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Bambulab hotend on Apollo - high quality and cheap (Patreon)

Published:
2023-02-05 22:09:24
Edited:
2023-06-11 13:11:45
Imported:
2026-06
Tags:

Content

edit: thanks to Sethro_ who contacted bambulab we have the following info "Resistance is 100kΩ@25℃(±1%) and B-value is 3950K@25/50℃(±1%)"And that match the klipper Generic 3950 profile.sensor_type: Generic 3950So you can now safely get the thermistor from bambulab

------Files are in the Apollo Zip ( master repo page )  

As some of you may know from discord, one of my patron brought up the bambulab hotend.

So looked into it and turned out to be a great setup.

flow is in line or barely above dragonfly, dragon ST, XG, v6, about 13~15mm3/s with some PLA filament I have, I'm seeing Bambulab PLA has it's default set to 21mm3/s in their slicer, but set to 15mm3/a for generic PLA confirming what I see ( I wonder if bambu PLA would have higher flows in normal flow hotends )

heats up to 220C in only 30seconds

--------

You will need the hotend (has no swappable nozzle), the heating element, thermistor and silicon sock from bambulab store. Or buy the whole assembly.

Most bead type thermistor are 1.6~1.8mm, but the bambulab hotend has a 1.4mm hole. So it's best to get the thermistor from bambulab now that we know the specs.

If you want to use the stock ender3 thermistor or an aftermarket one that is too big you'll need to enlarge the hole on the hotend, relatively easy with a Dremel (did it myself as at the time I didn't know the specs of the bambulab thermistor)

----------- Fully assembled hotend (remove fan) ---

https://us.store.bambulab.com/products/complete-hotend-assembly-with-hardened-steel-nozzle-x1-series

--- Or get separate pieces: ---

Hardened steel

https://us.store.bambulab.com/products/hotend-with-hardened-steel-nozzle

Stainless steel

https://us.store.bambulab.com/products/hotend-with-stainless-steel-nozzle

Silicon sock

https://us.store.bambulab.com/products/silicone-sock-for-hotend

Heat cartridge (mounting clip and thermal paste are included)

https://us.store.bambulab.com/products/ceramic-heater-x1-series

Thermistor:

https://us.store.bambulab.com/products/thermistor-x1-series

--------

Install notes:

If you buy the hotend in pieces, use the included grease for the thermistor and heating element, there are some youtube videos you can watch for bambulab hotend assembly ( it's very easy ).  Or get the fully assembled hotend, and remove the fan.

The hotend comes with screws with a non threaded part to keep it more secure.

The heating element comes with a 10cm wire, just long enough and JST XH (the type that usually comes with 5015 fans), I already had a high amp connector on the other end so I swapped and crimped a molex connector on mine.

But since this heating element is 48watt on a 24v system, it only uses 2amp, meaning you can safely keep using the JST XH or swap it to a JST SM ( rated up to 3amp)

Files

Comments

Sethro_

there's also an option to grab the whole assembly (nozzle, sock, heater, thermistor, and fan) for 34.99 (slightly cheaper than just the nozzle, sock, and heater for 35.97). just a thought, plus it includes the thermistor so no modifications if it'll work with the system correctly (will find out when mine arrives, just ordered). whole setup at link https://us.store.bambulab.com/products/complete-hotend-assembly-with-hardened-steel-nozzle-x1-series edit: just saw the part about not being sure of the specs for their thermistor, but cheaper, potentially a good thermistor, and an extra fan sounds good to me. some thermistor info on their page, just not everything. https://us.store.bambulab.com/products/thermistor-x1-series

squirrelf3d

Let me know when you get it, I now regret not ordering the Bambu thermistor since I didn't know the hole would be smaller. With an ohm meter we can figure out the type ( assuming it's a common one ) by comparing other ones you may have on hand. But seeing how nice it printed I might get a 0.8mm nozzle as well ( already have a 0.4 and 0.6mm ), offsetting the shipping cost.

Sethro_

just got it in tonight, will get on changing the plug on it (is a super small white plug, forget the name of the type) to a standard size within the next day or so. the fan that comes with the assembly is a 5v, aluminum shroud. extra thermal paste and screws for mounting are included, the heater and thermistor are held in place with a metal clip (haven't disassembled to investigate any further). if I were to leave the fan in place it'd take some modding to the mount as the "tines" on the top are where the fan mounts, and they act as a wire management of sorts (where they all come out the top). Overall is a super cool setup, and so freaking small!!! Anywho, any pics or info you need let me know, and as far as the multimeter thing I just have to locate mine for testing it to see what it comes up as (was thinking of just plugging it in and seeing what it does as far as reading, don't think it'd do any damage just read funky - not much experience in this area though).

squirrelf3d

No need to investigate further regarding the clip on the prebuilt hotend, all it does is hold the heat cartridge which is a large rectangle sitting on the side and held by that clip. And the thermistor in place ( instead of a screw ) very simple and clever.

squirrelf3d

I think I noticed micro movement of the hotend under the endoscope ( but I need to investigate further, ) so might have to rework the mount, backplate and main body should remain the same. And this should be a relatively easy swap. Edit: so the mount is good, turns out I didn't tighten the hotend mounting screw all the way ( not sure what is blocking the screw, likely plastic from the threaded heat insert ) , what I might do is a through hole for the threaded heat insert Instead of a blind hole

Sethro_

Just heard back from Bambu tech support on info for the thermistor. Here is the information for the thermistor: Resistance is 100kΩ@25℃(±1%) and B-value is 3950K@25/50℃(±1%)

squirrelf3d

Amazing! Thanks for doing that. Funnily enough those are the same type that I bought on amazon Klipper settings is sensor_type: Generic 3950

Sethro_

Awesome news! I wasn't sure if they'd share the info, but I figured I'd ask anyways. Onto more fun!