how to clean hot end and nozzle?  

RE: how to clean hot end and nozzle?

I think it depends on, what filament is used and how dirty the block/nozzle is.

I replaced my nozzles with nickel coated ones from Microswiss and primary prints in PTEG - a warm up and a wipe with a paper towel is enough to keep the nozzle clean. I have no need to clean the heater block as it almost free of filament.

I think a clean with a soft brass brush when warm and IPA/Acetone when cold should do the job.

RE: how to clean hot end and nozzle?

Posted by: @atomleef

Please make suggest, how to clean hot end and nozzle? Heat up and wipe with brass brush is enought?

 

thank you

When cleaning the nozzle and the heating block with a brass brush, you should make sure that you do not damage the thermistor and heating cartridge wires. As an alternative, you could also use various fine wooden sticks.

If PLA and PETG extrude cleanly and properly, cleaning should normally not be necessary. 

RE: how to clean hot end and nozzle?

@area51

Thank you, I mainly print with pla. I will try with paper towel first as you suggest.

RE: how to clean hot end and nozzle?

@karl-herbert

If paper  towel is not enough to clean out, I will try soft brass brush as you suggest. Thank for warn me about thermostat wiring I will very carefully with it.  It not much dirty just some burn string make my nozzle look clog. Thank you 😄

RE: how to clean hot end and nozzle?

@area51

Otherwise what is nozzle with coat, what benefit of using it? I am still use default nozzle.

Thank you 😄

RE: how to clean hot end and nozzle?

@atomleef

A nozzle with coating, is a standard brass or copper nozzle with a thin layer of anti-stick nickel - just like a frying pan can have a Teflon layer to prevent the food sticking.

The ones I use is from Microswiss: Plated Wear Resistant Nozzle RepRap - M6 Thread 1.75mm (E3D has some too)

They reduce friction and make it a lot easier to clean the nozzle when printing with sticky filaments like PETG. I have never needed a brass brush to clean the nozzles - if something stick anyway I just heat up the nozzle to a little higher temperature and wipe it with a dry paper towel.
The harder layer also helps avoiding wear and oxidation.

RE: how to clean hot end and nozzle?

@area51

thank you

RE: how to clean hot end and nozzle?

@area51

when change nozzle diameter, do i need to change anything in prusa slicer?

RE: how to clean hot end and nozzle?

@atomleaf

RE: how to clean hot end and nozzle?

@oxygen

thank you.

RE: how to clean hot end and nozzle?

IIRC you can add another printer profile with different nozzle diameters, there is profile for MINI 0.25 and MINI 0.6 nozzle size.

RE: how to clean hot end and nozzle?

@crawlerin

thank you