Redrex Dual Gear Ender 3 Extruder with Nema 17 Stepper Motor Compatible with Creality Ender 3 V2,Ender 3 Pro,Ender 3 Neo,Ender 3 V2 Neo,Ender 3 Max Neo,Ender 5,Ender 7,CR6 SE,CR10 3D Printers

It works very well as long as the gears are meshed properly, also make sure your nozzle isn’t jammed because it will make a real nasty flat spot in your filament, it’s twice as bad as the stock one because obviously it’s got 2 gears instead of 1, this was the first upgrade on my ender 3 v2 neo, it was very easy to do and I haven’t had any problems with it yet although make sure the bearings are greased up with some wd40 or something to prevent wear and metal shavings making it’s way into your hot end, and also make sure you don’t over tighten the free spinning gear as it will cause excessive wear on both the metal housing and the electric motor. The install was super easy, quite literally plug and play, the hardest part was getting the old one off and the new one on but as everything fits in the same place that still wasn’t very hard.

""" IMPORTANT ***I have a later model Ender 3 Pro which has the shorter shaft (see photo) with pressed on brass gear. If this is what you have then you will need to buy the extruder plus stepper motor for the extra 10 bucks.So I was getting some filament slip on the original extruder and getting wall separation etc.Bought this and was extremely easy to install and works perfectly. Steel gears is a definite plus. I calibrated the extruder and for me 139mm as close to perfect that I could live with.The print I had been having trouble with amongst others was the WTC 11/10/2001. After two failed attempts I troubleshot that I was getting filament slippage. Third time with this new extruder and e-stepper motor corrected the slippage issue and a nice print as a result.Good bang for the buck and would recommend this and buy again if I needed to.

The teeth on the gear are so sharp and it’s such a tight fit that if you release the gear in order to feed new filament quickly by hand, the filament gets stuck on the teeth and shaves a small amount of filament off as you must force it in.I have seen other reviews that say you can widen the feed hole to avoid this. I’ll try that but I wish it worked out of the box.The filament certainly will not slip over the factory single gear.

What is there to say. Its works perfect and is easy to install.The instructions could be better. When changing from a single gear extruder to a dual gear extruder you must reset your e steps to 139 on an ender 3.

buyer beware! To start off, I'd like to say this review is not in any way on the seller.The seller shipped the item perfectly on time. And affordable price. This review is solely on the quality standards of the manufactured part. Only. Specifically the motor. To start off, I had issues with print quality after installing parts. On my under 3 printer. I was getting under extrusion on my print. After 2 weeks of extensive trial-and-error problem solving, track down exactly what was going on. The main problem was this motor. The motor was skipping timing steps. Because of 2 issues, stator windings was not to the exact specified winding for. The end or 3 printers. The second issue is on the rotor. The rotor does not have a magnetic shielding Along the stater rotor veins The shielding ensures magnetic field alignment along rotor and stater veins for better timing. You can see this on the pictures that I've included on the right is the original creality steper motor with the shielding in Gray. It is an epoxy magnetic shielding filled in the grooves along each rotor vane. On the left is this manufacturer's motor which does not have any shielding whatsoever along with the grooves on the veias. A result, the magnetic lines do not align perfectly when motor is in operation. Timing and slippage will result with this coupled with the windings. Being insufficient. For the motors themselves make the motor incompatible for ender 3printers period!!!! This is more or less a quality control issue with the manufacturer and as I do not know if these motors will work on any other FDM printersBrand. I am not returning these motors. As I have found a workaround to mostly circumvent this issue. Both software and hardware wise and I still needed the 60mm length on the rotor shaft. In my steps to finding out the problem, I had a electrical engineer used acillascope to test motor timings. While those are big issues, the biggest issue is with the dual action extrader gear. On the original Ender, 3 series.The extruder gear is brass measuring at11.2mm in Diameter The dual action gear extruder Which is metallic silver with a red body frame The gear itself measures.At7.4mm In Diameter. Physics 101 big Gear turns filament faster While A smaller gear turns filament slower aka Under extrasion on printed parts The only way around this is reprogramming the printer firmware To accommodate the size change in the gears.

I kept having horrible luck with my prints bought many upgrades that eventually didn’t fix the issue. Decided to lastly upgrade to the all metal extruder and immediately saw difference in print quality amazing

I was having underextrusion issues with my prints on my ender 3 Max Neo and noticed filament shavings from the extruder. This dual extrusion setup has had no slippage, and has made beautiful prints. The only things u need to know to install is that its important to line up the roller and motor gears and filament groove, which is kinda annoying if you have big hands, and then u need to go to control>steps per mm> Extruder and set what should read "100" to 139, u can test this and dial it in by removing the feed tube, cutting the filament flush with the extruder, and going back to prepare>move>Extruder, and setting it to 20mm, then measure the filament with a caliper. Adjust the steps per mm until this comes out as exactly 20mm.directions also said to lubricate the gears, so i just used gear grease. I have about 12 hours of print on it now and will update on reliability.

Fonction super bien, le nouveau moteur et les gears on règlé les problème que j'avais avec l'ancien qui aviait de la misère à extruder. Une fois le E-step ajuster tout fonctionnait parfaitement.

Ho dovuto sostituire il sistema di estrusione della mia ET4 in quanto era "ciofechico" ai limiti della snervatura umana... 🤯Con questo sistema, finalmente, tutti i miei problemi sono stati risolti:- Il motore stepper non scatta più e posso stampare più velocemente- Non ho più problemi di trucioli- Il riempimento viene estruso correttamente e a trama robusta senza perdere alcun passo- Ho finalmente smesso di correre nudo senza meta ululando improperi alla Luna 🌛Sulla mia ET4 ho dovuto costruire un piccolo supporto per alzare il rilevatore del filamento e metterlo nella posizione corretta affinchè non andasse a toccare la barra filettata dell'asse Z. Poi ho dovuto invertire due cavi del motore stepper in modo da farlo girare nel senso inverso e, infine, ho regolato l'E-Step.Finalmente posso stampare tranquillo e super-felice!!! 🤪

Der Einbau ist wirklich sehr einfach, selbst mit größeren Händen. Die Anleitung ist verständlich und der Artikel ist passgenau. Die Verpackung ist mehr als ausreichend und die einzelnen Teile sind sehr gut gesichert.

L'extrudeuse est top. Rien à redire.Le motor a eu besoin d'une grosse calibration, mais sinon il fait son taff.Je l'ai installé sur une Ender 3 modifiée pour être en direct drive. Ca marche très bien en soit MAIS j'ai été contraint de changer la hot end pour un modèle tout en métal (ceux qui indiquent une température max de 300°C au lieu de 250). Sans ça le plastique ne fond pas suffisamment tôt dans la tête ce qui fini par bloquer le moteur. L'autre option aurait été de ralentir l'impression à 15mm/s au lieu de 50mm/s qui est pourtant déjà relativement lent.Au final. Entre le support de direct drive à 20€, l'extrudeuse et son moteur à 30€ et la tête d'impression à 30€ également, j'aurai dû directement prendre une sprite pro :')

Todo muy bien hecho y funciona bien