extruder

To get it out of the way first, yes, as everyone else has mentioned... No instructions. However, if you pay attention when you are removing your old extruder, this is a straightforward process. I have been trying in vain to get a large nozzle (1.0 mm) to work on my ender 3 pro for rapid drafting. The stock extruder laughed in my face and skipped like a record when I tried to print with the 1 mm. I installed this extruder, not really expecting that much of a difference, but I had tried every other suggestion for fixing extruder skipping. Slowed the print down, adjusted up my zed offset, changed stepper motors, checked stepper voltage, all that crap. Long story short, I installed this guy and have run a few tests. I started with a layer height of .6 at a print speed of 30. No problemo. I was surprised. So I jumped it up to the .8, same speed. No issues. I went bananas and jumped it up as far as I could possibly need it to go: 1 mm layer height at 50 mm/s (my usual speed for PETG). I'll note here that I ran it at a 1.1 layer width as well. Holy crap, it ran it no problem. You can watch your spool as the life drains out of it at that height and speed, but it does an amazing job now. Just from the extruder change. Buy it. Buy it now. BTW, you can do a layer height the same as the nozzle, but you need to know how to set your slicer. Most people recommend no more than 75 - 80 percent, and that's perfect if you don't want to muck around too much.

With the latest Ender 3 v2 the motor has changed. The shaft is no longer keyed and the factory feed roller is pressed onto the shaft. As a result the new set screw is too high to catch the shaft. Also you need to get the old pressed roller off before you can even see this issue. The result is that this will NOT work on the newer Ender 3. If you look down at your extruder and the motor shaft does not stick up above the roller gear then this will not work. I always wondered how you connect the finger wheel filament feeders you find on Thingiverse for the Ender 3. Now I know with their latest model none of those will work either. Hmm...I guess I can kind of blame Creality for this but the vendor of this extruder needs to be current as well. If they made the lower part of the gear longer and put the set screw down there then it would work but you still have to get the pressed roller off the motor. Now that sounds all negative and if you have that model I guess it is - however, their customer service is absolutely great. They reached out to me immediately to clarify and resolve the issue. Although in the end it has been turned over to their engineers for a permanent solution, they gave me options and refunded super quick. I will definitely buy from them again.

Ordered this for my Ender 3 pro as the teeth were worn and no longer feeding the filament consistently. I have installed similar hardware on other printers, so this one wasn't a big deal, but for someone new to this, the lack of decent instructions may be a bit frustrating. The only other con for me is the inability to add an extruder knob due to the design. Not a deal breaker, but maybe future versions could allow for this. Now for the good: This thing is well built and works like a dream! Anyone that has dealt with the old style single gear extruders know how aggravating feeding new filament can be! Sometimes it seems almost impossible to get it aligned and feeding properly. No such issue with this one. Feeds right through, and no slipping or jumping. I'm also not seeing the filament dust accumulate around the drive gears like in others. Would definitely purchase again!

Fits biqu b1, but filament sensor does not work directly with it. What I’m doing is just unscrewed the sensor and let it hang there and works just fine. I’m getting 2 more. Need to adjust esteps for extruder. Mine is running right at 139 e steps per mm and I noticed it prints much better with 105% flow rate. I may go ahead and adjust the e steps to get the flow rate correct at 100%. Big upgrade, dual gear drive is so much better I would imagine than just the bearing with low grip on filament. Also, get some small tweezers and reverse each of the pins in the extruder drive motor plug, as if not, it will run backwards.

This unit looks like a lot of them. Once I started assembly I found it's shortcomings. The gear comes with 2 washers which if installed with a touch of grease should prevent the aluminum from being worn into for a very long time. I ordered a 3m x 25m shoulder bolt that has 3m shaft and 3m threads. Only one I could find was stainless steel and it costs $13.00. The kit is supplied with a fully threaded bolt that the 2 cages roller bearings must ride on. Then, the gear in the tension arm is lower than the threaded hole that the fitting for the Bowden tube slides into and I had to raise the entire unit with a oversized 3m washer. After replacing the motor bear with the supplied unit, I had to raise the gear within thousandths of an inch, almost even with the top of the D shaft. Now, the knob that turns the feed wheel will no longer work. This unit is very poorly engineered. I do not recommend it to anyone.