a problem I have experienced with a
number of these low-cost spools of heel
a in one or more places along the spool
the line will be crossed over and when
your extruder is trying to pull on that
it can't because it's got like a half
hitch here and if the spool has this in
one place I have found that we'll have
it in multiple places throughout the
length of the filament and that's the
problem if you're experiencing this on a
spool of filament then you cannot go off
and leave your 3d printer unattended a
lot of the prints that I do can go on
for 10 20 hours or longer and there's
just no way that you can stay there and
watch over the thing all the time I drew
these hubs in fusion 360 comes right off
the printer like this
and these are designed for these spools
and this is what I call no-name filament
that's out of sought of China I have to
admit I don't buy the most expensive
fillable whether that's proven to be
good enough for what I do and these go
in here and that screws on when the
drive belt is turning that it's
tightening that I'm using quarter inch
bamboo for the axles that just goes in
there I put a little bit of paraffin on
that so it doesn't squeak the STL files
for these will be on Thingiverse under
my name if you're using the same
filament then this will work for you
otherwise this is basically to give you
an idea of how to draw or design your
own and a couple of these pulleys that
I'm using on my motor will be on there
as well
you have a carriage bolt up through the
bottom the weight of the motor keeps
this end down these sides support the
motor side to side I've made my own belt
this is actually a rewind belt from the
senior 20 organ you can use an o-ring
I've put a little bit of tension in that
belt just snug it up and that's that's
good enough when I'm away from this I'll
put a clamp on here just puts a little
weight on the spool and keeps us from
unwinding by itself then I use a foot
switch it's an on/off Deadman type
switch
I just put a little pressure on this
spool to keep a little tension in the
filament let's move it back and forth on
the on the take-up spool
another reason for easing the footswitch
if you encounter a line over here this
we can begin to bind up and you'll have
to stop it and then work that that place
where the filament is crossed over so it
comes free then you can start again
don't be letters
looks like I might put a guard over this
fan that is kind of sure
the fan is required to keep this motor
cool it just blows a little air over
this primary coil this gets extremely
hot and with this air blowing across
there
it never does get too hot to touch
so that's all done and you want to run
the end of that retain it keep that from
unraveling for a while after it sits on
the spool it'll start to get a memory
about Alex wound up on there why rewind
so slow well in part I'm using a motor
that I have a lot of these shaded pull
motors do not have a lot of power this
one does this turns 18 rpm
I cannot stall this by hand and I can
always increase the size of this pulley
a little bit but basically the filament
is quite brittle you don't really know
for sure when you're going to encounter
one of those line overs on the spool and
I don't want a jerk on the filament and
take a chance of maybe snapping it into
and you can buy a gear motor on eBay
made in China they have all different
combinations and speeds you can run it
on a 12 volt battery or on a power
supply if you've had a problem with
filament where the filament is crossed
over on the spool you may find this very
handy and I'm just giving you
information about what I have done you
can design or build your own version I
have this ring in my scrap bin this will
still slide back and forth and it keeps
my hand from getting down into the fan
and when I get a chance I'll enclose
this which will make the air flow over
this primary coil more efficiently
you
