RE:
Indeed - can you imagine my surprise as Prusa Support actually suggested heating the nozzle, then drilling out the clog/obstruction using a power drill with 1.5mm drill bit? (I assume they meant from the top opening)... I feel this CHT nozzle is more prone to clogging than a "standard" nozzle due to the internal structure.
I have not kept up with nozzle technology, but are these CHT nozzles a new development? Perhaps some tool marks or burrs were left in the nozzle after production?
The nozzles are not new. I don't use a high flow nozzle unless the type of material and size of the print gives me a significant time benefit. So I mostly use hardened (diamondback) standard flow nozzles and if I'm going to do a very large PETG or PLA (which is rare) project I'll switch to HF Obxidian. If it's only going to shave less than 30 min or so then I don't bother at all with HF. I'll never run a high temp filament through a high flow nozzle, getting those unclogged can be particularly hard. I got lucky once after doing 2 cold pulls.
For drilling out the nozzle, the idea is to twist the nozzle by hand on the drill bit attached to the drill rather than power the drill to drill it out which could potentially (I would assume) cause all sorts of damage.
RE: Constant clogging
I am not sure if this issue is CHF nozle related.
Since the upgrade of my mk4s to core one in March I print PETG with CHT nozle brass without any clogging. Some of these prints take longer than 6 hours.
It's a strange idea to drill out the nozle. This will destroy the nozle structure inside.
RE: Constant clogging
I am not sure if this issue is CHF nozle related.
Since the upgrade of my mk4s to core one in March I print PETG with CHT nozle brass without any clogging. Some of these prints take longer than 6 hours.
It's a strange idea to drill out the nozle. This will destroy the nozle structure inside.
Don't "drill it out" just use a drill bit and manually twist it to remove carbonized debris from nozzle. If you use a drill then, sure you will damage the nozzle.