On Thursday 18 April 2019 16:44:40 Roland Jollivet wrote: > Hi All > > The current discussion on making an ATC for ER collet style spindles > has given me an idea. > As Gene aptly says, R8 and ER collets weren't designed with ATC's in > mind. > > In the application of routing, engraving and other light duty > machining, the assembly of ER collet, nut and tool could be reduced to > a simple screw-on tool holder. > The collet itself would be dispensed with and the nut itself becomes a > tool holder, with a Weldon style nose. Mostly it relies on the nut > mating with the face of the spindle. > > I have attached two pictures(not to scale) showing how it might look, > using a simple D bit, and where the second toolholder has a core that > engages with the cone of the spindle for heavier duty tooling. > A dozen of these could be machined by the user to take various tools. > Obviously this design is to used on the Hackaday or similar ATC > > https://ibb.co/6vpFs97 > https://ibb.co/dpwVLkB > > Thoughts??
Looks quite usable for engraving duties. But I'd be a bit spooky about the setscrews long term grip, and would favor a dimple in the side of the tool to foolproof it a bit. Cutting duties with 6mm end mills would still need a collets death grip I think. YMMV of course. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
