Knockoff CHT nozzle problems

Bambu Lab P1 Series Troubleshooting
1

I’m having troubles with my CHT nozzle and normal PLA

First off, I’m having troubles with curling on overhangs. On the benchy bow. Secondly, it clogs regularly. It squishes before the copper insert and then fuses to the heat break, becoming stuck… At every temperature, 205 (rated for the filament) and 250…

I’ve also used Sunlu Meta PLA and didn’t experience any of these issues at 200°c. Never had it clogged, or curled.

If I instead use the hardened steel nozzle I bought, the benchy prints PLA perfectly, but at lower volumetric speed (obviously)

What could I do, to make PLA work with my CHT?

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2

I have same problems as you, copper CHT clogged every time when printing PLA, perfect print with PETG and ABS

3

Have you guys confirmed the CHT clone’s nozzle insert is in the correct way? There is one side that is blunt and one that is profiled a little sharper. You want the sharper end facing up at the filament. Not sure if that would cause a clog but seems like it wouldn’t help if it were backwards.

4

Thank you. Can you attach a picture? I’m not understanding where the sharp edge is. I just assembled my CHT (from Amazon seller).

5

By standard the Nozzle in the Hotend ist no CHT when it is delivered.
Its an Standard Hardend Steel Nozzle.
To use it as CHT you have to install one.

6

I don’t feel like digging out my extra nozzles (packed away at the bottom of a box of parts), but here’s a pic of a correctly installed one with the beveled end facing up towards the filament. If I recall correctly, the other side is perfectly flat. I can’t say with certainty that this is enough to cause a problem, but it may… IDK.

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image601×599 37 KB

7

Yeah that definitely wouldn’t help, that’s for sure. The Kingroon knock-off nozzles I bought came assembled though… are some delivered with the insert separate?

8

Yeah, all of mine came separated.

9

Just trying to get trusted so I can post on here lol

10

I’m using the Ali hotend v2 with the 0.4 CHT nozzle too… without any problems, regardless if PLA, PETG or ASA. For printing I use the same settings and speed, I’ve used with the original Bambu Lab 0.4 nozzle. I haven’t recalibrated the filament yet with the CHT nozzle.

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