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buckeyestargazer
(@buckeyestargazer)
Estimable Member
Cleaning nozzles?

What do you use to clean off your nozzle?  A brush of some kind, or ....?

Posted : 26/07/2020 9:04 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Cleaning nozzles?

I used brass brushes and ESD-13 Tweezers for the outside.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 26/07/2020 9:21 pm
buckeyestargazer
(@buckeyestargazer)
Estimable Member
Topic starter answered:
RE: Cleaning nozzles?

@charles-h13

Do those scratch the nozzle at all?  I have a microswiss plated wear resistant nozzle that works very well at not allowing filament to stick, but when it does I don't want to clean the nozzle with anything that might scratch it and lead to more filament sticking.

Posted : 26/07/2020 9:24 pm
buckeyestargazer
(@buckeyestargazer)
Estimable Member
Topic starter answered:
RE: Cleaning nozzles?

Also, just to be clear I'm looking for something to clean the outside of the nozzle while still connected to the heat block.

Posted : 26/07/2020 9:25 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Cleaning nozzles?

@buckeyestargazer,

i have built my own brush with PA6.6 strings. This way the nozzle, no matter what material, will not be scratched or damaged.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 26/07/2020 9:36 pm
buckeyestargazer
(@buckeyestargazer)
Estimable Member
Topic starter answered:
RE: Cleaning nozzles?

@karl-herbert

That looks perfect.   But I have no idea what PA6.6 strings are or where to get them.  How did you make your brush?

Posted : 26/07/2020 9:45 pm
bobstro
(@bobstro)
Illustrious Member
RE: Cleaning nozzles?
Posted by: @buckeyestargazer

Also, just to be clear I'm looking for something to clean the outside of the nozzle while still connected to the heat block.

Lately, I'm getting the best results using small strips of corrugated cardboard. Easy to scrape off gunk without risk of shorting or damaging coated nozzles. Gives a bit of an edge for scraping nozzles and sides of heater block. Moderately "green". I keep a small pile of 1in/25mm squares handy. I'll use a soft brass brush on problem areas if not worried about coating or wires.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 26/07/2020 10:09 pm
pcweber
(@pcweber)
Estimable Member
RE: Cleaning nozzles?

@karl-herbert

Hi,

Is that nylon string, approximately 1.5mm used for weed eaters?

Phil

Stay safe and healthy, Phil...
Posted : 26/07/2020 10:39 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Cleaning nozzles?

@bobstro

Although I have not damaged my nozzles with brass brushes, I might have to give cardboard a try.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 27/07/2020 1:05 am
bobstro
(@bobstro)
Illustrious Member
RE: Cleaning nozzles?
Posted by: @charles-h13

[...] Although I have not damaged my nozzles with brass brushes, I might have to give cardboard a try.  

The nozzle issue was more of a warning from E3D on their Nozzle-X series. They say the warranty doesn't cover use of brushes ... or really anything relating to the coating. The bigger issue for me was the occasional spark or snag working around the hotend. I can use the cardboard any time without worry. The straight edge also works as a bit of a squeegee to pull stuff away. Nothing wrong with both, of course.

 

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 27/07/2020 4:13 am
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Cleaning nozzles?
Once i had the misfortune that, when the nozzle was heated, cleaning it with a brass brush, caused a short circuit on the heating block and damaged the insulation. Fortunately the Einsy didn't get any damage.
The brass brushes leave marks on the nozzle in the form of scratches and brass residues. To prevent this, I built my own brush with 0.5mm nylon threads. This allows me to heat the nozzle to 250 degrees C. and brush over it briefly to remove filament residues from the nozzle. For the complete cleaning of the hotends I take it out and work on it with heat and several brushes.
Currently I am building a more stable brush with PEEK strings, which are more temperature resistant (up to 350 degreesC.).
 
I have been using the nylon brush regularly for over a year now to clean the warm nozzle at max. 250 degrees C.
 
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 27/07/2020 10:04 am
cwbullet
(@cwbullet)
Illustrious Member
RE: Cleaning nozzles?

@karl-herbert

I am very careful to avoid that side.  I have had a similarly enlightening experience with tweezers.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 27/07/2020 10:07 am
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Cleaning nozzles?

@charles-h13

If you are out of luck, a short circuit between thermistor and heating block can damage the Einsy board. Therefore I avoid working with metallic objects in this area. One second of inattention and it happens.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 27/07/2020 11:33 am
pcweber liked
buckeyestargazer
(@buckeyestargazer)
Estimable Member
Topic starter answered:
RE: Cleaning nozzles?
I have been using the nylon brush regularly for over a year now to clean the warm nozzle at max. 250 degrees C.
 

Please tell us how you made this brush and the materials used.

Posted : 27/07/2020 12:26 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Cleaning nozzles?

@karl-herbert

It is not matter of luck.  It is a lack of precision by the user.  All you have to do is stick to the bottom and not the sides.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 27/07/2020 12:55 pm
pcweber
(@pcweber)
Estimable Member
RE: Cleaning nozzles?

One could always turn the printer off to clean the nozzle and heater block. 

Stay safe and healthy, Phil...
Posted : 27/07/2020 1:05 pm
bobstro
(@bobstro)
Illustrious Member
RE: Cleaning nozzles?
Posted by: @charles-h13

[...] It is not matter of luck.  It is a lack of precision by the user.  All you have to do is stick to the bottom and not the sides.  

Just remember to tell those brass bristles! Mine tended to pull away from the brush after a bit of rubbing.

When things go amiss, I do get filament up the sides and in the wires. That was what led me to look for a non-conductive solution. A wooden toothpick or similar can also be helpful as even scrubbing the wires with a non-conductive brush can be tricky.

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 27/07/2020 1:07 pm
Neophyl
(@neophyl)
Famed Member
RE: Cleaning nozzles?

You can buy nylon brushes.  I bought a pack ages ago that had steel, brass and nylon types in several sizes for my lathe and use the small brass and nylon ones on my printers.

Posted : 27/07/2020 2:13 pm
cwbullet
(@cwbullet)
Illustrious Member
RE: Cleaning nozzles?

@bobstro

I have used long cotton. tip swabs (wood end) also,.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 27/07/2020 2:59 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Cleaning nozzles?

@buckeyestargazer

Buy some 0.4-0.5mm Nylon or PEEK strings. For the mounting and the fixing of the nylon strings I used 3d-printed nylon (PA12) parts.
The nylon strings are threaded in zigzag, the holder is screwed to the handle and finally the nylon strings are cut through on the open side.

If anyone is interested, I can provide cad (step) data.

 

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 27/07/2020 4:42 pm
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