on today's makers mashup we are doing day 2 of our 3d printer build ok so we're on day 2 of our 3d
printer build and I want to introduce Danny here he is my nephew and the one that we're building
this printer for I didn't have him on the first day's video because we had a video malfunction
but I wanted to introduce him so when you see him in the videos he's the one that's gonna
be working on this 3d printer he's actually doing all the work all I'm doing is giving him a lot of
instruction and of course shooting the video for you guys alright so today we're gonna be working
on our motion system for the 3d printer here and primarily we're gonna be focusing on the y-axis
we're gonna be using these dryland bearings to attach to the printer bed so the printer bed will
slide across these here one of our viewers did have a question about the bed weight it looks like
that is about 835 grams so comparing that to other beds it's within about 200 grams of any other bed
style that I've been able to at least research on the Internet those plates on the bottom actually
weigh about 200 to 300 grams so I think we'll be ok with stopping this much mass of course if
we don't stop that mass effectively we'll end up with ringing and we won't know until we put this
together this is the first time that I've used this sort of bed on movable y-axis it has worked
great for the core XY printer and using that core XY to just drop the bed but of course less motion
involved so we will see how that works out in the end the nice thing about this printer and
what we're doing with it is that Danny is able to upgrade this and as he upgrades it if he decides
that he wants to go with a full aluminum or steel plate for the bottom carriage you can always
change it upgrade it but we're going to put it together with the extrusion and see how that works
out for us today all right so we've got everything all ready here we're to go ahead and get started
so stick with us here and we're gonna go through some of the Assembly of the y-axis all right so
let's get to work build day two is gonna focus on the y-axis we're gonna start off by reviewing the
parts that we need and then we're going to add the linear guides to the bed frame these are gonna be
the pieces that actually assemble to the bed frame for the rails to go through next we're going to
assemble the rails to the frame and install the bed so we'll have a complete motion system ready
to go then we're gonna assemble and install the tensioner and that'll keep our belt connected and
then we're gonna also assemble it and install the stepper once we're done the belt will go on and we
will have a complete y-axis let's talk about the parts we're gonna need for today we're gonna need
four dryland bearings you can use traditional bearings as well we're gonna need for extrusion
bearing blocks these are 3d printed we're gonna also need two linear rails those are gonna be
four hundred and forty millimeters long then we're gonna need four rail mount brackets those are 3d
printed we're gonna need one tensioner assembly we're also gonna need one idler bearing and
screws to assemble that then we're gonna need one NEMA 17 stepper a 3d printed stepper bracket and
some screws to go along with that and then we're gonna need one gt2 timing belt and timing pulley
and links for that are in the description now I completely understand that if you're building
your first 3d printer following this you're not going to be able to 3d print your own pieces for
this so what I'm going to offer at the end of this series is links available where you can buy the
3d printed parts directly or if you want to buy this entire printer as a kit and follow along I'll
offer that as well and that will be at the end of the series so the first thing you're going to want
to do is 3d print these bearing blocks and then you're gonna want to push in the dryland bearing
you can see Danny's already done that and now he's taking an m5 nut n screw and simply going ahead
and getting these ready to put on to the bed now you're gonna want to drop these right into the bed
frame and then you're gonna want to tighten them up they should be pointing the opposite direction
I had to actually reprint these but we didn't want to reshoot the video so there's a slight
difference here but it all you're gonna do is put these on and then tighten them up here we
have the finished bed with the bearings pointing the wrong direction but again when you print this
out yourself you'll see they just simply go the other direction and a little bit easier to attach
once you have all four installed we're gonna move on to the next step which is getting the linear
rails on you can see here Danny is measuring no what we did was we measured the center points
of the bed where the rails fit through so Center to Center to the center of where these brackets
go right to the 24 T extrusion this doesn't have to be 100% precise because you'll need to tighten
this up once the rails are in place but you want to get a pretty good spot to where they're very
close to the permanent location and you're gonna want to do this on all four sides once the blocks
are in place all you need to do is slide the rods into each one of the blocks now this rod is
a little bit short the description does have the proper 440 millimeter length for these rods once
you get all the rods installed then just give it a little bit of push and make sure that it's sliding
freely against the rails and there's Danny giving it a good thumbs-up our next job here is going to
be to install the stepper motor we're gonna need a few different screws for this and we're gonna
need the stepper and you're also going to need the timing gear from the belt all of these are
linked in the description so you're gonna want to mark the center of the extrusion of where you're
going to install the stepper motor bracket and you're going to only use the two bottom screws of
the bracket when you - the extrusion once you have that complete you're going to want to just install
all four screws of the stepper motor to connect it to the bracket on the shaft of the stepper motor
you'll find a flat spot you're going to want to match that up to one of the grub screws on the
gear and just screw that in the flat spot helps the gear from turning while it's in use yeah once
you get this one in just do the same for the other one tighten that up and your stepper motor is all
installed now we move on to the tensioner you can see we've already got the idler pulley installed
this just takes a couple of washers and not in a bolt and that attaches to the 3d printed part and
links to everything are in the description now you're going to want to mount this opposite of
the stepper and between the two linear rails this goes on pretty simply you just tighten it down and
then one note on this is that you may have to move this left or right once you get the belt on there
you want the belt to be completely straight but it does take a little bit of adjustment after it's in
place to make sure that you're 100% straight the final part of the idler is to just install an m3
screw and then you're gonna use this m3 screw to control the tightness and tension the belt
once you have the belt in place the final step is to install the belt what you're going to use is a
small little bonding plate here and that's linked in the description and then you just use a couple
of these same tea nuts that we've used everywhere else and once you've looped that belt all the way
through you zip tie it and attach it with this bonding plate then once that's complete your
next step is just going to be to trim off the excess of the belt and you'll have one complete
Y access ready for action so that completes day 2 as you can see here we now have the proper 440
millimeter length rods in place and the other part that we have here are the linear bearings
that look correct so we're all set here with our y-axis so thanks again for watching this
video if you liked it make sure you mash that like button and don't forget to subscribe so
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enjoy the work that we're doing here thanks again for watching and we'll see you guys next time