Hi I'm Steve Moriarty and this is part three of our lessons in gem cutting and
today we're going to talk about the machine itself and what the parts are
all machines are going to vary slightly but they're all can also do the same
thing so so I start with this is the mast of the machine and it's responsible
for the height that that the stone is that which will help you get the angle
that you want this is the main height adjustment and this is the the finer
adjustment
so this dial here is the dial gauge some machines have a digital gauge others do
not have this gauge but this is helpful in the final adjustment when you're
cutting and when it if you're set up right when it gets to zero that's where
your facets should be in the correct position this is the protractor this one
splits it up into every five degrees so if you want to cut it 43 degrees this is
the main setting this is 40 and here the fine setting this breaks five degrees
into 50 individual markings so you to get 43 degrees you set this to 40 and
set this to three and that will give you 43 degrees here's your index gear index
gears vary they can be 16 index you can have 32 64 70 to 80 this is a 96 index
so it's broken up into 96 separate settings and this allows you to find the
place to put your facet this is the release when you use this just make sure
it gets into the divot correctly the right index because you can see you can
it can get set in between and you have to make sure it's in the right position
this is your cheater right now it's cheated way left and this
is the setting so when you start out to try and set it to the center point and
this gives you some cheat when your facets not quite in the right position
this is how you adjust the facet ideally you don't have to use the
cheater but you'll find over time you'll use it over and over again so this is
the quill of the machine and here's where you put your dot the top of mine
are keyed most of them are keyed some way this one so you slip it in and you
tighten the setscrew and then you tighten the nut at the end
of the quilt make sure they're good and tight and then your Dopp is in position
and ready to cut so this on the on the the mask this is how you move it in and
out of the machine and position for position onto the cutting lap this is
how you tighten it in all these these settings this this piece you want to
make sure everything is tight before you start so one thing to be concerned about
when you're setting where your mass position is you do want to use as much
of the lap as possible but there is a risky area and that's down here when
you're cutting if you try and use too far in you can end up catching the
center nut which will damage your stone when cutting so you're better off out
little ways eventually you're going to want to use this because after you've
worn out the rest of it this is going to be a very good place to cut much sharper
but you have to be careful at that position
so this is the water that's going to clear the swamp off your cutting lap as
your cut it's going to build up so you just set the water when you're cutting
on a coarse lap you'll need more water and a fine lap you'll need less water so
that's gonna clean the material off your lap
it goes into the jerk pan this this you'll generally have blocking this
position this is when you're cutting the girdle that you'll need this open so you
close this so the water stays in water goes in here goes to a drain into a
bucket beneath your desk
here's your speed
and it also this one has a reverse you can
just by flipping the switch run the opposite sometimes there's a Danny
running the opposite direction you can it may cut better in a different
direction you can also change direction by just changing position on a lap when
you cut on this side it is actually cut in one direction you cut this side and
it cuts another direction and that becomes a benefit particularly in Polish
when it's not polishing correctly you sometimes want to change the direction
of the Polish and you'll find that will assist you in getting a good polish the
way fishing in the lamp will become key and see you know during cutting you may
have to move it just so you can get another position on the stone
particularly when you're trying to check your polish so now that you're familiar
with the machine our next video will be cutting the pavilion of the citrine into
a round Braille thanks again for watching
Steve Moriarty from Moriarty's Jim are