Blowing thru Hotends

[TheRyanRanch]

Is anyone out there going thru Hotends every couple of months? for some reason I am getting constant print failures on an early V4 machine, I bought a second machine and had not had any problems with it. I do print a lot (like 24-7) the only thing that fixes the clogged prints is replacing the Hotend, I also print a lot of Esun PETG, but like I mentioned the newer second printer I ordered seems to just keep going !

any suggestions ?

[insta]

I go through nozzles pretty frequently... They're really easy to replace over the hotend. I build up a batch of six or so then blowtorch them all at once to remove any organics.

Give us some details -- print speeds and temps are important here.

[PcS]

Is it just the nozzles that are going bad from wear ? Or are you getting clogs and then tossing the whole hotels ? I switched to the V4 shortly after its launch and am still running all three hot ends from a year or two ago. I very rarely get clogs and when I do it is easy to remedy and go back to printing.Nozzles do wear out. The metal nozzle last longer than brass and have so far been as reliable for me.

[TheRyanRanch]

Is it just the nozzles that are going bad from wear ? Or are you getting clogs and then tossing the whole hotels ? I switched to the V4 shortly after its launch and am still running all three hot ends from a year or two ago. I very rarely get clogs and when I do it is easy to remedy and go back to printing.Nozzles do wear out. The metal nozzle last longer than brass and have so far been as reliable for me.

where do I find the 0.35 Metal nozzles, sounds promising

[TheRyanRanch]

I go through nozzles pretty frequently... They're really easy to replace over the hotend. I build up a batch of six or so then blowtorch them all at once to remove any organics.

Give us some details -- print speeds and temps are important here.

what I mean is they become clogged (I think) it happens around the first 10 min or so with printing ESun PETG, I have this set at 260c HPB at 80c and running speed of 70/mms.
I have cleaned the nozzles using a Propane Torch to burn out all the junk, but not sure how to clean out the Hotend portion of the assembly? not sure if I can use the same method or not.

The fastest solution is to just buy a new Hotend assembly and keep printing, I do print quite a bit with these machines, and am very impressed on how well they hold up.

most of my material these days is Esun PETG and PLA.

[insta]

The nozzle comes off easily with a 14mm & 11mm wrench, after you've loosened the clamp holding the entire hotend into the holder. Re-tighten the clamp, run some eSUN cleaner filament through the now giant orifice at-temp, loosen the clamp, reattach the now-blowtorched nozzle, and resume printing.

Go at half the speed you're at for PETG.

[Jules]

I would guess the filament drive screw tension isn't set correctly on one of the printers. It's not clogging, it's stripping out the filament. (Did you look at the ends for stripping when it stopped?)

70 mm/sec seems a bit fast for shoving PETG, it needs time to melt, and if the tension isn't just right, jamming and stripping is easy. I'd try slowing down the speed a bit, and check the tension.

[TheRyanRanch]

I would guess the filament drive screw tension isn't set correctly on one of the printers. It's not clogging, it's stripping out the filament. (Did you look at the ends for stripping when it stopped?)

70 mm/sec seems a bit fast for shoving PETG, it needs time to melt, and if the tension isn't just right, jamming and stripping is easy. I'd try slowing down the speed a bit, and check the tension.

Ok, I'll slowwwwww er down, maybe in the 50's range?

I should cutback on the coffee .....

[Jules]

50 mm/sec is good. (i print PETG at 53 mm/sec) But do check the filament drive screw tension too, it might be a "dubble-pronged-problem", as we say here in the south. (Be sure to think that with a sloooow drawl.)

[Tim]

most of my material these days is Esun PETG and PLA.

I found jamming to be much more common when I was switching between PETg and PLA frequently, on the same nozzle. Using cleaning filament (such as eSUN's) helps a lot to prevent that.