BIQUH2 V2S Extruder New Upgraded Dual Gear Extruder, Smooth Not Easy to Block 3D Printer Direct Extruder 1.75mm Suitable for Most FDM 3D Printers

I have some slight concerns that the gears might not be perfectly centered. There seems to be a tiny bit of fluctuation in extrusion that isn't explained away by deviation in the filament (there isn't any). It is possible its something else I have not yet thought to test.The wiring included could be longer. Expect to need to lengthen them or use extensions.A bit heavy still, but light enough for most printers to not be impacted. I'm pretty sure the glass on the bed of most bedslingers will limit you more than the weight of the H2.It has done well in every other regard.I'm not using the included fan however, due to only having 12v available on my printer. It is on a raspberry pi 3 at the moment and barely moves any air when running off 12v, but enough to keep a pi3 from throttling. I don't think it'd be a problem at 24v, but I don't have a 24v power source to test with to confirm that.

It took a little while to get going on my ender5 pro. I needed to print a mounting plate, and then needed to print duct for a cooling fan. Inconvenient, but not too big a deal. The the printed mounting plate introduces some slop into the carriage. I used a ABS like resin to print those parts, and its help up well. What I DON'T like with the extruder is the lack of mounting holes. There are only 2 per "face". I feel like I can never get it fully secured.Once over these hurdles I finally got it working and printing nicely. (did take a little time to sort out the esteps. I managed to go through a couple rolls, then I had a major failure. The kind where the filament blobs up and encases the entire hotend, nozzle and in this case even some of the extruder.I reheated the hot end, and was able to carefully remove *most* of the caked on PLA. but the extruder never worked as well after that. It started under extruding. I checked for clogs, then disassembled the unit to check for obstructions. But still under extrudes.I manually feed filament through it seems to flow nicely, but whenever it prints it seems to lose its grip. As it will feed fine, then inexplicably stop feeding (the gear is moving). This has happened with multiple filaments.Very frustrated at the moment, as I really want to like this extruder. I will reach out to BiQU for support, and will update this review if they can help.

I had a lot of experience with Sprite extruders which work well, on my Enders. Then I bought a Sovol SV04 with subpar stock extruders and couldn’t handle it so I went for a Biqu H2 and it did not disappoint.It extrudes muuuch faster and more consistently than my stock extruder did. I haven’t done a side by side but it seems like it would run circles around sprite extruders too. Plus it’s nice that the tensioner locks open for loading, though it is slightly more difficult to get the filament down through the gears and directed into the nozzle. I interpret this as less free space for my filament to get jammed in and that’s a positive aspect so worth dealing with a little bit harder to poke it in.The dual gear drive was EXACTLY what my original extruders were missing and needed so badly. Even with floppy TPU being shoved through a big 0.8 nozzle at high speeds, it rips. No jams. Can’t wait to do some flow testing and upgrade to a Bondtech CHT nozzle and it’ll really fly.I was impressed with the completeness of the package, had all cables and even most of the screws needed to get it together. Really I only needed to add screws for my duct fan, everything else was included.Obviously this is not a plug and play upgrade. I 3D printed a mount for the Biqu to fit my printer, and a fan mount and duct as well. The servo wiring was the same as my stock extruder so I left it where it was, and just had to run the two fan cables and thermistor and heater cables. All were plenty long to reach my ribbon cables breakout board on the gantry, though I had to get the correct JST terminals for my printer and solder all four connectors.In Klipper, the setting changes were minimal, just changed the ratio to a number I found in a write-up and PID tuned the new hot end and I was off to the races. I had to recalibrate my X Y and Z offset for proper positioning on the bed, then it could run any of my old gcode just BETTER.I will almost undoubtedly be buying more of these. Great product.

Once it arrived - I was surprised by everything that come with it. Heater and temp probe with wires. Some have said that the wires were a little short, but they were plenty long for my Ender 3. The BIQU H2 V2S Extruder is not plug and play. You will need to print a mounting bracket - there are many different versions out there. I love the dual metal gear direct drive all in a very small compact package. It is almost as light as the oem setup. I had no problems mounting and wiring. Getting the e-steps calibrated did take a little while. The manual recommended to start at 932. I actually ended up at 2200 when I finally got it really dialed in. I also had to re-tune the PID settings for the hotend heater. I have been printing PLA mostly and switching to PETG this works much better than the oem bowden tube setup. Currently retraction settings of Speed @ 4mm/sec and distance @ .4mm. Some have complained about clicking but I haven't had that problem. So far I have used PLA and PETG. With the PETG I am getting much cleaner prints, no stringing as I did with the oem bowden tube setup. PLA printered well for me with the original bowden setup for several years, but I wanted to transition to PETG and the BIQU H2 V2S Extruder is working really well.