I don't like getting my head in here man...
Hey guys! It's time for our monthly update on our aliens power loader build!
In this episode we're gonna be making the power loaders grippers or as I like
to call them, the jaws of life! As always make sure you're following us on
Instagram to see real-time updates on the build the videos are released on
YouTube once per month let's get started! Bogdan: So I managed to do majority of the
design while I was in class and that includes the palm for the gripper the
hydraulics that are going to be moving it up and down as well as the large hydraulic
motor that's gonna spin this gear and allow us to put different attachments
onto the gripper, but now that I'm back in the shop let's design the fingers!
Alright so as you can see I just finished up mounting the hydraulics and
the linear guide rail and what that allows us to do is that when these
hydraulics open and close our gripper we can move. So next we have to figure out
how we're gonna manufacture these grippers because right now it's a solid
block of Steel which will be very difficult and very heavy to manufacture
instead we're gonna figure out how we can plasma cut this and then weld it together!
So to actually do the perimeter plates what we're going to do is we're going to
select the face that's going to be joining all of them which is gonna be
the side plate and then we're just going to offset the entities and that's going
to take the whole perimeter of this and we're going to set that to a quarter of an inch
into the inside and that will give us a quarter of an inch to weld around when
we get to joining these. So we can do that and then we can select that whole
chain and repeat the exact same thing so that we can get the thickness of our
perimeter, now we're going to separate the whole thing out into individual
slots and join the piece.
So now that we have that we can extrude it out to the other piece, so let's make that
visible and we go over here select our perimeter plates and extrude that out!
There we go, so now we've got plates that cover the entire outside, however while
they do cover the whole piece they would be very difficult to join because it
would be very hard to hold them in the perfect place to make sure that the
whole thing is parallel straight and even and there's no gaps anyway so what
we're gonna do is we're gonna add tabs all the way around like a jigsaw puzzle
and then what we can do is we could just slot them into each other, clamp it and
weld it all across so let's get to it!
So now that we have our whole perimeter covered in the tabs what we can do is we
can go into extruded cut, select our sketch and select all our contours so that's
going to include the inside and the outside and that's gonna be the same for
every one of these tabs. So what we're doing here is we're creating a gap of
about half a millimeter around each slot to allow us to have some clearance for the
fit because the plasma cutter, while it's very accurate it's not perfect it does
have some little bit of slag and there is a curve on the actual cut so to
compensate for that we are over sizing the holes just a little bit so that when
we weld them they'll still be able to fill in perfectly and we don't have to
worry about trying to fit them in with like a hammer they should just tab right in!
Alright so now what we want to do is we want to get that exact same thing on
the other side, we're gonna take all of those features and mirror them across.
I am not supposed to be beatboxing whoops...!
Okay, there! So now I just have to
fix some of the assembly... All right so now that's exported let's go cut it!
This video has been sponsored by you guys! Huge thank you to all of our patreon
supporters over the years and our new YouTube members when you support the
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early and help choose what projects we work on and we post our CAD files for
most projects, but the power loader project as you can imagine is not a
cheap project so to try and help fund the build I've designed a new t-shirt
that I think you guys are really really going to like it's a fun twist on the
classic Darwin evolution diagram except instead of becoming a modern homo sapien
they graduate engineering college design and build on Elysium style exoskeleton
and then build a P 5000 power loader! Oh and did you guys know I formed
Hacksmith Industries as a company back in 2013 this is a limited edition shirt
sale on bonfire so grab yours before they're gone for good!
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Bogdan: Parts are set... Machine is homed! Whenever you're ready!
James: Hit the button!
James: Is it done? Bogdan: It's done!
James: That's a lot of pieces...! Bogdan: Yeah well now we got to deburr the whole thing,
grind it all off and then we can start welding!
James: Well have fun!
All right, let's start putting together the first finger. We've got all the side
plates in now I'm gonna get this top plate on!
So now the whole thing is
clamped and we're gonna tack weld it around the perimeter to hold the whole
thing together and once we test fit it with the rest of the arm we'll be able
to weld all across and make it nice and strong. So now that it's all tacked up
we're gonna wait for it to cool pull off all the clamps and start the other finger!
So! We got the fingers made alright just need the thing that holds it together...
The palm!
Bogdan: Let's put together the palm! James: All right so we got it all held together with clamps now, which means
we can tack weld it! Good to know we can crush a person completely...!
Bogdan: Look at this thing.
that's a bearing... James: And it goes right there! Bogdan: It goes right here!
James: What's it rated for? Bogdan: Like 11,000 pounds James: You could put like a transport truck on this
and spin it around like a lazy susan... Or attach our gripper to it!
James: It's literally as big as the entire arm... Everything is moving! Oh god! It pulled me!
All right, let's put the other one in.
Ooooh my god...!
We got a carjack, we got a log and then we got Mjolnir on there holding up the arm so
we can see if the bearings spin, so let's bring it in.
Bring her down! That's a nice baring... don't try to do a loopty loop! Bogdan!!!
Bogdan: Got it! Haha!
Bogdan: Well it's down now!
Bogdan: All right, so let's cut a slot.
James: In a tube!
James: Oh it's peeling up look at that!
James: All right, moment of truth, will it slide?
Will it bind up when it's got like 20,000 pounds of force yanking on it?
James: It seems to roll nicer...
Well we might as well keep going!
Okay while Bogdan's doing some of the finishing touches on the weldment
we can start looking at the hydraulics. This is something called a flow divider
and it ensures the same amount of hydraulic fluid going in one end comes
out the other end that's really important when you have two hydraulic
cylinders working in parallel because if you just connected them with a tee like
this the flow would go to whichever cylinder has less load. So we have this
like this we need that to go in the bottom and over here, two feet isn't even
long enough. Okay so this is the arm, these are the grippers, now we have to
size all the hydraulic lines coming out of it. One line and the other line...
Now the confusing part let's just draw them on this side so we can...
*Listing all components in a messy way*
Now we just need to figure out what
these hoses are. So from here to here, I'm gonna buy five and six foot.
Sho-pping-list...
All right, so we got our shopping list me and Riley we're going to princess auto, buy
some stuff come back, Bogdan will have it mounted.
Riley: Wait what did we even come here for...?
James: this one looks smaller... Two three foots!
Riley: Perfect! James: This is what we want... A swively boy, but we can take a tee adapter lock
the top of the tee and wammo blammo we got the same thing. But the size we need.
Check!
Shopping list completed!
James: It's time to attach the two foot hoses: that one and that one!
Riley: It's tight for sure but maybe it could be a bit tighter I don't know...
James: Look at this mess of hoses!
So the buttons work as long as we power it up and assuming Bogdan didn't design
this wrong... Riley: We will have a working power loader? James: I hope so!
All right, ready for the big test! Here we go!
Nothing is moving... The 3 of us: Whoa! James: You didn't tight one of them enough...
One is closing! And now the other one- Why are they backwards?!
Riley: Is it leaking a lot? James: Nah just a little bit!
Past Riley: It's tight for sure but maybe it could be a bit tighter I don't know...
James: Power! Riley: Lifter!
James: It's opening it's opening! Closing! It's closing!
James: Okay we did it, ready?
James: You guys ready for this? Super, epic... Crushing!
Riley: Hydraulic press?
*The 3 of us laughing*
James: Looks like a duck!
Riley: What do we crush now?
James: One hand, in the eyes! Yes!
Here we go! Riley: Indiana Jones! Oh boy...!
James: All right what else can we crush?
James: That looks so disturbing from the phone...
James: YEAH!!!
FEEL THE POWER!
YEAH!
Yes...!
James: All right, so you might notice when we started crushing things the fingers kind
of went like this, show some b-roll of that. You can see it here, that's
because there's a bit of slop in the system but we actually need that slop
because the way we've actually designed this linear guide to save cost is we
have bearings that actually ride in a track and what happens is the bearing
actually engages on one side and the other side allowing it to spin
vice versa when it switches this is actually the same way a garage door...
So as you can see there's these bearings mounted for the garage door and right
now they're riding on the inside of the track but as you go up they'll actually
ride on the outside track. So to get rid of some of that slop we can either try
and reduce the width that these bearings have to move, we'll need to leave
enough so it can actually adjust otherwise it's not gonna slide. Or we
could add a second guide rail right here, the reason we didn't just use nice big
honkin linear guide rails is because they're really expensive! A guide rail
that would be rated for what we're trying to do in this space would
probably be a few thousand dollars just for the chunk of Steel which is crazy
and we can't afford that... So we made this! Or Bogdan made this, but now we need
to make it better!
So as you may have noticed during our initial testing of the
gripper you saw a little bit of flex in the actual fingers now we anticipated
that but there was a lot more than we were hoping for what ended up happening
is during the welding of the railing to the side plate the actual rail warped a
little bit giving us a little more space in the middle which causes that huge
deflection that you see in the grippers so what we've done to mitigate that is we've
actually added tie rods on either end of the gripper so theoretically with this
new design the bearings move very little and that means that the
gripper will not have the same amount of flex. So what we'll actually end up doing in
the second hand is leaving a bit of material in the middle so instead of
having one big slot there'll be two smaller ones and that will make sure
that the steel can not flex or warp in the middle!
*Chokes*
Owen: Good start...
James: We're good, let's start...
*Continues choking*
James: That's pretty good. The mouth straighter too... We've got the tensioner in the middle.
We might even just include this in the video...
All right, this is so awesome! In the
next video we'll be fine-tuning the gripper, get it all painted and then do a
serious destruction video where we show off just how powerful these grippers are
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