I don't disagree that for complex parts like your example 3D printing is an
amazing way to do this. I'll bet though if you went out to buy say a drill
press and had a choice between one that had been cast with ugly rough 3D
printed castings and one that had smooth pattern created castings you'd choose
the nicer one?John. Sent from my Samsung S10
-------- Original message --------From: Chris Albertson
<[email protected]> Date: 2021-06-15 11:24 a.m. (GMT-08:00) To:
"Enhanced Machine Controller (EMC)" <[email protected]> Subject:
Re: [Emc-users] Spindle Control On Tue, Jun 15, 2021 at 9:41 AM John Dammeyer
<[email protected]>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:[email protected]]> > 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
<[email protected]>> 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 notwaste material and it is
very fast because there is no machining required. But more importently some
moulds can not be CNC machined or rather youmight be forced to re-design you
part based on the limitations of the CNCmachne. For example JUST TRY to CNC
a mold for this part. It is areal part I made for a power steering unit for
robot car. I doubt it couldbe CNC machined. But it could be 3D printed and
cast in metal. (This isthe main chassis that holds the motor, gears and some
electronics. In usethere are covers to keep water and dirt out. Butthis
inside is designedfor minium use of materials and is not buildable with CNC,
Look at thebrown 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> > [email protected]> >
https://lists.sourceforge.net/lists/listinfo/emc-users>>>>
_______________________________________________> Emc-users mailing list>
[email protected]>
https://lists.sourceforge.net/lists/listinfo/emc-users>-- Chris
AlbertsonRedondo Beach,
California_______________________________________________Emc-users mailing
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