 PM, Stephen Dubovsky wrote: >> Im not sure I'd go that far (and Im an owner of both). NMTB/QC30 has >> positive drive but a R8 power drawbar absolutely whoops QC30 in tool change >> speed & ease. Push button vs having to yank on a wrench both in and out. >> Its not really an improvement. >> >> SMD
My random thoughts. I have just started using the R8/Tormach toolholding system and find it far more convenient than plain R8. Changes are as fast as grab a wrench, loosen draw bar enough to slide tool holder out, put next holder in, tighten, done. It features repeatable Z offsets, and offsets can also be set off the machine without a special tool holder holder. A power draw bar really isn't needed unless one has an automatic tool changer. The only down side might be that R8 is not as strong as 30 taper, but the Tormach version is stronger than plain R8. I would, given a large budget, prefer 30 or 40 taper with a power draw bar. I believe a Quick Change spindle can be drilled to use normal (CAT, BT, NMTB) taper holders with a draw bar. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/ ------------------------------------------------------------------------------ Rapidly troubleshoot problems before they affect your business. Most IT organizations don't have a clear picture of how application performance affects their revenue. With AppDynamics, you get 100% visibility into your Java,.NET, & PHP application. Start your 15-day FREE TRIAL of AppDynamics Pro! http://pubads.g.doubleclick.net/gampad/clk?id=84349831&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
