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Plastic comes out at the top

My left nozzle got clogged, so I changed my right nozzle to the left to continue printing. But after changing the plastic comes out at the top (see picture). How is this possible and how can I resolve this?


1 person has this problem

My guess:
The brass nozzle needs to be tight up against the end of the threaded barrel so that it seals.
If the threaded barrel is a little too high into the heater block, the nozzle will stop before it seals against the end of barrel. That's allowing plastic to leak into the threads.


hm normally that place on top is welded, I think it is busted.. you probably need a new extruder

1 person likes this

I have had this issue, simply screwing the nozzle back in was ineffective. The face where the nozzle back met the thermal block had an orange powered which I assumed was locktight but trying to get the right amount in there and still screw the nozzle back in the full way was problematic. Due to the seal being broken, as others have said it is most likely to require a new head.

In these extruder heads the top is not welded. I still got a new hotend from them though.

I would think it has to do with screwing the nozzle all the way back. If this is not the case then I really do not know how to replace a nozzle.


We have the exact same issue after changing the nozzle from 0.35 to 0.5. Could someone advise how to solve this issue?

I am not sure it helps but I would do as follows:

Take the entire hotend off. Then screw the heatelement+heatsink+temperature sensor all the way up. After that, screw your nozzle on until it is really tight. Then screw the heatelement etc back down until it is tight to the nozzle.




Will try , thanks Marcel

We will try to fix this issue with heat resistant silicone that hardens when dried,will report the results in a few days

Hi Luka,

I currently am having this issue and wonder how your test with the heat resistant silicone went?



Hi David It worked out really well, we had some heat resistant black silicone, and stopped the problem. Check the temperature on the back and I would recommend ordering a spare one because this is only temporary solution

Hi Luka,

Thanks for the reply. Unfortunately I am having a lot more problems with my printer than just leaking plastic, I have attached a photo of the right hand hot end.

I sadly have a total of 8 open tickets registered into Leapfrog Tech Support and maybe likely raising another about a new-ish issue.  A number of the issues are moderate but several a quite serious and as such I do not have a printer that works reliably or consistently any longer.  This is a huge frustration to me as I am unable to use to support my intended business activities, especially with a non-functional printer.  More so it is the consistent lack of reliability that cannot seem to be 'permanently rectified.

Though I will be sure to let you know how I go resolving this in the future.

Kind regards,


(1.05 MB)


I have been having issues with this printer since I got it.  It is an HS and has never consistently worked correctly.  I have 2 other printers and some good experience - although not an expert by any means.

I have yet to get 3 consistent prints to finish - let alone get the quality or speed correct.  Since I got the machine I have had to replace - the warped bed, the main board, the nozzles twice and new hot ends.  My hot ends looked like your picture and I have to say that the new ones they sent me seem to be different and they are working a bit better for the last 2 prints anyway.  I am assuming that is because of the new hot ends and the new firmware upgrades.

I do see a difference after installing the new firmware and other updates just released.

I have my fingers crossed.

I am a bit frustrated about them drooping simplify 3d for Materialise and wanting to charge us for the software change....

1 person likes this

Dear KEN petschauer ,

If you would upload the factory file of a print you want to make so I could have a look at the settings you are using so I can adjust them and see if I can`t help you get the quality you want.

I also attached a gcode I printed today and you can agree it is not a simple looking model and you can also see pictures of the results I got.

Could you also give it a try and send me pictures of the print?

(9.84 MB)
Mircea Thanks for the offer but I have been through this with some of your colleagues many times. The major issue now seems to be the cooling issue in the stepper motors causing jamming. Discussing this in another thread and awaiting a fix from your engineers. Thanks
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User Manual

Quick Start Guide

Installation clips
The following 3 clips will guide you through the installation process of your CreatrXL. By following these, you will be printing within 30 minutes. First start with unpacking the printer. Clickhere to see how you correctly pick up the printer

Part 1 of 3: Unpacking your CreatrXL

In this clip, you will be guided through the unpacking of a brand new CreatrXL. The unboxing along with the location of tie wraps which need to be removed are shown, as well as the process of a connecting the cables to the printer and computer.

Part 2 of 3: Software and configuration

In this clip, we will show you how to install the required software. The first step is to download and install the Arduino software to make it possible for your computer to connect with the printer. The next step is to download and install the Repetier Host Leapfrog software or that controlls your 3D printer. We have tried to make this as simple as possible and also provided direct downloading links per operating system.

If you are using the new Simplify 3D software you can follow all the steps except for the Repetier-Host Leapfrog installation and using explanation. Simply download the software via the purchase link and before first use a pop-up will appear showing you the Simplify 3D Quick start guide. You can also download the Quick start guide or access it from the software via help –> Quick start guide. The quick start guide will briefly explain the functions of the software so that you can start your first print.

Please select you operating system and follow the descriptions in the movie.

Operating systemWindows

The first step is to download and install the Arduino software to make it possible for your computer to connect with the printer. The next step is to download and install the newest version of the Repetier Host Leapfrog software as shown in the clip. This software allows you to convert your 3D software file [STL for example] to a printable file [G-Code] and allows you to control your printer. The Repetier Host Leapfrog software contains standard CreatrXL Print Profiles. Just select the extruder, the filament material as well as the color and Repetier will automatically select the ideal print temperature providing you the best print quality possible. There is also a Leapfrog support button implemented in the software. A Mac version will be available soon.

If you have followed the installation procedure, but you can’t control your Leapfrog CreatrXL and the “6 commands waiting” message in Repetier-Host Leapfrog won’t disappear, you have to install the 2.8.28 drivers. Please see Solution can’t connect 6 commands waiting in Repetier-Host Leapfrog how to do so.

For a more thorough description of Slic3s settings please check this guide!

Windows 8
To install the Arduino drivers on a computer with Windows 8 follow these steps after downloading the Arduino software.

- Save unsaved work and write the instructions down
[your computer will reboot into startup options screen]
- Press the Windows Key and the ‘R’ key simultaneously
- Copy the command inside the brackets
–>[ shutdown.exe /r /o /f /t 00 ] – Select ‘Troubleshoot’
- Select ‘Advanced options’
- Select ‘Startup Settings’
- Select ‘Disable Driver Signature Enforcement’
- Install driver as usual via device manager


In this clip, we will explain you how you can generate a STL file using Sketchup. We show you what to download and how to export your design in STL.

Part 3 of 3: Making your first print!

In this final clip, the process of creating your first print will be explained. This starts with removing the callibration print that is already on the print bed. How to insert the filament and operate the Repetier Host Leapfrog software is also shown, which should culminate in your first 3D Print on the CreatrXL!

Google sketchupHow to export STL files from Sketchup

The first step is to download and install the Arduino software to make it possible for your computer to connect with the printer. You will then need to in stall this driver for OSX to recognize the hardware.

The next step is to download the Repetier software as shown in the clip. This software allows you to convert your 3D software file [STL for example] to a printable file [G-Code] and allows you to control your printer. We have developed standard print profiles for the CreatrXL. Please follow the instructions below to install the print profiles for Mac [not yet included in the video]:

- Download This file
- Go to your Home Folder on Mac and select “Go to Folder” from the Go Menu en type “Library/Application Support/Slic3r/” - Unzip the file you just downloaded and dump the contents in the Slic3r folder, it will replace your existing settings. If you want to keep your current settings as well, take the contents from each folder and put this in the same folder in the Home/Libaray/App../Slic3r folder.

Download instructions by Deepak Dinesh Mehta For a more thorough description of Slic3s settings please check this guide!

Troubleshooting Trees

Filament Guide

  • Extrude at ~ 225o C.
  • Requires heated bed.
  • Works reasonably well without cooling.
  • Adheres best to polyimide tape.
  • Filament tolerances are usually tighter.
  • Prone to cracking, delamination, and wraping.
  • More flexible.
  • Can be bonded using adhesives or solvents(Acetone or MEK).
  • Fumes are unpleasent in enclosed areas.
  • Oil Based.
  • Extrude at ~ 180-225o C.
  • Benefits from heated bed.
  • Benefits greatly from cooling while printing.
  • Adheres well to a variety of surfaces.
  • Finer feature detail possible on a well calibrated machine.
  • Prone to curling of corners and overhangs.
  • More brittle.
  • Can be bonded using adhesives.
  • More pleasant smell when extruded.
  • Plant Based.

Demo Print Downloads

Drivers Downloads

Software Downloads

Firmware Downloads

Please request a firmware download via the Ticket System

Creatr XL Video Library