Rusty Huxley
Description
thingiverse.com/thing:4148
It uses the PLA Bushings like
thingiverse.com/thing:4434
I modified the scad script to use 6mm rods.
(basically just put in 6mm for rod size and 12mm for width)
I have also redesigned the X and Y motor brackets to be able to use nema 14 or 17 motors. The Z now takes 2 nema 14 motors.
I designed it around 1/4" threaded rods and #6-32 bolts. It should work with 6mm rods and M6 bolts, but I'm not sure.
This should work with the same extruder as the regular Huxley. I believe.
The image is of the current build status, it needs the Y Stage and some belts on it before it will go, and an extruder. But the Z movement is working well so far.
Edit: Got the belts in and installed on the X Axis
Test Videos here
youtube.com/watch?v=rji863B-JnA
youtube.com/watch?v=pw6CKZPRubw
The design files are in SolidWorks
Edit 12-8-10: Found a problem with the X-axis parts.
the bolts used to tighten the rods in place had a nut bigger than the rod, so I put in a slot on the side. This weakened the structure to the point where tightening the bolts enough to keep tension on the belt, it would break the piece. I redesigned them after finding "Undersized Hex Nuts" (McMaster carr part 90760A007 for 6-32) which allow me to insert them the same as prusajr originally had. I also added more material to the sides to help with this. I am currently printing them out for testing.
Edit 12-9-10: I added more material to the x-axis parts to make them a bit stiffer again, I didnt get a chance to test the last version, so it may work just fine.
Instructions
Found out somebody did a nice writeup for the fullsize one, which should be pretty similar to this one.
reprap.org/wiki/Prusa_Mendel#Assembly
BOM: This does not include and of the extruder parts
Printed Parts:
bar-clamp x8
belt-clamp x4
board-clamp x4
vertex x6
x-axis-carriage x1
x-axis-idler x1
x-axis-motor x1
y-bushing-holder x4
y-motor x1
z-top-motor x2
Motors:
X motor : Nema 14 or 17 x1
Y motor : Nema 14 or 17 x1
Z motors : Nema 14 x2
Enough bolts to attach the motors(M3 on mine)
Bolts:
#6-32 1/2" bolts x22
#6-32 nuts x22
1/4-20 nuts x A Bunch
1/4" washers x A Bunch
1/4" Fender Washers x 6
Bearings:
1/4" bearing x3
(I dont know the part number right now but they are 0.625" OD, which is like 16mm if your building in metric)
Edit: Current Bar sizes are as follows
Triangle frame threaded rod = 10" x6
Bottom across frame threaded rod = 8" x4
Top across frame threaded rod = 12" x2
Z bottom support threaded rod = 12" x1
Z Threaded movement rod = 8" x2
Z smooth rod = 9" x2
X & Y smooth rod = 11" x4
These are just because I got the smooth rod out of some old printers, and scaled the rest around them. All these dimensions should be able to be scaled up pretty easily. I should be able to get about a 6"x6"x4" printable area.
*Kind of important*
I attached the Z drive rods with some pieces of aluminum rod that I drilled through at 5mm and tapped halfway with 1/4-20. And then put a set screw in the side to hold it to the motor shaft. Im trying to make a printable version of this and still have it be as straight.
Here are instructions on how to put together the Z spring loaded antibacklash nut contraption
youtube.com/watch?v=k1xQw5gCoGE
You will need a nut that is drilled out just bigger than your rod, like this one
i.imgur.com/vUNVM.jpg
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Hello Rusty!
As i just finished printing your huxley design a few days ago, i really wanted to thank you , without your work , i would not really have been able to print a reprap on my VERY slow repstrap! So very very big thanks ! I have not wired the electronics , but all 3 axis work great!
Not sure if your latest revision to the X axis addresses this issue (talking about V2.2), but the nut traps were a little to wide for my 1/4"-20 nuts and they would not stay trapped when the rod would turn.
Possibly make the walls around the nut trapping a little bit thicker to compensate for all the extra space?
Rusty,
You don't happen to have spare hardware lying around do you? (especially the springs?) If I paid for them do you mind shipping them my way?
For the bushings, I had assumed the linked ones were the right size, but after printing and testing, I found out otherwise. Do you mind posting the bushings stl you are using?
Is that MakerBot motors on your Z-axis? Where did you get your motors for the Y an X axis? Trying to keep things similar to yours for testing/feedback purposes.
What's your extruder setup looking like or have you not gotten to that yet?
Cool, you beat me to it! been working on the same thing for a couple of days, (also in solidworks, so I'll compare notes). How long did it take you to print this out?
Haha, i just noticed it was your XZ axis that I saw.
It looks pretty good.
I like the idea of having the bushings bolt on/
Yea, I saw a couple people post similar designs when i was still working on this one too.
But, I would love to see what you came up with also.
I think im going to make a version that uses the linear ball bearings also
http://www.thingiverse.com/thi...
as that seems pretty cool.
It didnt take very long to print at all, but honestly, after i start a print I usually just wander off to another project or a movie or something and come back later to find it sitting there waiting for me :)
I have been thinking of building another Huxley. I just might hoave to give this version a try. Nice work.
Gonna be able to print this in 2 sheets with my UP! printer.AWESOME!
Couple questions:
1) How many Y-bushing holders do we need?
2) Do you think ABS bushings would work as well? And how many of those do we need?
3) Do you mind listing the rod lengths? BOM?
4) What electronics/software are you running?
Also, I updated the Y-bushing stl, it needed to be taller.
And Ill put up a BOM here shortly.
1) You will need 4 Y-bushing holders. I will put a pic of them up shortly.
2) ABS might work, but I dont think it would be nearly as smooth as PLA. You will need 12 total, but i would print out a bunch of extras, as i have broken a few just messing with it too roughly. so I have a pile of them.
3) I put up the rod lengths I used, but they are not really set.
4) Im using some custom stuff ran with emc2 right now, but i want to get either a gen6 all in one board, or a RAMPS Pololu board, so that i can just mount it on there.
Anyone know where I can get a professionally made RAMPS board? I dont really want to have to etch my own. Even if its just a bare pcb, i could populate it. :)
Ohh man that's awesome
Printing this right now... BTW you should have posted as a derivative from the Prusajr's posting
Im glad you like it. Thanks
Let me know how yours turns out, Im sure you can figure out how to put it together with the instructions I gave.
And I thought about making it a derivative, and then thought Its kind of a combination of both, and then forgot about it completely when I was uploading it :)
It's not really a derivative. It's inspired by Prusjr's.
Isn't everything thing in life technically a derivative of the first caveman's rock hammer. Do we need to acknowledge that? :-D
License
More from RustySpoon1121
Nice thing. I was thinking of building a really simple printer too (I own a Mendel but for future expansion perhaps a Prusa or a Rusty can be an option). The only thing I don't really like are the bushings. Ok, they are printable, but linear bearings are really cheap and will last like forever... If you would like to consider linear bearings, perhaps you want to have a look at LM8UU type bearings - they are available on ebay in 10pcs-packs for less than 20$ shipped... :)
Just a thought... O:-)