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Clicking / Clogging - advice?  

Active Member
Clicking / Clogging - advice?

I'm a new MINI+ user but a happy owner of a few others including a MK3.

I've noticed I have to follow a weird process to get my mini+ ready to print without clicking and clogs. 

I have to do the following ...

  • From Cold start with Filament (PLA) installed. 
  • Turn the printer on and preheat to PLA, then waitSet Temp of Nozzle to 250/260 C, wait for oozePurge, Purge, purge till I get a flow
  • Print like a happy maker for however long I want with no clicks, clacks or clogs until my printer cools and I go to sleep
  • Then I restart the process again from COLD start

If I don't do this Preheat and Purge from a cold start, I'm guaranteed Clicking and no filament flow or worse. 

I've checked the head, heatblock, switched PTFE, set temps to be +5 or +10 degrees in my slicing and more but this doesn't do anything.. except for the above process.Maybe I'm just jaded by my MK3 and ON, START/PRINT functionality.. 

Is this just me? Can anyone offer advice for a new MINI+ user? 



Posted : 22/09/2021 8:16 am
Illustrious Member
RE: Suggestion

Try these:

If these do not work, consider the Bondtech heartbreak.  

Chuck H
3D Printer Review Blog...
Posted : 22/09/2021 9:44 am
Active Member
Topic starter answered:
RE: cheers

Thanks CW.. I've been through pretty much most of that with either Prusa Support, KBs or Youtube.. 

everything except the coldpull - which I don't think I need to do after going through the Heatbreak PTFE switch.. and observing the nice clean state of the insides. 

yes. I've been looking at a Bondtech Heatbreak and also a dual drive but I want to try and get the most out of what I paid for first.

That's like buying a car only to find out that the Engine is useless and needs to be replaced the second you get it off the lot. 


This post was modified 4 weeks ago by Mattflow
Posted : 22/09/2021 10:35 am
Reputable Member

If you only print PLA, at least so far, then clogs indicate that your hotend is not assembled properly. And because you already used temperatures above 250°C, PTFE tube inside heatbreak probably shrunk.. which again, causes additional clogs. So... check hotend, clean it, check PTFE tube length inside heatbreak and replace if necessary. After that, it's just a matter of adjusting extruder filament tension properly.

As cwbullet mentioned.. if you plan to use temperatures above 240°C (PETG, etc) then I recommend Bondtech heatbreak as well.

Mini+ with Bondtech upgrade & modified firmware...
Posted : 22/09/2021 11:35 am
Eminent Member
Re: Clicking / Clogging - advice?

I think this might be my issue when I posted before about having a ruined PTFE between extruder and hotend. I'm going to pull the PTFE that was included and investigate further.

Posted : 22/09/2021 9:22 pm