Cura and ender 3 v1 | 3DMeltdown 3D Printing | Page 1

obtuse crane Mar 21, 2023, 1:30 AM

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Hello,

I have a ender 3 printer. I have been having trouble with my printer.

Here is what I have and done...

-Bed Leveler with the latest firmware
-Glass Bed
-New Z Motor
-New Extruder Motor
-New Filament
-Blue Pipe Capricon
-New 0.4 Nozzle
-Latest Versions of Cura

The bed is perfectly leveled. I had no trouble printing the bed test. With the bed test I was able to make sure it is perfectly leveled. I have used the paper method but with a receipt. I can print the first few layers perfectly. But after a while the flow have decreased making stringy affects.

https://www.thingiverse.com/thing:5775331/comments

Everything is perfectly fine with my printer. Is it possible to the model? Or is it Cura that is doing this?

I used to be able to print models just fine until now. When it messes up, I have to put it at the flow rate of 120. Or 220? I don't remember I had to add 20 to it is what I know. I do not know how long this will help.

This is what I am trying to print.

New Wingspan Egg and Food Holder by SciTeacherEd

I enjoyed using Xavier Derrey's Wingspan Egg and Food Box (https://www.thingiverse.com/thing:3614941), but with the expansions we were running out of room, so I modified the design. I added two additional slots for nectar (as a couple others have also done), made the egg older 1 cm narrower front to back, and used my honeycomb customizer (https:...

brisk rain Mar 21, 2023, 3:58 AM

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Attach your gcode

obtuse crane Mar 21, 2023, 5:29 AM

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; Ender 3 Custom Start G-code
G92 E0 ; Reset Extruder
G28 ; Home all axes
G29 ABL
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X0.1 Y20 Z0.3 F5000.0 ; Move to start position
G1 X0.1 Y200.0 Z0.3 F1500.0 E15 ; Draw the first line
G1 X0.4 Y200.0 Z0.3 F5000.0 ; Move to side a little
G1 X0.4 Y20 Z0.3 F1500.0 E30 ; Draw the second line
G92 E0 ; Reset Extruder
G1 Z2.0 F3000 ; Move Z Axis up little to prevent scratching of Heat Bed
G1 X5 Y20 Z0.3 F5000.0 ; Move over to prevent blob squish (edited)
NEW
G91 ;Relative positioning
G1 E-2 F2700 ;Retract a bit
G1 E-2 Z0.2 F2400 ;Retract and raise Z
G1 X5 Y5 F3000 ;Wipe out
G1 Z10 ;Raise Z more
G90 ;Absolute positioning

G1 X0 Y{machine_depth} ;Present print
M106 S0 ;Turn-off fan
M104 S0 ;Turn-off hotend
M140 S0 ;Turn-off bed

M84 X Y E ;Disable all steppers but Z

brisk rain Mar 21, 2023, 5:36 AM

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not just your start gcode. attach the entire gcode file

obtuse crane Mar 21, 2023, 5:37 AM

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how do I do that?

brisk rain Mar 21, 2023, 5:40 AM

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drag the file into discord

obtuse crane Mar 21, 2023, 5:47 AM

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The file is too big.

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11 something mb

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I could splice a smaller model?

brisk rain Mar 21, 2023, 5:49 AM

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No. I want to see the exact gcode that is giving you trouble

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Upload it anywhere and provide the link here.

obtuse crane Mar 21, 2023, 5:51 AM

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Ok, let me see what I can do.

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Here. You can download the file from here.
https://drive.google.com/file/d/1_0C3RlyCUif61vAEND94TJJoHe3PwSUA/view?usp=sharing

Google Docs

CE3E3V2_new_wingspan_holder.gcode

brisk rain Mar 21, 2023, 5:56 AM

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do you have a photo of the issue?

obtuse crane Mar 21, 2023, 5:57 AM

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I tried printing it a few time.

The latest one I successfully printed it after adding 20 to the flow.

Here are the pictures from the earlier failure.

brisk rain Mar 21, 2023, 5:58 AM

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did you calibrate your "esteps"?

obtuse crane Mar 21, 2023, 5:58 AM

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Yeah

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Its at 100.

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Or close to it.

brisk rain Mar 21, 2023, 5:58 AM

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explain how you calibrated it

obtuse crane Mar 21, 2023, 5:59 AM

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I extrude 100 mm, then measure making sure it is 100 mm. Or very close to it.

brisk rain Mar 21, 2023, 5:59 AM

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how did you extrude 100?

obtuse crane Mar 21, 2023, 5:59 AM

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Using the machine itself.

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I have no idea how I would do it with cura.

brisk rain Mar 21, 2023, 5:59 AM

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typically the controls on the machine command the extruder faster than it can actually reliably melt

obtuse crane Mar 21, 2023, 6:00 AM

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brisk rain Mar 21, 2023, 6:00 AM

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go into the settings of the machine and set the max E speed to 2mm/s then calibrate esteps

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then set the max e speed back to whatever it was

obtuse crane Mar 21, 2023, 6:00 AM

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With the picture you if you look closely you can see that it was fine for the first few layers. Then it start getting messy.

Hmm, okay.

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This is what the first few layers actually look like.

brisk rain Mar 21, 2023, 6:01 AM

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you still have the stock extruder?

obtuse crane Mar 21, 2023, 6:02 AM

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Yeah, I kept it just incase it wasn't the stock extruder. I upgraded it to all metal.

brisk rain Mar 21, 2023, 6:02 AM

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Sorry. I mean using the stock

obtuse crane Mar 21, 2023, 6:02 AM

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No, I upgraded.

brisk rain Mar 21, 2023, 6:02 AM

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the "new all metal extruder" is not really an upgrade

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it's the same terrible design

obtuse crane Mar 21, 2023, 6:02 AM

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Ah I see.

brisk rain Mar 21, 2023, 6:03 AM

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Consider getting a "BMG clone". cheap is fine. it's a good design.

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they're on amazon and whatnot

obtuse crane Mar 21, 2023, 6:04 AM

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Looking for one.

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They haver different types.

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https://www.amazon.com/SIMAX-3D-Extruder-Performance-Upgrading/dp/B07TZ3Z83S/ref=sr_1_2_sspa?crid=1SKX7RK90KYM9&keywords=bmg+extruder+ender+2&qid=1679378646&sprefix=bmg+extruder+ender+2%2Caps%2C96&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyREVRUFo0R1Y2MEdJJmVuY3J5cHRlZElkPUEwNzYwNjIxMjVIUzlLVURYSExNWSZlbmNyeXB0ZWRBZElkPUEwNzA5NzQ3M1BOV1pMV0FDWTdETSZ3aWRnZXROYW1lPXNwX2F0ZiZhY3Rpb249Y2xpY2tSZWRpcmVjdCZkb05vdExvZ0NsaWNrPXRydWU=

Dual Drive BMG Bowden Extruder 1.75mm High Performance Upgrading Pa...

Product Characters A. SIMAX 3D Dual Drive BMG Bowden Extruder utilizes an internal gearing ratio of 3:1 together with precision, cnc-machined hardened steel drive gears to give you a compact powerhouse for all your applications. B. Unique Dual-Drive technology delivers uninterrupted material flow...

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Like this?

brisk rain Mar 21, 2023, 6:05 AM

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anyways, inconsistent extruding and considering the extruder you have that would be my first guess. but yeah, verify the esteps at a slow speed

obtuse crane Mar 21, 2023, 6:05 AM

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go into the settings of the machine and set the max E speed to 2mm/s then calibrate esteps
then set the max e speed back to whatever it was

brisk rain Mar 21, 2023, 6:05 AM

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obtuse crane Like this?

that's fine

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yeah

obtuse crane Mar 21, 2023, 6:05 AM

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Yeah, I hate how it squishes the filament.

brisk rain Mar 21, 2023, 6:06 AM

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you will need to significantly change your esteps if you do try that bmg since it has a reduction gear, just fyi

obtuse crane Mar 21, 2023, 6:06 AM

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The one attached looks like it grips the filament with teeths, not squish it. So it would be better.

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As for the Z motor, I think there is nothing wrong with it. I plan to return the new one and go back to the old one.

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Okay, will do the steps you mentioned.

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I will report back after a another test run. Prolly tomorrow.

brisk rain Mar 21, 2023, 6:08 AM

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👍

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some people in the comments say that bmg doesn't "fit" the ender 3 cause it bumps stuff, maybe look around, but also take the reviews with a grain of salt. it literally can bolt on anywhere

modern ibex Mar 21, 2023, 6:15 AM

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What material are you printing with?

obtuse crane Mar 21, 2023, 6:18 AM

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I can't find max e. There is a Vmaxe, amaxe and E step/mm

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PLA +

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@brisk rain

brisk rain Mar 21, 2023, 6:21 AM

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vmaxe

modern ibex Mar 21, 2023, 6:22 AM

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@obtuse crane my gcode preview says you use abs settings ...that might be a fluke but check your slicer and its flow rate

brisk rain Mar 21, 2023, 6:24 AM

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I don't know where you are getting that

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temp is 215 and bed is 75

modern ibex Mar 21, 2023, 6:27 AM

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Yes but what about partcooli g flowrate etc settings

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Especially since 75c for pla is pretty uncommon

obtuse crane Mar 21, 2023, 6:28 AM

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@brisk rain it perfectly at 100 mm now

brisk rain Mar 21, 2023, 6:28 AM

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it changed?

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75c is definitely a toasty bed for PLA, but I don't think it's going to cause the issues we are seeing

obtuse crane Mar 21, 2023, 6:31 AM

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The PLA+ can handle up to 80 but I have it at 70.

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I did the change and it is still at 100 mm.

modern ibex Mar 21, 2023, 6:32 AM

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I would bet on the Capricorn tube but i have hate for that bad product

obtuse crane Mar 21, 2023, 6:32 AM

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If it is that bad, then why does everyone suggest it. I doubt it is the tube.

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The filament goes through it just fine and smoothly.

modern ibex Mar 21, 2023, 6:32 AM

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thats a great mind set everybody says its good so it work

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it helps with good quality filament and in professional machines

brisk rain Mar 21, 2023, 6:33 AM

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@obtuse crane but you did have to change it to get it at 100 again?

obtuse crane Mar 21, 2023, 6:33 AM

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It always was at 100.

modern ibex Mar 21, 2023, 6:33 AM

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otherwise if you have a little more then usual varaiantion in filament diameter you are in for a world of hurt

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are you sure you are not mixing flowrate on your printer with extrusion multiplier?

brisk rain Mar 21, 2023, 6:34 AM

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@obtuse crane did it go slower when you commanded 100mm?

obtuse crane Mar 21, 2023, 6:34 AM

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Yeah.

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It went slower.

brisk rain Mar 21, 2023, 6:34 AM

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I'm blaming your extruder then. Take a look what it has going on when the trouble is happening

modern ibex Mar 21, 2023, 6:34 AM

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okay lets take a look on your gcode now that im on my pc

obtuse crane Mar 21, 2023, 6:34 AM

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Ok.

modern ibex Mar 21, 2023, 6:35 AM

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https://tenor.com/view/pokemon-detective-pikachu-pikachu-magnifying-glass-cute-gif-15629921

Tenor

obtuse crane Mar 21, 2023, 6:35 AM

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I have, even with new parts and such, the result all the same. Lol.

modern ibex Mar 21, 2023, 6:36 AM

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obtuse crane If it is that bad, then why does everyone suggest it. I doubt it is the tube.

you are putting ferrari tires on your fiat 500 too 😄

obtuse crane Mar 21, 2023, 6:37 AM

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Somewhat. The higher quality printers that are steps up are essentially the same but with better parts in some form.

modern ibex Mar 21, 2023, 6:38 AM

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first your printbed is tilted

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you are to far away on the left

obtuse crane Mar 21, 2023, 6:38 AM

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I have it all perfectly now.

modern ibex Mar 21, 2023, 6:38 AM

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then you run into something that happens alot with hexagon patterns

obtuse crane Mar 21, 2023, 6:38 AM

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modern ibex Mar 21, 2023, 6:38 AM

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you have a ton of retration / detraction in ashort timer

obtuse crane Mar 21, 2023, 6:39 AM

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Yeah, I have that noted.

modern ibex Mar 21, 2023, 6:39 AM

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perfect how did yo fix it

obtuse crane Mar 21, 2023, 6:39 AM

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Better spring, and bed level test files. Long tedious process.

modern ibex Mar 21, 2023, 6:39 AM

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and the stringing

obtuse crane Mar 21, 2023, 6:40 AM

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I have the flat springs instead of the rounded ones.

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https://www.thingiverse.com/thing:34558

Bed Leveling Calibration Test Object (Parametric) by pgreenland

Parametric version of bsutton's excellent bed level test object. Includes a greater number of test points spread evenly across the bed.
This object is designed to help you check that you are correctly leveling you printer bed. It prints nine super thin squares in each corner of you printer bed.
The objects should appear even with a smooth surface.

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This is the bed test.

modern ibex Mar 21, 2023, 6:41 AM

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thats not explaining the stringing

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im asking for stringing

obtuse crane Mar 21, 2023, 6:41 AM

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Yeah, I think its the program. I do not know why it is doing that.

The first few layers as mentioned is perfect, then boom stringy right on the next layer.

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Then I add 20 to the flow then perfect again. I think its the program messing up something.

modern ibex Mar 21, 2023, 6:42 AM

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that usally speaks for wrong retractin settings

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but i have to say there are so much that i would be surpised if it would not make issue on my prusa too

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each pink / glue dot is retraction related

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do you got the stl for me? id like to test something

obtuse crane Mar 21, 2023, 6:44 AM

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Its above

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Google Link.

modern ibex Mar 21, 2023, 6:45 AM

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thats the gcode not stl

obtuse crane Mar 21, 2023, 6:45 AM

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Its litterally the STL file.

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I mean the spliced file.

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https://drive.google.com/file/d/1_0C3RlyCUif61vAEND94TJJoHe3PwSUA/view?usp=sharing

Google Docs

CE3E3V2_new_wingspan_holder.gcode

modern ibex Mar 21, 2023, 6:46 AM

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...

obtuse crane Mar 21, 2023, 6:46 AM

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Do you want the file before the splicing?

brisk rain Mar 21, 2023, 6:47 AM

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the original message has the thingiverse link

obtuse crane Mar 21, 2023, 6:47 AM

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https://www.thingiverse.com/thing:5775331/comments

New Wingspan Egg and Food Holder by SciTeacherEd

I enjoyed using Xavier Derrey's Wingspan Egg and Food Box (https://www.thingiverse.com/thing:3614941), but with the expansions we were running out of room, so I modified the design. I added two additional slots for nectar (as a couple others have also done), made the egg older 1 cm narrower front to back, and used my honeycomb customizer (https:...

modern ibex Mar 21, 2023, 6:47 AM

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yeah saw that

obtuse crane Mar 21, 2023, 6:47 AM

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Ok

modern ibex Mar 21, 2023, 6:48 AM

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anyhow what are your retraction settings? 🙂 and you are sure you are priting with pla settings

obtuse crane Mar 21, 2023, 6:51 AM

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Let se.

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Both the PLA and PLA+ literally have same settings except for the temperature.

Retractions are at 3.0 mm, for both.

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This is Cura default setting btw. Except for the tempt that I manually added.

brisk rain Mar 21, 2023, 6:52 AM

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What retraction speed?

modern ibex Mar 21, 2023, 6:53 AM

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3mm is .. pretty low for a bowden setup (with or without capricorn)

obtuse crane Mar 21, 2023, 6:53 AM

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#

brisk rain Mar 21, 2023, 6:54 AM

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that stock extruder can probably not reliably do 40mm/s

obtuse crane Mar 21, 2023, 6:54 AM

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https://www.amazon.com/Upgraded-Creality-Extruder-Drive1-75mm-Filament/dp/B07WHYBVJ5/ref=sr_1_4?crid=R7FP9W6SE2IR&keywords=ender+3+extruder&qid=1679381689&sprefix=ender+3+extruder%2Caps%2C110&sr=8-4

Creality Upgrade Ender 3 Extruder, Ender 3 V2 Upgrades Metal Extrud...

Creality Original Parts and 100% Brand New.

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This is the one that is installed currently.

brisk rain Mar 21, 2023, 6:55 AM

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frequent retractions might be causing it to become unprimed and extruding little material

brisk rain Mar 21, 2023, 6:55 AM

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obtuse crane https://www.amazon.com/Upgraded-Creality-Extruder-Drive1-75mm-Filament/dp/B07WHY...

it's terrible

obtuse crane Mar 21, 2023, 6:55 AM

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Yup, I get that.

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This one I ordered.

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https://www.amazon.com/Extruders001/dp/B08B4FRR5F?th=1

BMG Extruder 3D Printer Upgraded Bowden Extruder Dual Drive Extrude...

BMG Extruder 3D Printer Upgraded Bowden Extruder Dual Drive Extruder for Creality Ender 3 Pro/Ender 5 Pro/CR10S Pro, Anycubic Mega S, Tevo Tornado Wanhao D9, Anet A8 E10 and Prusa I3 DIY Printer Kits

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Should fit.

modern ibex Mar 21, 2023, 6:56 AM

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Reminds me why i dont like hexagons that much despite hexagone is bestagon

obtuse crane Mar 21, 2023, 6:56 AM

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Yeah, I think its the hex.

brisk rain Mar 21, 2023, 6:56 AM

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extruder should be much better

modern ibex Mar 21, 2023, 6:57 AM

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At least thr way your slicer treats it yes. Not as a single extrusionline but several short piece

obtuse crane Mar 21, 2023, 6:57 AM

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Ima try printing another item and see how that go.

I can understand why the hex can be a problem.

Anyway to print it without all of the extrusion?

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I could test it.

brisk rain Mar 21, 2023, 6:57 AM

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you could disable retractions and turn on combing

obtuse crane Mar 21, 2023, 6:58 AM

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Let see where that setting is.

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Never done this type of printing.

brisk rain Mar 21, 2023, 6:59 AM

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Combing keeps the travels within the print to hopefully keep the strings inside the print instead of across gaps

obtuse crane Mar 21, 2023, 6:59 AM

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Ah I see.

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Which one should I go with ?

brisk rain Mar 21, 2023, 7:00 AM

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uhh, I have to look up the manual on that one every time. the names are so bad

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within infill should be what you want

obtuse crane Mar 21, 2023, 7:02 AM

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Okay

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Gonna test this, with the new sliced file.

brisk rain Mar 21, 2023, 7:02 AM

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look at the gcode preview, you should see that the travels avoid the holes

obtuse crane Mar 21, 2023, 7:02 AM

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Okay

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Damn, 22 hours. Lol

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About 10 hours more.

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But, I will do it for testing purposes.

brisk rain Mar 21, 2023, 7:05 AM

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you should also consider only printing one part at a time

obtuse crane Mar 21, 2023, 7:05 AM

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Yeah, stupid thing. The two object is in one file.

brisk rain Mar 21, 2023, 7:06 AM

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every other free slicer can set up a box to ignore areas of the stl

obtuse crane Mar 21, 2023, 7:06 AM

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Cura doesn't have that?

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Whut??

brisk rain Mar 21, 2023, 7:06 AM

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pretty sure cura is the only one that doesn't 😛

obtuse crane Mar 21, 2023, 7:06 AM

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Pfft...

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What other program is good?

brisk rain Mar 21, 2023, 7:06 AM

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superslicer

obtuse crane Mar 21, 2023, 7:07 AM

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Thought so. I'll give that a try another time.

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Especially when I am going to get a resin printer soon.

brisk rain Mar 21, 2023, 7:08 AM

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also, if you haven't, you should figure out how fast your printer can travel (and at what acceleration)

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then you can tune your travel speeds and whatnot to speed up the print

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~~also, you were going INCREDIBLY slow in that gcode you attached~~

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like, crazy slow

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which.. is usually fine.. but you don't have to go that slow

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or maybe I was looking at the flow and you had low layer heights.. let me look again, lol

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yeah, maybe I lied

obtuse crane Mar 21, 2023, 7:11 AM

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Huh, ok. Give me a min.

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Oh, ok.

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Nvm.

brisk rain Mar 21, 2023, 7:12 AM

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yeah, I just see 1.3mm^3/s and I normally target like 20, lol (on a different printer)

obtuse crane Mar 21, 2023, 7:13 AM

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I can already see the stringy which is not a problem. But again this is just the first layer.

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It's not the stringy I need to worry about. Just ones to expect.

modern ibex Mar 21, 2023, 7:14 AM

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You know what... try z hop

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Normaly i dont reco..end it but yur stringing alings with travel moves so i think that might be a way to improve on it

obtuse crane Mar 21, 2023, 7:16 AM

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Yeah, potentially. It's something I will have to play with. But I want to keep it printing to see if it acts up later.

brisk rain Mar 21, 2023, 7:16 AM

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he also totally turned off retractions, I think you should be able to turn it on when it's a significant travel

obtuse crane Mar 21, 2023, 7:17 AM

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Didn't know that was an option.

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I don't think Cura has that.

brisk rain Mar 21, 2023, 7:18 AM

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"Retraction Minimum Travel Maybe make it like the size of 2 hexes

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it does

obtuse crane Mar 21, 2023, 7:18 AM

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Oh, ok. Looking again.

brisk rain Mar 21, 2023, 7:19 AM

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Maybe the size of 1x hex

obtuse crane Mar 21, 2023, 7:20 AM

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modern ibex Mar 21, 2023, 7:20 AM

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I had hoped i could make hexes 1 continous wall but that doesnt want to work

brisk rain Mar 21, 2023, 7:20 AM

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Enable retraction to see additional settings

obtuse crane Mar 21, 2023, 7:21 AM

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Ok, that's why I didn't see it.

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Hmm, the hex size I am not so sure. Let see.

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It retract after entire hex.

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1 hex is about 20mm

brisk rain Mar 21, 2023, 7:27 AM

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make it 30 or something and see if the gcode preview makes sense

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not retracting between hexes but retracting for a long travel

obtuse crane Mar 21, 2023, 7:27 AM

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Retraction minimum travel right?

brisk rain Mar 21, 2023, 7:28 AM

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yeh

obtuse crane Mar 21, 2023, 7:28 AM

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modern ibex Mar 21, 2023, 7:29 AM

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max retraction counnt and extrusin distance window

obtuse crane Mar 21, 2023, 7:29 AM

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brisk rain Mar 21, 2023, 7:29 AM

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yeah, 100 is a bit extreme, but maybe setting the minimum travel would make that irrelevant

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I don't know what the retractions look like in your screenshot there. are they happening?

modern ibex Mar 21, 2023, 7:30 AM

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im currenty on 5 times on 50 mm s looks nice

obtuse crane Mar 21, 2023, 7:30 AM

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Every white dots are the retractions.

brisk rain Mar 21, 2023, 7:31 AM

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I'm going to play with the stl

modern ibex Mar 21, 2023, 7:31 AM

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i would try z hop when retracted

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that seems to be the best soloution

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mostly because it perfectly aligns with where your stringing happens

obtuse crane Mar 21, 2023, 7:32 AM

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I looked at the failed part, the first layers had the string. So it may just be the first layer thing.

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Nvm saw the print.

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The first layer is almost done.

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Should I change the max extrusion count?

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I'm thinking of scrapping and doing over with different setting.

brisk rain Mar 21, 2023, 7:42 AM

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I suppose you haven't messed with linear advance at all

obtuse crane Mar 21, 2023, 7:42 AM

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Nope

brisk rain Mar 21, 2023, 7:43 AM

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It's a whole thing, and sometimes requires you flash up to date firmware, but not setting it up is not doing things correctly

obtuse crane Mar 21, 2023, 7:43 AM

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Printer is acting up. Hmm.

brisk rain Mar 21, 2023, 7:44 AM

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it lets the printer attempt to compensate for the delay between pushing the filament and when it actually comes out

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it can significantly reduce stringing

obtuse crane Mar 21, 2023, 7:45 AM

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You can see the gap between 2 filament lines

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How do I set that up?

brisk rain Mar 21, 2023, 7:46 AM

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you'll have to google it. I can help if you have struggles, but it's a long process

obtuse crane Mar 21, 2023, 7:47 AM

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If it firmware, I have updated it a little while ago.

brisk rain Mar 21, 2023, 7:47 AM

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then you may have firmware that supports it

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https://marlinfw.org/docs/features/lin_advance.html

Marlin Firmware

Linear Advance

Nozzle pressure control to improve print quality

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This generates gcode to calibrate it https://marlinfw.org/tools/lin_advance/k-factor.html

Marlin Firmware

Linear Advance Calibration Pattern

Create G-code to calibrate LIN_ADVANCE setting

obtuse crane Mar 21, 2023, 7:49 AM

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Okay I see. That will be for another time. I'ma do another setting. I am putting retraction back on.

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obtuse crane Apr 1, 2023, 10:41 AM

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@brisk rain

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I fixed it.

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It was the pom wheels. They were not tight enough. The bed was not sturdy, kept wobbling.

I now have a dual gear extruder that should work.

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https://www.amazon.com/WINSINN-Extruder-Creality-Upgraded-Aluminum/dp/B07SY745CF/ref=mp_s_a_1_4?crid=39NRHV77QAXR3&keywords=ender+3+dual+extruder&qid=1680345835&sprefix=ender+3+dual+extruder%2Caps%2C162&sr=8-4

WINSINN Dual Gear Extruder, Ender 3 v2 Upgrade Motor Shaft>20mm, Co...

WINSINN Dual Gear Extruder, Ender 3 v2 Upgrade Motor Shaft>20mm, Compatible with Ender 3 Pro CR10 Series 3D Printer TPU Filament Drive Feed

#Cura and ender 3 v1