hey Jonathan here the Colfax High woodshop and Mill today I was going to use
mastercam in my forest scientific CNC router cut out a trophy base like this
out of a block of wood like this so stay tuned and I'll show you how to cut this
okay I just want to go over how you'd make a trophy base like this on a CNC
router it's a beautiful block of wood really clean these are both pockets of
multiple depths the first thing you really do before you make a trophy like
this is you get your stock and you just kind of lay it out first then you figure
out what tools you're going to use what CNC you're going to use and what cutter
probably the best cutter to use on this is a large half inch flat end mill with
four flutes and up spiral bit I'm taking out so much wood I want those
chips to come up and out so I sketch it out first
to make sure it matches the trophy there are two different dimensions one is your
depth and then the second is your diameter so this top pocket right here
is a 6-inch diameter so a depth of a quarter-inch and then the second one is
four and 3/8 inch diameter for an additional three quarters of an inch
okay so I'm just gonna really do that in master cam really quick so everything in
master cam you really start with what type a machine you're using we're using
the router techno servo if this isn't selected your posts won't work and then
once I have my machine tight then I go to my properties stock setup the best
way to set this stock up is the center rather than the lower left-hand corner a
block of wood is 10 by 10 and then few inches thick
I'm calling the top of stock zero so I'm going to go down into it by negative
values if I want to display see that on my screen I click display f9 or my
Cartesian coordinate axes and now I'm ready to start drawing first thing I'm
going to do is I'm going to create an arc from the center point I'm going to
snap it here I'm going to do the larger circle first it's a 6 inch diameter so I
set that diameter it's six and click green checkmark is done up
here is Fitz green I'm gonna go to create arc circle from the center point
this is my smaller circle it's four and three eighths of an inch diameter so for
space 3/8 it'll take that fractional measurement and convert it and that's
really the end of my geometry I do need to think about machining this first I'm
going to actually do this larger circle first and then I'm going to do the
second circle next I am going to kind of spend a little bit time cutting through
the air for the top quarter end again I'm going to use a half inch flat end
mill my geometry is all done so I go to tool path this is going to be a pocket I
name that pocket I'm going to select it with the chain the compensation type and
direction and travel is not important because the definition of a pocket is
inside the line so I'm going to pocket that now I'm going to set my parameters
for cutting the tool again it's going to be a half inch half inch straight bit
I'm going to set this yeah I think 1:26 see that's my feed rate it's kind of
fast but there's going to be a lot of overlap when I when it runs and then
plunge rates half that I worked my way down this column nothing to do there cut
parameters this right here is how much of the overlap I could set roughing
finishing I want my final pass to be finished so that'll make a nice clean
cut we didn't lead out is deselected already because it's a pocket depth of
cut I select this even though I do this more as a safety point fives a lot
break through linking parameters and I these are all absolute and then this is
the larger circle right so that larger circle is to adapt a negative 0.25
there's my first tool path it's kind of hard for me to see my second tool path I
go over here and this will make it non visible again I'm going to go to tool
path pocket as a chain and I select that inside circle tool it is a half inch
straight bit I'm gonna go one twenty sixty older Cup Ramblers this should
hold all my previous settings these are different ways I could cut cut that
pocket out and now I have the same depth I'm going to have the same height so
this one I'm actually going to go negative one inch for the first part of
it the first quarter inch it's going to cut this through air everybody good on
all those settings it's a lot to go down a half inch so I think I'm actually
going to go back here to depth of cut and I'm going to set this more like
point four it'll actually do equal amounts but now it's going to do a third
of an inch on each pass so better to be safe so only one of these is selected
that'll select them both those are my tool path I want to verify it make sure
it looks right I've verified in an isometric view I want to make sure it
cuts to hurt the wider circle first it did and then the second circle so that
all looks good I'm going to save that file and then I go to g1 and I post it
got a double check it here techno step that's correct
I'm gonna put on the flash drive and then what it's doing now is taking
all our vector information weight which is a tremendous amount so I'm cutting
these pockets and it's converting it into g-code and then here's my code here
just like the code we wrote right rapid travel to that coordinate g9 TGA T and
then you can see here cuz there's so much toolbar thing this has 900 line 920
lines of code all right well let's go in the shop and run this part here it is on
the flash drive loaded it onto the computer that
actually drives a forest scientific I have it down with plywood cleats
double-sided tape there's my half inch flattened up spiral bit I also have a
vacuum table so I'm going to turn that on as well and I'm gonna put the dust
shroud on