kevinakasam / beltdrivenender3 Goto Github PK

Would be nice to be able to exchange information on this project. GitHub has a nice message board that can be made available in the discussion tab.

Hey there, thanks for this awesome mod.

I did run through parts list to make mine, I stumbled on a part which I couldn't find. On the parts list it says 188mm belt and on the bottom it says 188T. I couldn't find the source code of the website to create MR.

Thanks and have a nice day.

Parts list I'm looking: https://kevinakasam.com/snvb623-2/

Excellent work on this project. I did notice a thing or two while building it.
For the heat set insert version, would it be possible to add a short M5 insert where the M5 tensioner ring bolt goes into the motor mount? This way when loosening the belt you don't go to far and that M5 nut fall out. Might also be able to add a spring between the mount and the transmission body or the transmission body and the tensioner ring, to maintain tension while loosening or tightening, thus allowing the motor mount to move accordingly without having to get fingers in there and push or pull the motor mount itself. That gets difficult with the printer inside an enclosure.

Maybe my Ender 3 is an odd one, but the original Z shaft is too short and the pulley hangs off the end of the shaft, resulting in artifacts. In addition, #72 and #51 both point to complexity in the current design. I think it would be simple to redesign the motor mount to use a twist-to-tension design, simplifying the print and eliminating the need for a separate motor carriage and M5 bolt entirely. I used this in my own printer for the Z axis. I think this would solve the issue with short shafts, bolts, nuts, and remove one more piece of hardware.

Only one screw is anchored. The other 3 move in a path along arcs centered on the anchored screw.

It's not easy to tell, but the Voron Zero has a belted design that uses this: https://www.teamfdm.com/files/file/319-v01-belted-z-drive/

Kevin, would you consider doing a new design for belt driven ender using linear rods for X and z Like this one:
https://www.reddit.com/r/3Dprinting/comments/p7ewyc/i_was_really_tired_of_ender_wheels_getting/

It seems that the holes for the wheels is about 1mm to close to eachother, 0.5mm on both sides of the belt.
At least compared to the CR-10 second Z-stepper plate you can buy of Aliexpress

I'm on version 3.5 and am planning to switch back to v3.6 UltraLow.
Can you update the file Transmission_UL_V3.6 for the left side? because if using the right file, the stepper motor cable will have to be much longer? thank you very much

I was wondering if I can change the default velocity of 5 and acceleration of 100 to something faster now that I have this mod?

Printed everything in ASA on my voron v0.1 which is calibrated very good and had to print 1_ZDriveTensioningRing(Voron).stl with 98% size in X&Y to have a good fit with the thread of 1_MotorMountTensionerArm(Voron).stl

at 100% it just slides over

I just printed the LeftV3.3 stl file and the teeth for the belt are all squished and not uniform. After comparing V3.3 to the previous versions, I see that all the older versions have a proper 2GT belt tooth, but 3.3 has a square 1mm tooth with 1mm spacing.

Is it possible to improve top right and left? The place where the belt is tightened always tears me. If the walls were thicker, the problem would be solved.

Hi Kevin / Sam

I had some trouble inserting the M3 nuts into the block and pushing them all the way down, probably due to ASA shrinkage. So I've moved the holes to the bottom where the nuts don't have to be pushed down through the entire part. I thought you might want to consider doing the same for your original design as it makes it much easier to insert the nuts.
On the left side it's not really an issue because the nuts don't have to be pushed in as deeply as on the right side.

I've attached STL and STEP files here for reference: RightV3.3 (MGN) bottom nuts.zip (sorry GitHub does not support directly attaching STEP files and STLs)

I don't have Fusion 360 so I just patched up the STEP file with lots of booleans but here's the Onshape link:
https://cad.onshape.com/documents/530c50c0feb35506422f7b54/w/d6230fb67fb3cda85e9c2f90/e/e698622b87cb5f67726b5bd5?renderMode=0&uiState=6236882708209f1af7b77858

So please correct me if I'm wrong, but I'm trying to find in the documentation how I could have known that the parts I printed were not compatible.
From this Git I took the latest version, and printed the transmission body with bearing and rotated version. Then according to BOM I printed the left/right top A/B, but they don't align with the rotated transmission body for the rod. Looking at the STL files they do align with the unrotated version though. The only bearing holders that seem to align with the rotated transmission body are the TransmissionBody_Left.stl and TransmissionBody_Right.stl in the root directory. This seems like there's a line missing in docs/BOM maybe?

LeftTop and RightTop parts both AB and not seem to be missing the top holes for the frame in v3 folder.

The motor tensioner part is flipped the wrong way for optimal printing orientation, the voron guys have tapered the four motor mount holes so those should face down.
https://github.com/kevinakasam/BeltDrivenEnder3/blob/main/V3/Voronparts/1_MotorMountTensionerArm(Voron).stl

Is that possible to use MGN-12H instead of HGH15CC or HGH15CA

the current PSU support only really works for an Ender 3 pro, and would need an adaptation to properly mount onto an Ender 3 Max

Hello, Perfect Mod
But what is the Prober Rotation Distance after upgrading to this mod since we are changing from normal T8 Leadscrew

2_Bottom_toothed20T.stl
2_Bottom_F623.stl

I bought the recommended motion kit on Aliexpress. I got the one with 20T idlers, but the printed part seems too small for them. Is the correct file posted? It seems like the F623 and the 20T file are identical. (V3)

Hello,

After I did this to my creality printers, I realized this is too good to not have in my other printers, which are geeetech a20 (M)
I found an STL with a complete A20M in thingiverse, but, scale seems off, I'll try to figure it out tomorrow, but, I don't have enough knowledge to fix the Z plates to match the A20 plates, as far as I know, it's the only thing that needs fixing, apart from probably have to drill 4 holes to screw the Z belt idlers in the bottom of the printer.

Is it something of a possibility this, or any chance of a fusion file with history so I can try and replicate the work for the A20 Z plate dimensions ?

Thank you for this excellent work

I printed the STLs for the Ultra Low transmissions (left and right) and to my surprise, the holes for the T-nuts/bolts do not extend all the way through the model. I finished with a drill so it was not a issue but others may not have this ability. Thanks!

Lord Kevinakasam,

Your designs are flawless, they print perfectly fine, they work great. I can't express how glad I am to have found your mod for the ender series printers.

I'm working on modifying my printer to accommodate for several extruders, moreover, I'm working with your MGN v3 design to use dual linear rails on the Z axis. Currently your cad model uses the v-slot wheels and there are no signs of the spacers you created for the linear rail variant of the mod, if it isn't too much to ask, would it be possible for you to post the CAD models to the other variants, more specifically one that has the spacers that replace the v-slot wheels?

Just to give you a little sneak peak here is a view of what I'm working on, to give you a little hint it involves the Octopus Board, 5 extruders, and a custom ultra silent fan shroud which uses noctua fans. Btw the motors up top are extruders and not the x steppers. Of course I was unable to change the model to reflect on your mod, not just yet, I was kinda hoping to get the spacers first (the step file from you) then I'd go in there and change things up

This is pretty messy at the moment because I have not been able to take care of the wires but as soon as I have the extruders mounted where I need them then I'll do cable management.

Thank you for your all your hard work, your mod really helped me.

Hi Kevin / Sam. I tried to upgrade to the V3.5 plates but I ran into an issue.

The distance from the top of the nut to the bottom of the belt clamp (see image below) is different for the left and right plate. The left distance is 19.405mm and on the right it's 20.629mm (blue dotted line in the image below).

This means that the required belt lengths are not the same for the left and right belts and therefore it's not possible to achieve equal belt tension on both sides without measuring the actual tension.

I took the same measurements from an older CAD (I don't know which version or how old) and there both distances are equal.

The method I use to achieve equal tension is to cut both belts to the same length and then tighten the tensioner screws with an equal number of turns. But for that the belt paths on both sides must be exactly the same.

The measurements below were taken from BeltDriven_Ender3_V3_25012022.step and I've also been able to measure the difference in the actual prints.

BTW, thanks for this awesome mod! I've used it for a long time after getting super frustrated with dual Z lead screws.

I cant seem to locate the dual z folder referenced in the read me
is this correct or am i just going blind

Dual Z G34
For a dual Z setup with two z motors use the files from the "Dual Z" folder instead of the transmission and top parts from the V3 folder. The rest is still the same, works with V-Wheels and MGN-Rails.

Hello,

The .stl files for the entire transmission (both regular and rotated) seem to be missing from both Thingiverse and GitHub. I was able to export the bodies I need from the Fusion360 CAD file, but they seem to be older models and don't reflect the bearing change you made in your changelog.

The stepper drivers on the Ender 3 V2 are in standalone mode, and their current cannot be adjusted via klipper/firmware. It might be wise to just put a quick note in the Dual Z readme page that the given macro won't work for people with a stock Ender 3 V2 board (Creality 4.2.2 or 4.2.7 boards)

Hello,

thank you for the great modification. I could complete it yesterday and made three little observations:

1. the 1_RightBottom part (https://github.com/kevinakasam/BeltDrivenEnder3/blob/main/V3/1_RightBottom.stl) is on my Ender-3 too close to the gantry so the belt starts to rub on the 2040 profile. I fixed it for now by using two washers but 1mm - 1.5mm more clearance would be the best. So a simple increase of the strength ob the baseplate should solve this problem.
   

2. the pulleys on the top let my belt moving left and right an the clearance where the belt should move freely is pretty tight. You can see it in the picture.
   

3. the rod could be 4-5mm longer being in total 335mm. I let cut my rod before I assembled the mod and saw that the rod disappears in the 608ZZ bearings on the right and the left.

But all in all it's a really nice mod and I already did my first testprint and all went fine!

Thanks!

An issue I have encountered is that the new "neo" update to ender series uses different extrusions with 1 side flat.
It is still fine in my opinion since support is held with 2 screws and motor mount with 3 if you rotate extrusion 180 degrees.

Looks like the 8mm rod gets moved down for ultralowheight. Is there a different belt length mentioned somewhere?

I had some issues with the new belt tensioner bolt design - the change from inserting it on the bottom to sliding it into a gap (I used V3.6). My nuts didn't fit, either they are slightly larger than standard or my print came out a little small - this is likely as my calibration tests did show inner diameters to be about 1-2% undersized, but they're incredibly difficult to get into to modify after printing, and after you resort to trying to push them in with heat and ruin one, a pain to try and reprint when your printer is in parts! The previous design was a bit fiddly to get the nut set in position but more reliable imo

These either need a lot more clearance to allow you to easily insert of a range of different nut sources or a rethink on the design, I realise with the current design it does need to be tight enough to hold the nut as you tension the belt too.

I know not everyone will have them available and may be too much hassle to maintain a design fork but a version of the parts with heatserts would be fantastic - they are great for 3D printed parts.

Is it compatible with ender3 v2?? Seems like it's all the same.. But I'm not 100% sure?

Hello
I can't download the V3.step files.
I would like to check and mabye adjust the Z plates.

Are there any plans to add frame braces support on this version ?:)

Similar to this https://www.thingiverse.com/thing:3746653
I think this is the perfect Z axys combination for ender printers
My stock ender 3 printer had ~4mm deviation on top without the frame braces installed

I have been running this belt system over 6 months. I am now upgrading to linear rails but found one of the part does not fit correctly because my rails seem to have a slightly thicker car on them. I tried to modify the STL file for the left adapter but Fusion cannot generate an STL from the original STL. I import and try to export it back and get an error.

I downloaded the CAD files but this does not include any of the linear rail adapters for the Z axis. Can you please share these files?