►
From YouTube: Thunderhead Filament Extruder - Working Meeting 2
Description
See notes at http://opensourceecology.org/wiki/Thunderhead_Filament_Extruder
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B
A
A
So
yeah
just
to
wrap
up
that
story
there
was
I
was
like
okay.
Well,
why?
Why
go
through
the
effort
of
the
Thunderhead
when,
when
this
small,
smaller
Phyllis
trigger,
like
machine,
can
do
it
also?
The
other
thing
is
that
the
throughput
is
very
slow
appears
to
be,
as
matt
said
here.
8
hours
to
put
out
a
kilogram
and
Matt's
best
results
so
far
have
been
one
to
two
kilograms
per
hour.
So
that's.
If
you
talked
about
that
in
24
hours,
you
know
that's
24
kilograms.
A
B
Regard
to
the
full
sphere,
extruders
like
that,
so
the
post
that
you
linked
to
was
actually
yeah,
so
they
are
extruders
are
quite
a
bit
faster.
Now,
even
depending
on
what
version
of
the
filter
you
I
think
some
of
the
newer
ones.
Maybe
all
of
the
neurons
come
with
a
screw.
That's
actually
designed
for
plastic.
B
B
A
A
B
B
C
B
B
A
B
B
Investigating
different
suppliers
of
screws-
and
you
know
it
may
come-
may
require
changing
our
barrel
to
fit.
Well.
If
you
use
that
size
barrel,
we
don't
we'd
have
to
make
it
special.
But
if
you
change
your
barrel,
size
I,
don't
know
14,
millimeters
or
whatever.
Then
all
of
a
sudden,
we
have
a
rack
of
up.
We
can
just.
A
B
A
B
B
A
B
A
B
Would
be
outputting,
then,
let's
say
the
flow
in
the
machine
kind
of
reduces
a
little
bit.
Maybe
for
that
you
know
what
we're
talking
about
like
stick
and
slip.
You
know,
maybe
the
the
for
some
reason,
the
the
filament
that
the
plastic
isn't
flowing
through
as
quickly
then
there's
some
buffering.
The
plastic
will
actually
build
up
in
the
barrel,
which
will
increase
the
pressure
and
help
to
restore
the
flow.
B
Whereas
if
it's
that
capacity
there's,
you
know,
you
can't
say,
fill
the
barrel
a
little
more
or
if
it's
over
extruding,
you
know
as
the
barrels
over
extruding
compared
to
normal,
the
amount
of
plastic
in
the
barrel
would
actually
reduce.
And
if
the
plastic
in
the
barrel
reduces
the
pressure
at
the
end
of
the
screw
would
also
go
down,
which
would
tend
to
reduce
the
flow
that
works
with
star
feeding.
B
So
so,
basically,
it's
just
kind
of
a
control
measure
to
to
them
now.
The
other
reason
why
it
was
on
there
because
we're
extruding
flake
instead
of
pellets
and
so
Paul
its
flow
flakes
tend
to
Ridge
Jam.
So
if
you
just
put
a
hopper
on
top
of
the
throat,
sometimes
what
will
happen?
Is
you
get
this
little
bridge
in
there
and.
B
Paper
off,
then,
maybe
every
once
in
a
while
bridge
will
collapse
and
then
you've
got
a
flood
of
plastic,
and
so
that
can
also
you
know,
cause
some
variation.
If
you,
if
you
think
about
that
kind
of
you
know
like
like
flour
flowing
through
shoots,
sometimes
no,
it
doesn't
just
float
evenly.
It
kind
of
goes
down.
B
A
Okay
and
let's
see
I
was
gonna,
show
you
the
motor.
Have
you
looked
at
the
motor?
That's
that
they
use
within
the
diamond
filament
extruder,
because
as
far
as
strength
I
mean
it's
not
a
it's,
not
a
stepper,
but
it's
it's
just
a
regular
motor.
But
how?
How
much
control
do
you
need
to
to
have
over
the
motor
speed?
Because
this
one,
the
experience
with
us
from
the
alignment
film
an
extruder-
was
that
it
was
pretty
manageable
I.
You
just
said
the
speed
using
a
controller.
A
A
C
B
A
C
B
B
B
A
B
A
B
B
A
B
B
A
A
B
A
B
B
B
C
A
B
A
B
B
B
A
B
Yeah
I
would
like
to
so
again.
You
know
now
the
non-contact
diameter
sensors.
Finally
working
is:
do
a
series
of
tests.
Okay,
let's
extrude
everything
the
same
and
you
know
flood
feed
versus
star
feed
and
just
see
you
know:
can
we
achieve
more,
even
throughput
with
the
star
feeder
and
we
can
with
flood
feeding
and
then,
if
the
answer
is
yes,
we
keep
the
star
feeder
if
the
answer's
no
Chuck
that
thing,
because
it's
a
it's
a
you
know
quite
a
large
extra
lump
of
complexity.
Yes,.
A
B
A
B
A
B
A
C
A
B
B
C
A
B
B
B
A
B
Mean
it's
that
thing
soaked
up
a
ridiculous
amount
of
time,
because
so
I
tried
all
these
methods.
You
know
we
were
having
problems
with
bridging
and
jamming
and
so
on
and
so
I.
You
know
all
sorts
of
and
I
write
about
stars
feeding
and
oh,
that
would
be
great,
but
trying
to
create
a
mechanical
thing
that
flakes
ended
at
a
constant
rate.
B
You
know
say
if
you're
going
to
use
it
well
screw
actually
has
quite
varied
flow.
It's
the
other
problem
with
the
screw
is
that
you
end
up
with
flakes
jamming
between
the
screw
and
the
barrel.
If
you're
trying
to
use
like
this
little
teeny
thing,
just
something
like
a
dog
food,
so
the
automatic
dog
food
thing
where
there's
a
screw
that
just
kind
of
pushes
out
that
many
food
pellets,
but
because
the
flakes
are
so
in
uniform.
B
We're
getting
the
right
amount,
because
you
know
at
first
I,
you
know
I
had
I've
tried
different
things.
I
saw.
One
thing
is,
you
could
use
like
a
rotating
cone
kind
of
looks
like
a
cement
mixer
but
a
longer
cone
and,
as
you
rotate,
that
the
flakes
move
down
the
cone
and
then
fall
out
in
the
rate
at
which
you
rotate.
It
changes
the
rate
at
which
the
flakes
come
on.
B
B
B
It's
pretty
good
your
spring
steel,
but
anyhow,
so
there's
a
bottom
angle
and
it's
got
an
eccentric
weight
on
it.
So
when
the
motor
runs,
the
angle
vibrates
back
and
forth
up
that
back
and
forth
also
has
a
little
bit
of
vertical
component
into
it,
and
so
it
cleans
the
flakes
up
and
towards
the
end
of
the
conveyor
with
each
rotation.
B
C
B
There
is
to
take
this,
so
one
of
the
things
we
just
used
was
that
would
end
up
with
this
huge
gusher
of
plastic
into
the
bucket
fill
the
bucket
really
quickly.
If
you
turn
down
the
amount
of
vibration
to
get
a
slow
flow,
it
was
just
too
hard
to
get
the
the
right
amount
of
flow,
but
with
that
change
in
angle,
kind
of
like
a
river
of
a
rifle.
B
B
B
B
So
yeah
trust
me
I
was
most
to
be
eliminate.
The
spare
feeder
I
think
the
so
again
the
star
feeder
is
on
there.
Historically,
we
had
very
low
quality
like
if
we
continue
using
the
high
quality
flake
that
we're
producing
a
chopper,
then
I
think
we
may
be
able
to
do
away
with
star
fever.
Mm-Hmm
it
flows
like
pellets
practically.
You
know
it's.
It's
very
regular.
A
A
B
A
B
A
A
B
B
We
we
had
some
some
of
the
some
of
the
flake
that
they
made
for
us
in
hands
in
the
end
where
we
had
them,
basically
take
what
they
ground
and
run
it
through
the
grinder
again
to
get
final
material
and
it
had
enough
fines.
You
know
that
we
were
not
able
to
successfully
extrude
it
and
we
had
to
get
out
some
screens
and
screen
everything
before
we
ran
it
through
the
extruder
yeah.
A
A
B
B
A
B
A
B
A
B
From
one
to
five,
so
heating
zone,
one
and
two
or
on
the
main
barrel
on
that
D,
a
piece
of
DM
tubing
and
then
brass
tube.
The
event
has
two
heating
zones,
and
then
the
nozzle
has
its
own
and
one
of
the
reasons
for
the
heating
zones.
There
is
because,
after
you've
extruded
your
first
time,
you've
got
solid
plastic
in
there
that
you've
got
to
melt
and
then,
secondly,
if
it's
unheated,
the
temperature
goes
down
so
far
that
the
plastic
freezes
before
it
gets
out
of
the
experiences.
A
B
B
B
B
C
B
A
B
Is
quite
yeah,
I
mean
our
first
extruder.
We
were
using
a
drill
for
the
motor
and
I
mean
it
was
just
direct
drive,
no
gearing
one
heating
zone.
It
was
a
piece
of
plumbing
pipe
with
a
end
cap
and
a
hole
drilled
in
it.
You
could
make
the
whole
thing
for
like
a
hundred
one
hundred
bucks
or
120
bucks,
yeah
I,
don't.
A
B
B
You
know
the
body
was
made
out
of
two
by
fours
and
stuff
I
mean
it
was
super
cheap
and
then
to
get
really
good
diameter.
You
can
just
drill
a
hole
in
a
piece
of
metal
and
chamfer,
the
back
of
it
and
you
just
pull
the
foam
through
and
just
shave
off
everything
excessive
I've
gotta,
get
it
right
down
to
the
nice
pieces.
A
B
A
B
A
B
A
B
My
thought
on
that
is
because
it's
wrapped
right
on
to
a
piece
of
steel
that
and
it's
carrying
mains
current
and
then
overseas.
It's
carrying
220
that
is
best
to
use
professionally
made.
One
just
to
avoid
you
know,
will
reduce
the
risk
of
catastrophe.
Although
the
machine
is
grounded-
and
you
know,
I
typically
have
them
set
up
with
a
ground
fault.
A
A
A
We
use
the
micro
power
key
with
micro
power
cube,
but
you
can
get
a
pretty
low
cost
micro
power
cube.
If,
if
you're
thinking
of
like,
if
you're
integrating
that
system
with
a
grinder,
it
would
make
sense
to
have
like
a
hydraulic
power
source
where
you're
grinding
and
then
you've
got
a
hydraulic
power.
Now
you're
actually
doing
the
hydraulic
motor
for
$73.
You
know.
A
B
A
B
A
A
A
B
You
know
for
me
the
stepper,
a
nice
thing
about
it
is
I,
have
to
deal
with
back
control
and
tuning
it.
The
system
I
can
pretty
much
just
pick
one
that's
strong
enough
and
tell
it
how
fast
to
go,
and
it
goes
stepper
motors
are
people.
The
3d
print
understand,
stepper
motors,
so
hooking
them
up
should
be.
A
A
B
A
B
There's
a
little
gap
feet.
It's
basically
open
on
the
bottom,
where
the,
where
the,
where
the
cooling
tube
comes
out,
it
kind
of
kind
of
pokes
out
the
bottom
uh-huh,
and
so
basically,
as
the
as
the
molten
plastic
is
coming
out
of
machine.
There
are
fumes
that
come
off
the
plastic
there
and
so
that
so
those
get
drawn
up
into
the
fume
hood
and
then
also
at
the
feet
throat
where
the
star
feeder
dumps
plastic
and
solar
fuels.
That
typically
would
come
out
of
that
zone.
Yeah.
B
B
B
A
B
B
B
Don't
know,
maybe
maybe
there
are
six
inches
of
sag
or
saw
by
today.
It's
a
fairly
direct
line
to
that
last
wheel.
There,
and
in
fact
you
know
the
the
filament
is
stiff
at
that
point,
so
some
of
that
sag
could
actually
be
the
stiffness
of
pushing
down,
as
it
goes
around
a
title's
trying
to
resist,
maybe
pulling
that
sagging
itself.
C
B
B
B
C
B
B
B
B
A
B
A
B
A
B
B
You
know
down
fast
enough
so
that
it
doesn't
crystal
on.
So
if
it,
for
example,
if
it
doesn't
spend
enough
time
in
cool
little
water,
it'll,
it'll,
look
and
mortis
and
clear
I've
had
film
it
where
you
extrude
it
and
then
the
next
day,
when
you
go
to
yes
and
when
you
feed
it.
Actually,
we
we
had
this.
We
dried
of
some
Fullman
and
in
Nairobi
at
too
high
of
temperature.
A
B
B
C
A
B
Issues
with
the
microscope,
so
I
got
a
I.
You
know:
I'm
gonna
be
spending
a
significant
portion
of
my
time
in
the
next
couple
of
weeks,
helping
them
get
that
stuff
sorted
out
and
then,
although
I
don't
think
it'll
take
someone,
it
might
only
be
about
a
week
then
after
that
I'm
pretty
much
100%
dedicated
to
documentation
of
this
and
then
rebuilding
my
own
equipment.
Here,
you're.
B
B
B
B
B
B
What's
what
else
the
the
vibratory
conveyor
and
the
where
the
hopper
is
held
on,
there's
a
better
design
that
I've
done
on
that,
where
the
design
files
are,
but
anyhow
I'll
redo
that
I'm
not
sure
if
I
spend
much
time
changing
the
control
box,
because
with
the
bigger
stepper
motor,
the
big
stepper
driver
doesn't
fit
in
very
well
along
with
a
big
12
power
supply.
So
you
know
but
I'm
a
again,
seeing
as
how
the
motor
will
likely
change
in
the
future.
B
B
A
A
B
B
A
Mid-February
you
should
be
up
and
running
again:
oh
yeah,
okay,
so
yeah!
No!
That's!
That's
really
good!
So
at
that
point,
if
we
think
about
a
potential
schedule
of
actually
doing
a
workshop
on
this,
build
which
I
mean
I,
think
that
the
thing
that
people
would
really
like
about
this
is
just
the
depth
of
all
the
learnings.
On
all
that
I
mean
from
your
experience.
I
mean
that's
I,
think
that's
really
valuable.
I
think
we
can
get
people
to
show
up.
When
do
you
think
would
be
a
time
to
do
that.
B
A
B
Like
you
know,
kind
of
like
that,
I
was
saying
in
the
last
call
like
you
know,
there
are
so
good.
You
know,
as
you
can
tell
from
all
the
detail,
we
like
it
hasn't
been
a
cakewalk
yeah
and
you
know
if
we
can
crack
a
few
of
those
issues
before
before
setting
it
up
with
you
guys.
It's
just
that
many
fewer
headaches
yeah.
A
B
B
B
B
B
A
B
B
B
B
B
A
B
B
A
B
A
Mean
one
thing
that
I'd
like
to
see:
if
we
can
put
it
also
on
hero
X,
so
I'm,
platinum,
I'm,
gonna,
get
up
the
open-source
microfactory
challenge.
I'm
gonna
put
that
online,
which
is
primarily
about
3d
printing
filament
maker,
but
making
it
like
the
design
would
focus
around
a
cordless
drill
or
cordless
power
tool,
Construction
Set
and
in
it
the
film
and
maker
I
think
could
go
in
there
or
we
could
do
us
a
separate
one
for
the
filament
maker.
But
I
was
thinking
for
the
open
source.
A
Microfactory
challenge
the
filament
maker
would
be
we
can
put
up.
You
know
possibly
there's
ways
to
leverage
that
for
some
design
contributions,
I'm,
not
sure
what
exactly
would
we
could
put
up
there
because
not
a
lot.
This
would
be
like
specialist
territory,
like
only
the
extruder
people
would
know
about
this.
So
it's
not
really
highly
popular.
So
that's
you
know,
that's
you
know
we're
not
really
I
guess
when
you
talk
about
crowd
contributions,
you
have
to
give
people
something.
A
That's
you
know,
so
many
people
can
try
out
like
that's
why
the
cordless
drill
would
be
like
a
super
modular,
scalable,
cordless
drill
and
really
super
flexible.
That's
something
that
everyone
with
a
3d
printer
could
tackle,
but
for
this
the
filament
maker,
it's
a
little
tougher,
because
if
he
gets
into
all
this
technical
know-how.
B
A
The
way
that
this
could
work
we
could
do
like
so
the
majority
of
the
problem
could
could
be
around
the
main
core
work
around
the
cordless
drill,
but
there
could
be
a
section
of
that
like
for
that
much
smaller
audience.
That
does
have
the
technical
expertise.
We
can
just
pretty
much
hear
our
critical
issues.
Certain
design
points
that
we
want
and
throw
that
out
to
the
crowd.
I
think
that
could
definitely
be
a
way
we
can
approach
it,
whereas
we're
not
really
relying
on
that.
A
You
know,
but
we
can
be
surprised
and
the
way
it
works
is
like.
If
nobody
solves
those
problems,
we
don't
give
out
the
money.
You
know
we
don't
give
out
the
incentive
prize,
the
idea
with
hero
axes.
We
would
crowd
fund
the
the
prize
itself,
so
that
would
be
part
of
the
work,
but
I
think
it's
definitely
worth
trying
and
I'll.
Think
about
that
more
on.
You
know,
as
I
continue
on
this
I'll
keep
you
in
the
loop
on
that.
B
B
A
B
A
A
lot
about
these
topics,
but
he's
the
guy
that
created
the
XPrize
and
he
also
some
of
the
spin-offs-
is
the
hero
X
platform,
which
is
crowd,
funded
crowd,
design
challenge
is
essentially
incentive
prizes,
but
I
think
that
it's
got
a
lot
of
potential
and
I.
Don't
think
it's
utilized
enough,
so
I
think
we'll
be
good
experimenting
with
this
and
can't
hack,
because
it
will
form
us
to
communicate,
and
you
know,
get
more
supporters
anyway.
B
B
B
B
B
A
C
B
B
B
B
B
But
at
the
same
time,
it's
the
only
way
that
we've
been
you
know
like
another
possibility
would
be
able
to
have,
you
know,
would
be
to
say,
have
an
even
longer
barrel
or
we
could.
You
know,
have
the
temperature
of
the
barrel
go
up
and
melt
the
plastic
and
then
go
back
down
to
get
the
viscosity
and
then
have.
B
B
B
A
B
B
A
B
B
B
B
A
B
A
A
A
B
B
B
B
A
A
B
B
B
B
B
A
A
B
B
B
B
B
A
B
Yeah
those
are
so
those
jobs
like
working
on
that
box.
I
will,
you
know,
I
think
what
we
were
thinking
about
doing
is
splitting
my
time
kind
of
50/50
between
documentation
and
you
know
other
things
on
the
other
things
we're
going
to
be:
rebuilding
the
extruder
and
working
on
the
box
and
so
on,
just
kind
of
whatever.