Top 22 Best 3d Printer For Ar Lower of June 2023

Parker Emory Harwood

 

I'm in the beginning stages of planning out a 3D printer design and build, and wanted to get some inputs from this group. Keep in mind, I'm in the very early stages so a lot some of the components are just there for representation, not what they actually will be.

My specific question is: how much weight can a good coreXY belt system handle for the moving components?

It will have two print heads moving independently on the Y axis, but mounted on a single gantry. The gantry will have linear rails on opposite sides so the prin heads can move past each other freely. Each print head will have a servo switching extruder set up. I designed the servo switching extruder as a mod for my CR10, so it will need a lot of design changes, but same basic function.

I want to have direct drive extrusion for all 4. But concerned about total weight. Maybe 1 direct drive for when I really need it, and 3 bowden tube.

So there will be a grand total of 4 hot ends, two servos, 4 pancake steppers, 4 3:1 drive ratio extruders.

Am I insane and there is no way a coreXY belt system can handle this weight and have a fast print speed?

Billy James
Am I a caveman because I'm drafting a 60mm x 80mm x60mm with leftover printed extrusions 😂

Parker Emory Harwood
Billy James hahaha hey, building a printer is building a printer. Gets you to level 10 per that other recent post lol. I wanna see pics of it on here when it's completed!

Billy James
Parker Emory Harwood as for the direct drive question, it will certainly lower your maximum lateral jerk and acceleration. So far I've only found direct drive to be useful for printing TPU since it's much softer.

Billy James
Parker Emory Harwood this little one is just to get my feet wet, and will run off salvaged Ender hardware and software. My next one I want to be a belt printer but made with the same electronic hardware and software that someone making a voron would use.

Parker Emory Harwood
Billy James I find I get much cleaner prints with direct drive when I am making something with text and the main visible surface of the design touches the build plate. Here is the main thing I make that I am building this for

Ben Krupa
Maybe a 2040 for the X?

Parker Emory Harwood
Ben Krupa currently planning on 20x40 for all pieces, it just looks like 2020 because the linear rail on top is covering it up.
I'm not too worried about stiffness, mostly just the weight and trying to get print speeds up to 150-200mm/s

Михеев Игорь Александрович
You need 10mm or 15mm Gates / Contitech GT2 / GT3 belts. And Nema 23 motors if connected directly.

Parker Emory Harwood
Михеев Игорь Александрович thanks for the advice. I was planning on Nema 17, but I'll up that a bit and look at torque specs with some calculations for the acceleration I'm targeting

Михеев Игорь Александрович
Parker Emory Harwood Nema 17 can also be used if the available drivers do not hold the required current. But then you have to put a reduction gear (as an example, see the Voron 2 project).

Joshua Varner
shrug, best way to find out is prototype and sample! How I do most of my learning 😉

James Carpino
Probably good topic for this group,
https://www.facebook.com/groups/cncbuilddesign/

Parker Emory Harwood
James Carpino I didn't now this existed. Just sent a join request.

Parker Emory Harwood
James Carpino been 4 days.... who knows if they will ever accept my request lol

James Carpino
Parker Emory Harwood idunno maybe it's the holiday season distracting people. I don't remember, did it have questions to answer?

James Carpino
I think CoreXY is a bit difficult for IDEX. Or IDEX is difficult for CoreXY... is that something you're really sure about? I would just make it cartesian. I built a cartisian with about 350x350 travel, and I didn't really have any problem with spee… Xem thêm

Parker Emory Harwood
James Carpino thanks for the heads up. My plan is to use the independent dual extruders for duplication where the two heads are moving in sync printing the same item side by side on the y-axis. That makes is easier, but it's still going to be complex. I agree I might ditch the corexy idea and go with really beefy x axis steppers to just handle the weight.
Thanks for the heads up on vibration. I have the whole frame as 2040 extrusion. I am anticipating needing to add dampers on some diagonals, but will test it out first and see where needed.
I would love to see the clip of yours.

Jake Murphy
If both print heads make exact opposing movements wouldn’t they counter act each other

Parker Emory Harwood
Jake Murphy I'm still learning about corexy, so I don't know 100%, but I think if they moved the same x steps at the same time they would cancel out to zero y movement. I have seen IDEX with Corexy, but I need to do more research for sure.

Jake Murphy
Parker Emory Harwood yeah my brain doesnt want to handle all that thinking honestly, I was just thinking in terms of vibration

James Carpino
Parker Emory Harwood wait, which do you call X / Y? On mine, the X axis is the motion along the gantry, and the Y axis is the motion *of* the gantry.

Parker Emory Harwood
James Carpino along the gantry is y, motion of the gantry is x. I'm making it 900 wide (x) and 600 deep (y. I wanted the gantry to span the shorter distance.