Has anybody ever used a .7mm nozzle. I had a plug today and everything is cleaned out except the .4mm nozzle. The smallest drill bit i have is a .7mm. I thought about drilling it out and trying it until a new can be had.
Never tried it but seems like a really big hole. Have you tried pushing the debris out from the outside with a fine Gage wire? If the hole isn’t deformed or burred, you shouldn’t need to drill.
Makerbot actually gave me pretty good advice on this. If you heat your nozzle, push a clean cut end of filament in, push till at least some is extruded out the end and quickly pull the filament back out. Cut the melted end off and repeat several times. The melting filament sticks to the debris and the debris is pulled out when you yank the filament out
If it’s removed from the hot end, just place it in a pair of metal clamps and take a blow torch to it (if you have one). ABS and PLA burn out pretty nicely.
Don’t have a torch anymore, darn it. I tried a propane camping stove but don’t know if it gets it hot enough cuz it is still plugged. I will try the method Eric said. If not i could probibly find somebody with a torch somewhere and do it that way.
I once turned a 0.5mm nozzle into a 2mm one because it got jammed and frankly, that hotend sucked anyways.
It worked surprisingly well, the only issue was that the heater (5r6 resistor) had a hard time putting out enough heat to keep the brass assembly hot at the “tip”.
i hv some 0.75 mm nozzle. but never use them. I think for big size and quick build will with these big nozzle.
I think if i can’t get this unplugged fairly easy tomorrow i will just drill it out to the .7MM. Then i will have first hand experience of how it will print,ha
I had used the blowtorch method pretty reliably until makerbot said it technically would void the warranty, so they suggested using the filament to mop it out. I figured I probably shouldn’t gamble with my company’s warranty SMH
E3d have a .65 that apparently works well I don’t imagine you’ll have any problems with 0.7 apart from keeping speeds low enough so the heater can keep up.
Ew, no, don’t use a torch!
The best way to pull a clog out is using 618 from Taulman. Push it in at 240C until the nylon starts coming out the nozzle (push a thin wire up the hole to dislodge the clog if necessary to get the 618 to start coming out), then cool it to 140C and pull it out. You should get a perfect impression of the inside of the nozzle, sometimes with a dark spot in the tip that is whatever was clogging your nozzle. If it comes out looking dirty or black around the edges (usually happens if you’ve previously tried the torch method, which is why I recommend against it), or if you didn’t get enough of the old plastic out so that the piece that you pull doesn’t go all the way to the tip, repeat the process until it does. This process an restore the inside of your nozzle to a better-than-new state.
I do admit, there is a sense of accomplishment associated with a blowtorch
Success!
I soaked it in acetone oven night then used a sewing needle and the hole cleared very easily. I started from the outside, i figured this was the best approach scene the plug was from the inside.
This plug i am confident was because i was under extruding with over temperature. It just burned up, but a .4 MM hole is very small and wouldn’t take much foreign material from this China ABS i am using to plug that hole. Anyway going back together now.
This ABS clear seems to brittle compared to other ABS and it is full of bubbles.
Update on the clear ABS. I cooked it in the oven at about 85 C for maybe 3 hrs. Bubble free and no more cloudy white.