On Tue, Jun 15, 2021 at 9:41 AM John Dammeyer <jo...@autoartisans.com> wrote:
> Before the extruded plastic 3D printing that was the type of 3D printer I > was considering. The hobby approach was to use ink jet nozzles for > printing a crazy glue type material onto starch layers. > > Material costs would not be cheap. Then came pla printing and I've not > looked back. I've printed a number of PLA patterns but they always get the > woodworking treatment so they are never lost-pla. > > John > > > > -----Original Message----- > > From: andy pugh [mailto:bodge...@gmail.com] > > Sent: June-15-21 7:26 AM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Spindle Control > > > > On Tue, 15 Jun 2021 at 15:21, Roland Jollivet <roland.jolli...@gmail.com> > wrote: > > > > > Which often makes me wonder why guys aren't CNC machining the moulds > rather. > > > You'd have a simple CNC mill where the tool sticks directly upwards, > and > > > use a dremel as a spindle. > > > Now you just 'machine' away the green sand until done. > Why would you CNC a mould when you could print one? The printer does not waste material and it is very fast because there is no machining required. But more importently some moulds can not be CNC machined or rather you might be forced to re-design you part based on the limitations of the CNC machne. For example JUST TRY to CNC a mold for this part. It is a real part I made for a power steering unit for robot car. I doubt it could be CNC machined. But it could be 3D printed and cast in metal. (This is the main chassis that holds the motor, gears and some electronics. In use there are covers to keep water and dirt out. Butthis inside is designed for minium use of materials and is not buildable with CNC, Look at the brown part, I forget to remove some other parts.) [image: Untitled.jpeg.jpeg] > > > > > > We have a couple of these at work: https://youtu.be/s6OJx_PKoTk > > > > -- > > atp > > "A motorcycle is a bicycle with a pandemonium attachment and is > > designed for the especial use of mechanical geniuses, daredevils and > > lunatics." > > � George Fitch, Atlanta Constitution Newspaper, 1912 > > > > > > _______________________________________________ > > 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 > -- Chris Albertson Redondo Beach, California
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