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From YouTube: Geardowns - OSE Design Guide
Description
https://wiki.opensourceecology.org/wiki/OSE_Design_Manual_-_Geardowns
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A
Starting
recording
just
to
make
sure
I
do
that
so
welcome
everybody.
Today,
eight
of
nine
of
the
open-source
microfactory
steam
camp.
What
an
experience!
First
of
all
the
base
flew
like
like
that
I
think
altogether,
pretty
pretty
interesting,
amazing
and
definitely
the
full
of
gonna
test
your
grit
for
surviving
through
everything
that
goes
wrong,
because,
when
you're
building
things
we're
designing
and
building
at
the
same
time,
so
obviously
you're
gonna
have
a
lot
of
things
that
you
don't
account
for
and
it's
all
the
time
on
your
feed
creative
process.
A
But
the
thing
that
I
have
learned
through
this
process
is
that
there
are
reasons
why
things
happen.
There's
no
not
really
such
thing
as
magic
when
it
comes
to
technology,
because
there's
the
complexity
comes
in.
Where
there's
just
a
lot
of
elements
you
have
to
keep
track
of,
but
then
you
simply
have
to
think
stop
and
think
back
about
it
problem-solve
on
your
feet.
So
that's
in
that
way
we're
doing
that.
A
lot
of
people
are
getting
a
lot
of
different
skills,
so
I
like
that
part
and
I
think
with
the
printers.
A
B
A
So
we
built
our
nichrome
heaters,
it
works
really
well
and
it's
insulated
so
uses
between
30
and
40
percent,
less
energy
for
printing,
which
over
time,
if
you're
in
production
that
matters
and
then
the
fast
heat
up
time
is
a
good
feature,
because
it's
about
a
minute
faster
than
the
actual
extruder
heating
up,
which
is
which
doesn't
happen
on
any
printer
ex.
That
I
know
of,
except
maybe
for
ultra
maker,
a
company
from
the
Netherlands.
A
So
moving
on
here,
I've
got
a
pop
quiz
because
in
the
last
four
days
we've
covered
some
topics,
but
if
you
actually
review
the
material
and
if
you
have
paid
attention
and
you
kind
of
have
to
review
it
cuz.
This
is
a
total
crash
course
and
everything.
But
there
are
a
few
things
that
you
can
do
so.
The
tasks
I've
got
four
tasks
for
everybody
in
the
audience
in
here
to
follow
up
on
one.
C
A
D
A
A
One
third
challenge
once
again,
with
the
3d
printers
right
now,
using
the
exact
same
Universal
axes
that
we've
done,
you
can
make
the
same
printer
that
we
have
all
the
same
components,
just
scale
up
the
side
scale
of
the
frame
and
make
a
3d
printer
with
a
two
foot
bed
that
actually
works.
The
hint
there
is.
You
probably
will
not
want
to
lift
the
bed
itself,
which
is
start.
Gonna
get
start
to
get
heavy,
so
you
probably
want
to
lift
the
geometry.
You
know
you
can
modify
the
universal
axis
so.
A
Such
as
that
you're
lifting
the
axes,
not
the
bed,
because
the
bed
itself
is
gonna,
be
metal
and
heavy.
You
know
it
gets
to
be
like
maybe
50
pounds,
especially
if
it's
insulated,
but
you
can
use
the
same
part
so,
but
you
probably
want
to
move
the
axes
up
and
down.
Okay
question
number
4:
we
talked
very
briefly
about
electronics,
but
the
challenge
is
out
there.
I
still
think
it's
possible,
but
to
build
a
200
amp
power
supply
for
a
welder
for
20
dollars,
starting
with
the
universal
controller.
A
And
then
you
have
an
enclosure,
cooling
and
enclosure,
cooling
wiring.
But
the
idea
of
using
a
very
BP
transistor,
which
they
cost
like
a
dollar
for
10
kilowatts,
these
days
for
robust
power
handling
using
Arduino
to
switch
that
rapidly
as
you
rectify
240
volts
from
the
wall
get
240
DC,
and
do
this
fast,
switching
to
reduce
that
down
to
a
manageable
voltage.
Would
that
work,
possibly
so
grant
challenge
design
a
$20,
200
amp,
welder
power
supply?
Okay,
that's
it
so
just
things
to
think
about
it
and
a
good
solution
would
be
like
even
on.
A
The
last
question
is
to
find
okay.
Well,
actually,
that's
not
doable
without
doing
that.
Well,
that's
the
answer
to
that
question
and
it
would
be
a
great
input
for
the
project
in
general
because
after
all,
we
do
have
access
to
do
high
technology
items
right
now,
field
effect,
transistors,
isolated
gate,
bipolar,
transistors,
various
transistors
that
are
super
low
cost
in
the
hand,
hand
a
lot
of
power
alright.
So
let's
move
on
to
the
lesson
for
today,
which
is
gear
down
so
they're
fun,
because
you
couldn't
do
a
lot
of
practical
things
with
them.
A
A
A
That's
called
mechanical
advantage.
You
have
a
lever,
you
have
a
mechanical
advantage
by,
for
example,
gears
meshing
from
one
size
to
the
next
by
different
means.
You
can
get
leverage
to
simply
expand
force
to
move
great
things
and
now
you're,
not
you
have
to
consider
conservation
of
power
and
energy
that
is
energy
is
conserved.
You
cannot
create
or
destroy
it,
but
you
can.
You
can
scale
force
force
is
not
conservative,
but
energy
is
practical,
little
application.
So
you
see
this
guy
right
here.
A
Well,
at
the
Aussie
workshop
we
might
be
doing
this
moving
a
power
cube
with
a
lever,
so
I
mean
I
did
exactly
that.
You
take
a
500-pound
power,
cube
that
we
want
to
move
around
the
shop.
I
got
to
move
it
to
the
other
corner
and
I'm,
not
using
a
hoist.
I
did
actually
exactly
that.
I
would
put
a
block
of
metal
under
its
corner
and
because
the
power
cube
is
has
kind
of
got
tubing,
that's
raised
up,
I
can
get
on
to
it
and
just
very
easily
use.
A
Like
a
you
know,
six
foot
rod
lift
on
it
an
inch
of
inch
by
inch
just
like,
like
a
can
opener
inch
inch
engine,
you
can
move
it
along,
so
you
have
to
consider
that,
because
for
practical
applications,
if
you're
working
in
the
shop
or
you're
designing
technology,
you
want
to
make
it
such
that
you
can
move
it,
but
certainly
a
lot
of
things
will
be
heavier
than
you
can
move.
So
you
got
to
go
to
mechanical
advantage.
So
what
does
it
gear
down?
A
Oh
dear
down,
we
mean
a
gear
down
or
a
gear
up,
so
if
you're
driving
a
larger
gear,
you're
slowing
it
down,
if
the
larger
gears
is
driving
a
smaller
one,
it's
speeding
it
up.
So,
as
you
see,
their
energy
is
conserved.
Energy
use
put
into
the
system
one
gear
simply
transfers
that
energy,
it
does
not
create
it.
Power
is
the
energy
over
time.
How
fast
you
using
that
energy?
That's
also
conserved,
but
the
speed
is
not,
nor
is
the
force.
A
A
A
What
are
the
applications?
We've
seen
in
our
systems
here
seen
a
lot
of
a
lot
of
different
applications
like
in
the
3d
printers,
it's
very
common
to
have
gear
down
extruders
our
extruder
that
we're
using
right
now
is
geared
down.
There's
a
small
small
driver
on
the
stepper
motor
NEMA
17
driving
a
larger
one.
That's
then
feeding
the
filament
because
for
3d
3d,
printing
filament,
that's
three
millimeters
large.
A
You
need
so
much
force
that
a
little
NEMA
17
may
not
necessarily
provide
it,
because
you
want
to
be
pressing
through
the
melt
zone
and
requires
a
certain
power
to
do
that.
Robotic
arms.
The
robotic
arm
is
part
of
the
global
village
construction
set.
That
certainly
is
an
application
of
gear
downs.
Where,
if
you
look
at,
for
example,
this
one
this
is
what's
it
called?
Is
this
Thor?
This
is
not
door.
This
is
one
of
one
robotic
arm:
that's
open
source,
3d
printable,
but
you
see
these
fat,
these
fat
business
3d
printed
people.
E
A
These
are
all
the
iterations
from
the
same
guy,
so
it's
I
mean
this
is
scale
it
up.
They
put
a
larger
stepper
motor,
like
we've,
got
on
a
heavy-duty
CNC
mill
that
we're
building
right
now
and
man.
You
can
do
practical
stuff
here,
but
once
again
you
notice,
why
do
we
want
these
fat
nozzles
of
one
point
two
millimeters?
This
is
by
the
way.
The
first
time
we
are
working
with
1.2
millimeter
nozzles
we're
having
some
issues
with
sticking
to
the
bed
and
stuff
like
that
largest.
A
We
did
was
point
eight
millimeters
to
date,
but
you
can
start
scaling
these
things
up.
So
one
point
two
millimeters
compared
to
point
four
millimeters.
How
much
faster
is
the
one
point.
Two
then
point:
four,
it's
nine
PI
r-squared
is
the
area
of
a
filament
feeding
through
the
nozzle.
So
it's
not
goes
as
R
squared
the
radius
of
the
nozzle
squared
you
can
have
shredders
like
the
precious
plastic
shredder.
A
A
A
tiny
pump
with
very
tiny
displacement,
so
you're
moving
like
small
amounts
of
fluid
at
high
pressure,
so
actually
amplifying
the
torque
of
the
motor
by
a
factor
of
like
10
or
so,
by
using
a
hydraulic
pump
so
yeah.
So
in
this
example,
here
we've
got
because
we're
using
actually
these
these
much
smaller
hydraulic
wheel
motors.
We
only
have
about
2,000
pounds
of
pushing
force,
which
means
that
if
you're
going
into
playing
dirt,
you
know
you're
gonna
get
bogged
down.
A
A
And
how
does
it
work
that
to
explain
this
concept
so
using
a
large
engine
in
the
little
gears
inside
those
pumps
are
only
like
an
inch
across
this
and
real
size,
something
like
one
or
two
inches
across
so
very
tiny
amounts
of
fluid,
but
because
you're
moving
such
amount
of
such
small
amounts
of
fluid.
With
such
a
large
force,
they
go
way
up
in
pressure.
So
that's
that's.
A
E
A
Yeah
yeah,
so
if
you
notice
on
this
pump
here,
because
your
your
you're
going
again
the
you
know,
the
teeth
are
going
as
close
to
the
radius
as
possible.
Otherwise
the
fluid
would
leak.
So
these
are
actually
a
higher
requirements
than
typical
gears.
Hydraulics
do
have
some
requirements,
so
what
that
means
is,
if
you
don't
have
the
tight
requirements,
you're
just
gonna
be
less
efficient,
you're
gonna
be
pumping,
but
you're
gonna
be
leaking
some
of
this
out
out.
A
Besides
and
that's
one
style
of
a
pump
there's
other
types
of
pumps,
you
can
think
about
so
gear
down
versus
gear.
Up
conservation
of
energy
can
be
going
faster
or
slower
for
higher
or
lower
torque
selection
criteria
by
required
force.
You
take
a
look
at
a
lot
of
times.
You
start
I've
got
this
engine
or
I've
got
this
motor.
Then
you
have
to
your
selection.
You
have
to
think
about
okay
and
I
kind
of
gear,
down
that
I'm
gonna
use.
A
A
So
you
have
to
look
at
the
basic
properties
of
the
system,
you're
working
with
and
sighs
the
things
accordingly,
if
you're
doing
the
bulldozer,
drive,
you're,
not
gonna,
use
rubber
belts,
but
you
may
use
like
large
rubber
printed
gears,
perhaps
even
but
really
pushing
for
maybe
for
toy
for,
like
small,
robotic
tractors
yeah,
you
could
probably
do
that,
but
for
a
bulldozer,
rubber,
probably
won't
cut
it
so
select
your
materials
accordingly,
basic
calculations.
Gear
down
is
works
such
as
it's
stacks.
It
multiplies
so
gear
down.
A
Is
the
ratio
of
the
first
gear
down,
so
you
have
a
two
gear
system
times
the
second
gear
times
the
next
and
the
next?
So
it
multiplies.
So
if
you
you're,
gearing
down
in
a
gear
train,
take
a
look
at
this
gear,
train
in
Wikipedia,
say:
you're
driving!
So
take
this
middle
wheel.
Here
it's
got
these
small
teeth
rubbing
against
this
much
larger
diameter
there.
So
that
may
be
like
1
2
3
4,
like
6
fold
gear
down.
A
Well,
you
put
another
one
of
those
set
of
gears
on
this
one
here:
the
larger
wheel
and
drive
the
next
wheel
in
series
and
that
multiplies
so
save
got
six
here.
You
get
36
on
the
second
one
and
thirty
six
times
six
about
200
after
the
third
one.
So
you
see
how
this
can
scale
very,
very
much
so
by
multiplication.
A
Now
the
property,
that's
would
be
required.
The
teeth
on
us.
Each
successive
wheel
would
have
to
probably
get
enlarged
or
make
that
meshing
like
enlarge
those
gears,
because
they're
gonna
be
handling
much
more
force
than
at
first
gear
right
there.
But
you
can
do
this
or
ad
infinitum
so
up
to
things
like
this.
This
is
a
hand
over.
A
Take
steel
thinner
than
two
powders-
and
this
is
the
basis
of
industrial
process
like
this-
is
cement
production
with
a
cordless
cement
producer
that
you
just
baked
in
a
in
your
solar
furnace,
okay
and
I
I've
played
with
the
idea
of
a
NEMA
17
motor
doing
this,
but
I
actually
do
the
calculations.
So
we
learned
a
little
bit
about
force
and
energy
yesterday,
so
you
can
take
a
look
at
a
rock
crusher
like
this.
A
All
that
thing
has
a
production
rate
of
one
one
ton
per
kilowatt
hour,
so
you
put
in
one
kilowatt
hour.
It
gets
one
ton
of
material.
A
NEMA
17
has
10
watts
a
hundred
times
less.
That
thing
is
multiple
kilowatts.
It's
not
like
one
peel,
as
many
maybe
looks
like
a
hundred
kilowatt
of
rock
crusher,
go
through
the
numbers
and
if
you
scale
that,
assuming
that
your
gear
train
is
reasonably
efficient,
you're
gonna
get
250
Q.
This
is
a
hundred
percent
efficient,
so
it's
not
gonna
be
a
hundred
percent
efficient.
A
A
I,
don't
think
so.
Have
you
ever
tried
to
spin
to
give
you
an
example?
Why
that's
not
true?
Have
you
ever
tried
to
spin
a
like
a
very
fast
like,
for
example,
even
a
watch
like
I
know.
Watch
it's
got
a
tiny
spring.
That's
got
tiny
amount
of
force.
Have
you
ever
tried
to
spin
the
handles
back?
You
can't
it's
it's
like
locked
up,
because
there's
so
much
force
you
have
to
overcome
or.
A
What
you're
talking
about
is
the
loss
at
every
transmission
stage,
so
if
you've
got
say
a
10-fold
gear
down
on
one
a
10-fold
gear
down
on
another,
you
need
three
three
trains
of
10-fold
gear
down
from
a
NEMA
17
10
times
10
times
10
well,
in
this
case
from
10
kilowatts
from
10
watts
to
1
kilowatt.
That's
only
a
hundred
times,
so
you
got
to
gear
down
say
each
one
is
a
factor
of
10.
A
You've
got
a
small
pulley
going
into
a
ten
times
larger
one
and
a
small
one,
going
to
a
ten
times
larger
one
again.
Well,
the
efficiency
of
transmission
is
on
on
the
order
of
say,
80,
90
percent.
So
say
you
got.
You
know
something
like
80
90
for
the
belts.
I
think
I'm
not
sure
what
the
belt
deficiency
is,
but
I
think
it's
in
a
90
like
mid
90s
for
the
NEMA
for
the
gt2
belts,
so
you
multiply
say
0.9
times
0.9
after
these
two
cycles,
you
point
eight
efficient,
so
that
figure
holds
20
percent.
A
I
mean
this
is
for
real
matters,
but
you
gotta
start
by
understanding
this,
because
then
you're
actually
motivated
to
do
it
like
I'm
motivated
to
do
it
because
there's
basic
physics,
there
that
say:
yes,
you've,
gotten
efficiency
of
transmission,
the
basic
law
of
conservation
of
energy,
you're,
gonna
increase
that
force.
So
let's
continue
on
that.
A
When
you
talk
about
so
we're
talking
about
some
design
considerations,
gear
down
numbers
multiply,
its
multiplicative
abrasion
on
metal
on
metal
is
hard,
so,
for
example,
with
hydraulics
were
effective
there
because
we
got
an
oil
bath
for
hydraulics
all
the
time,
but
gears
on
gears
I
mean
gears
are
a
very
sensitive
part
of
your
mechanical
system.
They
wear
out
in
the
3d
printer
you've
got
rubber
on
metal,
so
you've
got
rubber
belts
and
and
metal
sprockets.
That's
an
efficient
way
to
go
at
some
some
level.
A
You
can
think
about
3d,
printing,
larger
belts
and
using
metal.
Sprockets
I
mean
that
won't
wear
out
that
that
will
last
for
a
bit
of
time,
motor
mounting.
How
do
you
mount
motors?
We
talked
about,
starting
with
set
screws
for
little
things,
moving
on
to
key
ways
and
clamps
for
larger
things.
If
you
want
to
take
a
look
at
just
to
specify
a
little
more
about.
A
This
is,
for
example,
a
design
document
back
on
that
bulldozer
and
thinking
first
about
the
clamps.
But
this
is
what
it
is,
and
this
is
how
you
make
it
you
get.
You've
got
your
clam
shells
with
bolts,
you
weld
them
on,
but
what
about
going
even
more
like
there's?
No
reason
why,
in
this
case,
we
cannot
go
to
a
keyway
and
the
clamp,
so
a
keyway
clamp.
So
you,
in
addition
to
your
clamping,
you
want
a
key
way.
A
The
the
disadvantage
of
keyways
is
that
that
they're
tight
in
order
to
be
effective,
they're
a
tight
fit
so
so,
in
other
words,
if
you
put
one
of
these
in,
it's
like
you're
gonna,
be
putting
in
some
elbow
grease
to
take
them
out.
So
a
clamping
mechanism
allows
you
to
remove
a
keyway
very
easily
a
key
out
of
a
key
way,
and
we
actually
see
that,
like
I've
seen
tractors
that
the
wheels
that
they
interchange
on
tractors,
they
have
a
not
only
a
key
way
but
a
clamp
system.
A
Someone
like
this
so
that
once
again,
going
back
to
the
power
of
the
clamps
in
systems.
Design
I
mentioned
the
very
basics
of
it,
with
the
engine
or
motor
that
you
have
make
everything
else
fit
to
that.
So
you
can
transfer
the
force
without
breaking
your
belts
or
grinding
your
gears.
The
teeth
off
your
gears
or
breaking
your
chains
on
change
ride
the
rule
of
thumb
for
the
GBCs
for
every
50
horsepower,
use
structures
that
are
1/2
inch
steel
that
works.
We
use
happen
to
drive
sprockets
on
them.
On
our
tracked
machines.
A
A
Let's
talk
about
gears,
the
physical
gears
that
mesh
to
each
other
and
why
we
like
gears
now
I'm
I'm,
not
super
into
gears
until
3d
printing,
because
the
3d
printing,
you
can
get
complex,
teardrop
geometries
printed,
just
like
that.
So
what
kind
of
gears
are
there
just
for
the
terminology,
so
you've
got
spur
gears
which
are
simple,
cylindrical
gears
with
shaft
that
are
parallel
and
coplanar
and
teeth
that
are
straight
and
oriented
parallel
to
the
shaft
they're
simplest,
most
common
type
of
gear,
easy
to
manufacture,
use
for
a
wide
range
of
applications.
A
A
So
this
is
less
noise,
especially
medium
to
high
speeds,
and
also
multiple
teeth
are
meshing
at
the
same
time,
because
they're
not
straight.
In
other
words,
you
can
get
more
strength
out
of
this
same
amount
of
material.
When
you
use
helical
gears,
they
can
move
on
to
herringbone
gears,
which
are
essentially
double
helical
gears
which
have
the
nice
property
of
being
self
aligning
along.
The
axis
this
will
not
push
out
because
the
teeth
are
meshed
in
such
a
way
that
they
prevent
motion
along
the
axis.
A
There's
other
types
of
gears
like
worm
gears
like
this
once
again,
tough
to
machine,
but
if
you're
3d
print
those
you
can
have
an
easy
worm
gear,
so
these
are
gears.
But
what
about
the
tooth
profiles
themselves?
The
most
common
one
is
the
involute
gear
right.
There
has
a
property
of
being
the
most
it's
the
most
commonly
used
system
for
gearing
today,
there's
also
cycloid
gearing.
If
you
take
a
look
at
that,
what
is
cycloid
google
cycloid
gear,
they
look
a
little
different.
A
A
Let's
get
into
other
types
of
gears
like
planetary
and
split
ring
planetary
gears,
so
this
is
the
great
example
of
the
planetary
gear
and
a
stepper
motor
which
has
the
advantage
of
having
a
very
tight
form
factor,
and
these
are
also
stackable.
So
if
you
have
now
this
gear
down
upon
that,
you
can
add
another
pancake
of
that
and
get
further
gear
down
like
that.
So
it's
very
tight
and
compact
for
large
transmission.
A
Now,
of
course,
if
you'd
stack
the
next
one
on,
if
you
have
the
features
as
large
as
small
as
this
you'd
wear
them
out,
because
now
you're
pushing
that
with
much
more
force.
So
what
you
do
want
to
do,
if
you
still
want
to
retain
this
kind
of
form
factor,
you
can't
still
keep
it
small,
but
you
have
to
make
it
taller
make
all
the
the
gears
taller
like.
If
this
is
three
fold
gear
down,
your
next
gear
should
be
three
times
as
large
to
handle
three
times
as
much
force.
A
So
now
comes
to
the
magical,
split
ring,
planetary
gear
and
I
suggest.
You
look
at
just
study
this,
how
it
works
in
detail
it's
too
hard
to
explain,
but
is
essentially
that
one
gear,
one
half
of
the
gear
or
either
one
half
of
the
gear
or
one
half
of
the
the
outer
gear
has
a
different
number
of
teeth
by
like
1
or
2
or
3
teeth,
and
the
way
it
works.
This
right
here
with
that
one
center
ring
ring
gear
and
these
3
years
with
different
number
of
teeth
on
them.
528
gear
reduction.
A
E
E
E
F
E
A
A
Well,
that's
fun,
I
mean
he's
going
right
now
he's
going
down
right
now,
but
it's
very,
very
slow,
but
she's
still
got
that
tiny,
cordless
drill,
so
Aiden.
That
kind
of
someone
explains
the
rock
crusher,
because
right
now
you've
got
a
cordless
drill
that
can
lift
the
person.
So
we're
talking
about
150
pounds
right
there
and
he'd
take
a
couple
more
stages
to
that
and
there
you
go
so
the
same
guy.
F
A
D
A
A
Got
a
pile
of
crushed
rock,
that's
gravel,
like
I,
think
our
gravel
at
the
entrance
to
the
road
there.
It
needs
a
little
work
there.
We
could
fix
that
right.
There
and
I
don't
have
to
lift
a
finger
outside
of
carrying
just
throwing
in
some
rocks
into
the
crusher
and
then
taking
the
bucket
on
the
tractor
and
spreading
it
over
there.
So
practically
this
not.
A
B
A
The
question
boils
down
to
what
appropriate
scale
is,
if
you're
and
somewhere
in
northern
Canada,
where
you
cannot
get
gravel.
But
you
got
plenty
of
gravel
underneath
rock
underneath
you
that
may
make
sense,
but
elsewhere
it
may
make
no
sense.
So
it
depends
where
you
are
a
question
of
skill
and
access
to
resources.
The
point
of
that
is
that
it's
possible
to
do
that.
If
you
want
to
do
that,
a
use
case
may
be
marginal,
but
it
will
certainly
help
that
guy
in
northern
Canada,
who
cannot
do
otherwise
so.
E
A
You
may
can
say
you're
running
a
solar,
compute
operation
and
you're
producing
250
pounds.
I
mean
the
point:
is
that
you're
gonna
be
able
to
execute
that
build
at
$1
a
pound
for
the
machine-like
super
low
cost,
so
it
may
cost.
You
say
a
thousand
bucks
to
build
that
rock
crusher
thousand
pound
machine.
That's
made
us
he's
got.
Ultimately,
it's
gonna
have
some
heavy
metal
gears
that
are
probably
hardened
cutting
blades,
which
is
probably
you're,
seeing
some
torch
tables
out
of
even
mild,
steel,
that's
hardened
or
whatever.
A
E
A
Mean
for
us
here
we
wanted
to
do
solar,
concrete
we're,
not
gonna,
buy
a
50
thousand
rock
crush
we're
gonna,
build
it
and
we're
probably
gonna
build
it
for
a
thousand
dollars
for
this
this
machine,
and
then
we
can
show
that
that
can
potentially
do
I'd
say
we
have
a
production,
run
a
build
of
a
house.
We
spend
the
day
making
concrete
to
get
like
250
pounds
of
cement.
You
can
go
through
the
numbers,
but
that
probably
does
make
economic
sense.
So,
okay,
so
now
you're
on
to
designing
your
own
gear
downs.
A
A
C
C
A
Many
teeth
what
size
it's
right
in
freak
out
freak
out
also
has
involute
well,
this
is
generated
with
what
I
just
showed
you.
This
is
a
simulation,
so
you
can
simulate
things
in
freak
as
well,
so
here's
a
planetary
gear,
a
center
driven
gear
and
and
with
a
gear
down
ratio
of
about
four
or
so
so.
This
is
one
example.
This
is
right
from
free
cab.
Go
through
that
tutorial.
A
Now
you
can
also
do.
Did
you
know
that
in
the
free
cab
you
can
go
to
scripting?
You
can
actually
tell
the
commands
right
there.
So
here
is
a
little
tutorial
of
how
you
generate
this
through
the
command
line.
So
you
start
I
mean
in
freecad.
You
have
basically
like
a
text
box,
the
console
where
you
type
in
commands-
and
here
basically
it
goes-
tells
you
how
to
do
that
through
lines
of
code,
and
so,
like
you
know,
involute,
even
whatever
I
mean
it's,
it's
kind
of
complicated.
It's.
How
do
you
describe
this
language?
A
B
A
E
A
Gives
heavy-lifting
to
its
minions
according
to
William
years,
so
he
can
script
that
and
the
end
product.
There
is
you're
designing
these
these
things
all
in
the
command
line,
and
you
see
it
live
appearing
on
your
screen.
Well,
that's
pretty
powerful
and
cool,
so
you
can
go
through
this
tutorial
if
you
want
to
learn
how
to
do
that,
if
you're
a
coder
in
openscad,
you've
got
plenty
of
stuff
and
we
mentioned
openscad,
so
you've
got
a
gear,
generator
parametric
gears
of
all
kinds
of
size,
sizes
and
shapes.
A
So
here's
one
for
parametric
herring,
bone
spur
gears,
rack
and
pinions
ring
gears,
like
all
kinds
of
you
name
it
it's
it's
they're
also
openscad.
Naturally,
a
planetary
gear
generator
right
here,
so
you
can
yeah.
You
can
click
on
these
links,
planetary,
gear,
generator,
pollock,
for
example.
This
guy
walks
you
through
how
to
design
this.
This.
D
A
A
F
A
F
C
A
F
C
B
A
B
A
F
B
A
B
A
So
we
do
it,
we
could
do
everything
we
can
start
with
the
simple
3d
printed
stepper
motor
right.
We
can
do
the
gear
down
and
that's
pretty
powerful
I
mean
that's
like
from
scratch,
you,
starting
with
magnets
you're,
starting
with
plastic
and
you're,
starting
with
copper
wire,
and
you
can
do
it
all,
including
if
you
make
the
bearings
themselves,
if
you've
got
your
printers
like
a
very
small
nozzle,
very
fine
prints,
you're,
printing,
the
gears,
sorry,
the
bearings,
which
are
simply
planetary
gears
that
are
free
spinning.
A
A
Yeah
wheels
and
possibly
like
when
you're
making
those
the
gears
that
you're
making.
If
you
make
them
out
of
rubber
as
opposed
to
plastic,
then
they
may
really
much
more
resistant
to
wear
because
plastic.
If
it's
hard,
it's
gonna
braid,
but
if
it's
flexible,
potentially
you're
doing
something.
That's
okay,.
B
C
F
F
F
D
E
C
A
F
A
A
A
C
A
A
Your
your
police
have
the
right
board
a
match
to
the
shaft.
The
number
of
teeth
is
appropriate
for
the
kind
of
kind
of
speed
or
or
gear
down
that
you
want.
You
want
to
pay
attention
to
the
pitch.
What's
to
the
pitch
of
gt2
belts
to
millimeters,
that's
the
gt2,
meaning
the
distance
between
the
two
teeth.
You.
F
C
A
A
A
Even
thinking
about,
if
the
wires
hot
will
embed
right
into
the
plastic,
so
you
can
design
a
system,
that's
got
reinforced
steel
belted
radial
tires.
How
about
that
design
that
hardened
steel,
yeah,
okay,
hardened
steel
is
desirable,
or
things
like
the
attractions.
Otherwise,
your
your
tracks
will
wear
out
pretty
quickly
already
make
it
a
sauce.
A
Protecting
in
the
metal-
and
then
you
gonna
be
printing
the
rubber
rubber.
So
you
can
reuse
that
one
of
the
bath
is
good
idea
like
with
hydraulics.
We
have
abrasion
reduction
by
crosby
located
inside
oil
baths
like
eating
in
hydraulic
systems,
the
motors
and
pumps
they're
in
a
lot
of
baths,
but
it
will
no
oil
is
the
working
fluid
cess,
longevity
and
hydraulics
is
higher
than
just
playing
uber
gate,
sometimes
o.