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

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 3950

So you can now safely get the thermistor from bambulab

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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

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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)

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--- 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

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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)