Nozzle constantly clogs,can't seem to find a solution

[jamesban]

Its a longshot but have you tried another slicer? Like downloading cura and use a profile from a website thats already setup for your model and do a print just to see if a setting somewhere in simplify might be causing it? It sounds like you have tried everything possible.

Good evening,
For almost 3 years I have a stock Tevo Tarantula,except for some minor improvements.

Some months ago while printing a 4 hour PETG print my nozzle clogged for the first time ever.
I unclogged it and from that moment till now the nozzle cloggs and I can't get a print finished.
Sometimes it happens at the start,sometimes after 1 hour.
It doesn't always totally clog, but when it does you can hear the extruder clicking and underextrument will appear or it wont print at all.
So what I did:
-Tried another extruder (I have a Titan extruder,tried the stock one)
-Changed nozzles
-Changed PTFE tube
-Changed throat,even got an all metal one
-Changed the fan with a bigger 40mm one,in order to have more airfow
-Updated the firmware,from Marlin 1.1 to 2.0.
-Tried other filaments.Neither PETG,nor PLA can print.
-Even applied thermal paste to the throat and insulated the hotend
-Replaced the hotend block
-Replaced the thermistor and the heating element

I can't find the cause of the clogs and I've replaced everything that the filament goes through.It just doesn't make sense.
I am using Simplify3D and even when just asking the printer to extrude ,the extruder will start clicking.

So any idea what else I can check on,before I get a new one and just throw this one out of the windows?
Thanks.

[sagirokach]

Hello,
I too have the same problem on a prusa clone with PETG.
making me crazy.
I didn't undergo all the tests @dant3 did but I did changed the entire extruder assembly and got few good prints with specific profile I made. since then I changed that profile and I'm back at the beginning.

I'm using prusa slicer if that helps.

If anyone has any suggestions,
thanks in advance,
Sagi.

[Dant3]

Its a longshot but have you tried another slicer? Like downloading cura and use a profile from a website thats already setup for your model and do a print just to see if a setting somewhere in simplify might be causing it? It sounds like you have tried everything possible.

Tried another Slicer,same happens.
I m gonna go ahead and dismantle the whole printer,at least the electronics to make a visual inspection.
Next I m gonna replace the motherboard.
If these dont work,I m gonna sell it and get an Ender 3 V2.