today we're gonna install two fans and a hot end now I need to review some stuff
with you so I can tell you which connections we need to use first we have
our fan connection which is d9 then we have an extruder connection which is d7
then we have another extruder connection which is d10 and then this is normally
used for a heat bed and this would be d8 but in this case we're gonna use it for
a fan then over here we have our first thermistor connector this is used to
tell temperature this is for the hot end being the first one the second one here
is used for your heat bed and the third one is used for a second extruder so to
connect this I'm going to show you as best I can
we're gonna start with the first fan so we're just gonna plug it in now the
second fan we have to do on d8 which is used for the heat bed so negative
terminal is this one so let you see that for a second it's right here then the
one closest to me would be the voltage so that's connected now as well now we
need to connect the actual hot end leads and we're gonna do this in d10 which is
over here the top is actually negative the bottom is positive but in this case
the order doesn't matter so we're just gonna place that in there and tighten it
down then we're gonna do the same the one just below it so now these are both
connected so you have your positive near negative but the order doesn't matter
and the same goes for the thermistor so this is going to be hot and one
so we're gonna connect this one here in this one here it doesn't matter which
order you plug them in in a moment I'll show you how to load the firmware after
I show you how to connect the USB okay now we want to connect the actual USB so
we can program so what we need to do is connect the USB serial cable so the
begin goes over here the small line goes into the computer and you'll hear a beep
in a moment I'll show you how to load the firmware ok we want to open up the
Marlin folder for 1.1.8 then open up the Marlin sub folder and what I want to do
different here is open up, "boards.h", and in, "boards.h", I want to show you
something here so this is the RAMPS 1.4 configuration for each of the possible
configurations that you can use for your output ports and in this case we want to
do extruder fan fan so we want to copy this entry right here this is the exact
architecture is the MKS Gen L so don't worry about that so let's close this out
let's open up, "Marlin.ino", it's gonna be, "configuration.h", tab do a
search on motherboard and as you can see the current motherboard that is listed
here is, " BOARD_RAMPS_14_EFB", so
you want to highlight that and paste in what you copied from the, "boards.h"
file for extruder fan fan and all we're gonna do is check to make sure that we
have the port configured so we're going to go over to tools
we're gonna go down and see if our COM port is selected which it is and then
our motherboard is gonna be the same architecture as the MEGA for the Arduino
no so we're good there so all we have to do is compile and
upload and in a moment I'll show you how to test it
okay before we can test it we have to plug back in the power that goes to the
board which I actually wired up earlier I'll do a separate video on this in the
future and then we also have to reconnect the USB now keep in mind once
this is energized you don't want to touch it
same goes for when the power is in it so you have to be very careful of what
you're working with okay now it's energized open up Pronterface
I'm gonna connect to the printer board and to test it first thing we can do is
we can say we want to set the heater so I'm gonna click set and right now it's
set to a default of 75 degrees because I don't want it to get too hot so you're
probably gonna hear a whirl when the power supply has this set okay the next
thing we want to do is we want to try and start one of the fans so to start
the fans we're gonna say, "M106 p0 S..." being the first fan and the speed will say is
120
so that's the first fan now if you want to start the second fan all you have to
do is say p1 and then hit enter so to turn them off all you have to do is say
M107 p0
and then the other one to turn off the second one will be M107
p1
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