If you are experiencing a clogged extruder during a print job and need help, then please have a look at this solution article. This article will focus on the hardware.
 If you wish to receive a Gcode from the Leapfrog Support Team to test your device with, then please open a ticket.


If you are experiencing print quality issues related to a clogged extruder then please follow the steps below:


Step 1. The Filament spool
Make sure the spool is able to rotate without to much friction. Eventough the PTFE tubes are usually low friction, some filaments can generate a high amount of grip, and the printhead is not capable to pull and extrude filament properly. 
Even a tight bend in the PTFE (between 3rd party filament box and printhead) can make the filament heavy to pull, for the printhead. 

 

How to check if it’s ok? 
Remove the PTFE tube from the printhead, and try to pull it a little bit, manually as a test. Heavy-to-pull? something is wrong, Easy-to-pull? Then all seems ok!


2. The filament pressure thumbscrew
Make sure your filament pressure thumbscrew is set to the right amount. The 3D printable gauge (Support / Bolt PRO / 3D Models) can be used to set the right amount. 

guideline

3mm = Engineering PLA

3mm = ABS

3mm = HIPS

3mm = PETG              

3mm = Carbon  

3mm = Nylon                 

6mm = TPU / Flex

6mm = PP                 

6mm= PVA / Scaffold    



 
3. Printhead and hot end
In this step two things are checked at once. Is the inner printhead AND hot end free of any obstructions / filament dirt remainings?

This can easily be checked by going to the maintenance menu and loading PLA thru this printhead to sort of ‘clean’ it out. A steady flow is crucial. In case of doubt u could go to maintenance mode, heat both extruders up, manually feed them both to compare the easy of extrusion. 


4. Temperature to high in build-chamber
Some filaments can become soft in the temperature range of 50℃ - 80℃. Therefore if the room temperature is within this range, you have a risk of deforming your filament before it enters your hot end. In some cases this may happen at the extruder drive gear / filament pressure mechanism since force is applied on the filament. 
You can either experiment by lowering the build chamber temperature or reducing the filament pressure thumbscrew with increments of 1mm.  

5. Your filament absorbed to much moisture
Different filaments absorb moisture at different rates. But the signs that your filament has absorbed moisture are fairly common.
- Popping/cracking sounds when extruding

- Severly reduced part strength and layer adhesion

- Uneven extrusion lines

- Uncharacteristically severe stringing, blobbing or oozing

- Uncharacteristically textured or "fuzzy" surfaces on prints

If you’re seeing any of the above symptoms, then you could consider to dry out your filament.  Especially hygroscopic materials like nylon, PETG, PVA, and flexibles, symptoms may appear after just one night left out in the open.  Dry out wet filament as soon as you identify it to preserve print strength and quality. Please consult the correct drying conditions on the support page for Filaments.