![]() ![]() The default heat break of the H2 is PTFE lined with Capricorn, this means by default the printing temperatures are limited to 260C. Although the default tension set seems to be fine, there is no easy way to adjust it if you need to do so. One thing that did notice is that there seems to be no way to adjust the tensioning of the extrusion mechanism. It does mean that at such point you need to disassemble the extruder, so I’m glad it is so easy to do so. I’m sure this “issue” is not unique to this H2 - it probably happens to any other extruder of similar design. If the TPU has nowhere to go, it is grinded by the extruder. One thing I did notice while printing TPU and I didn’t have my Z-offset right just yet and that if the nozzle is far too low on the bed: the TPU, which is gripped very well by the H2, has nowhere to go while the extruder attempts to extrude it.Ī bit of TPU that was grinded by the extruder because I had my Z-offset too low and the filament had nowhere to go. The other part of the gearbox and the stepper motor. The gears are made of hardened stainless steel, so they should probably hold up pretty well with abrasive filaments too. The gears both push the filament through the hotend. I calibrated the extrusion steps on my H2 and the 932 steps/mm is spot-on for me.Īlso note that the extruder gears are dual drive. The tiny stepper probably needs this gear ratio to get enough torque for pushing filament through in case of you would get a jam. This doesn’t matter however: the stepper motor on the H2 doesn’t emit any noticeable sound. This means that your e-steps (extruder steps/mm) are near 932 steps/mm (as opposed to just 92 steps/mm for a default Creality-style extruder). The extruder part with the gears and the hot end. The way you will mount the H2 to you printer also makes it easy to disassemble it in case you need to do so. ![]() This required some additional effort thanks to how Creality designed the mounting system of the hot-end - but I managed to do it anyway. Earlier I wrote on how to mount it to the Creality CR-6. ![]() In my case, on the Creality CR-6 SE, besides the breakout board I also have the strain gauge leveling system. Note that all the available mounting holes makes it easy to design a mount for it. If you have a CR-style printer by which the cabling runs to a breakout board, after which it runs to the motherboard through a proprietary cable, you need to buy some crimping tools to get the cabling at the correct length. There is also a complete CAD model available so you can start designing you BIQU H2 mount while you wait for it to arrive. There are mounts available from the BigTreeTech website and also dozens available on Thingiverse. If you have a “regular” 3D printer with manual bed leveling, a BLTouch, capacitive sensor, and the cabling running all the way to the motherboard then mounting this extruder is a matter of printing a mount and doing the cabling. You can use it for mounting it to your printer, adding part cooling and mount an Adafruit Neopixe. On each of the four sides, there are two M3 screw holes for bolts. The BIQU H2 compared to a standard AA battery Mounting itīIQU has made this extruder very easy to mount. A stepper motor cable with a JST connector on one end and a dupont connector at the other end.A HT-NTC100K thermistor cartridge crimped with a JST-XH connector.40W Heater cartridge crimped with ferrules.Well packaged we find the extruder at the left side - accesoires at the right side What’s in the box ![]() If we open the box we are immediately greeted by the extruder, and some accessoires. The BIQU BX comes in a nice small box, but it will turn out this extruder itself isn’t actually that big. I wrote an unboxing article earlier about it for full details, so you may want to check that out as well. Comes with a heater cartridge, silent 24V fan, thermistor and cablingĪ graphic from BigTreeTech visualizing the gearing of the BIQU H2 Packaging.The heater block uses E3D V6-style nozzles (it comes with a wide UM2 nozzle).It works with 1.75mm filament, which your printer probably already uses.Extruder has a 7:1 gear ratio with dual steel gears powered by a flat pancake stepper motor.To compare to the stock Bowden extruder my Creality CR-6: just the stock fan shroud of the Creality CR-6 alone is nearing 80 grams. An direct drive extruder of about 220g of weight.It comes at about $90 (€80 on 3DJAKE) and this gives you: The BIQU H2 (hydrogen) is a direct competitor to the E3D Hemera direct drive extruder. I’ve had the “World’s lighest direct extruder” for a month now and let’s see if this is a true direct drive without compromises. This extruder the same extruder as mounted on their BIQU BX 3D printer. BigTreeTech sent me their BIQU H2 direct drive extruder for review. ![]()
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