Bowden Extruder V2.0 DDB Universal Geared Extruder Dual Drive Extruder for 3D Printer

Seems to be a quality product for the price. There was a lot of play with the gear attached to the arm, and I've seen videos where people use a really small piece of bowden tube to make a little washer. So I was prepared to do that when I assembled mine but there was what I thought would be a better fix for it (maybe). The kit comes with a flat white washer that is supposed to go under the arm spring. I simply used that instead to remove the play in the gear and it fit perfectly. I guess I might print a washer down the line if the spring needs it, but everything seems to be working great with this set up.

I bought one to do a direct drive conversion on my CR-6 SE and liked it so much I bought two more and replaced the extruders on my two bowden setups (a CR-10 and Ender 3 V2). Seems very well made. The only thing I did to these units was place a very thin M3 washer on the shaft of the gear on the swinging arm (the one the spring pushes against) to keep it at the right alignment with the other gear that grips the filament. I am not sure why there was so much play in the first place, but easily fixed. If you have a 3D printer you've probably got a lot of stupid little washers rolling around your workspace anyway. ;)

This extruder is the most worthwhile upgrade I have made to my Anycubic Mega S thus far. There was an instant noticeable improvement in layer quality due to improved filament flow. Installation was not difficult, but mechanical aptitude will be helpful. I chose to install the extruder upside down so that the Bowden tube fitting would be the replaceable one. This required reversing of the stepper motor wiring, to get the filament to feed in the correct direction. Also note, the stepper motor drive pinion should be installed with the set screw side out. Otherwise it will not mesh properly with the plastic drive gear, leading to premature wear. One other note, the mounting screws furnished are a couple of threads too short, in my opinion. Don't try to overtighten them, or the motor holes could be stripped. Overall pleased with this extruder.

This Bowden Extruder V2.0 BMG is a truly great design and it works, really works. I installed it on my Flying Bear Ghost 4s fairly easily. There were several ways to do this so you have choices. I used tandem set screws to secure the drive gear and that required a slight trim from an internal plastic part, but not a problem. After that the only issue I had was changing the extrusion factor from 96 to 425 [as recommended by another review]. All problems of clogging, stepper slipping, and grinding were over. This is so strong I can now print PETG at 200% recommended speed! Get this extruder!

I bought this a while back, finally got around to replacing my extruder. Tuning my original extruder, I managed to get it working a bit longer after already ordering this extruder.This extruder is expensive, but had great reviews, so I bit. No instructions really, but managed to get it together, and was able to manually turn the wheel to feed the filament through no problem. Then ended up connecting it to my Ender 3 v2. Even though the motor was turning and all gears moving, the filament just wouldn't budge. It wouldn't move.After spending several hours trying to make it work, it looks like it will end up being a $40 paperweight. Lesson to self, make sure something works properly within return period.Look elsewhere. There's better extruders at a fraction of the cost. Not sure how this one gets such high reviews and costs so much.

So I bought this to replace the extruder on my Anycubic Mega X since the one it came with decided to fall apart (I’m using a bowden extruder system). How did I install it? I ended up putting it on so the words AREN’T upside down like you may have seen some people do on youtube when installing (installing it with the words upside down makes it feed backwards, logically).For the process I went through I had to do some searching, so now I’m typing my process out below so people don’t need to search.At first it worked great, then it started slipping, did some research, needed to adjust e-steps (that’s the number of times the motor turns the gear in the extruder to feed the filament into the hotend). I happened to already have Simplify3D so I plugged the printer into my PC, started Simplify3D, went to Tools > Machine Control Panel, set the port to COM3, unchecked Verbose, go to Communications tab and click Connect (it worked one day and didn’t the day before, Idk). After that I follow Thomas Salanderer’s E-step calibration video and ended up with a new E-Step number of ~377mm/s (from the manufacturer the Mega X is apparently set to 400mm/s which is… impressive(?) for a non-dual drive extruder from what I’ve read) once I had the number to input I typed in the code for the new steps (M92E377 for me) then put in command M500. It should save the settings, but just in case send code M501 (this will call up the data you saw when you first connected BUT with your new E-Step value). Restart your printer, reconnect to your computer and double check that the value remained the same. Then do a test print, and you SHOULD be good.Happy Printing!

Has been a good extruder my only issues have been when Unloading filament using klipper. The small blob at the end of the filament gets caught by the tight tolerance and I have to catch it fast or I'm stuck taking everything apart. As far as printing it seems great for pla.