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Measurements of PTFE liner in extruder downtube.

Hi guys,

I while back I acquired a used Creatr dual extruder printer that I have been fighting jamming issues for some time.  After a lot of troubleshooting, I discovered that the stainless extruder tubes are supposed to have PTFE liners inside.  Mine are missing.  I have opened a support ticket, but they have not been any help at all.  They refuse to sell me the liners, nor will they give me the measurements so I can source my own.  They just direct me to spend $100 USD for new hot ends.  $100 bucks for 15 cents worth of parts?!  I have to say, so far my experience with Leapfrog has been frustratingly negative.  Both with their support, and the quality of their printers.

Does anyone know the measurement of the liners, or can take a moment to measure theirs?

Thanks in advance!

The Teflon tube has an ID of about 2mm and the OD is about 3mm (measured about 3.12mm)

I cant say for sure of the length but it's not very long.On mine it was only a few millimeters long and just at the top. Held in place by the hollow set screw.

However, that may not be the main problem. 

I was having what I thought was a jamming problem, but it turned out that the actual root cause was that the teeth on the hob gear were worn.

If the machine is used that is something to check.


The gear looks to be in perfect shape, and still grabs the filament tight enough that the stepper will give up before the gear begins to slip.

I found that interesting on the teflon liner.  I was expecting it to go quite far down into the extruder tube.  I also don't have a set screw to hold one in place.  I believe what is happening is the heat from the hot end is slowly working up the tube and softening up the filment before it gets a chance to get near the nozzle, thus jamming it up.  I was hoping the teflon liner would help resolve that, but now I'm wondering if its just poor design.  My Creatr is an early model, with hand cut aluminum rather than laser cut, and the Z axis uses threaded rod rather than ball screw.  Maybe I can figure out a way to sink the heat away from the top of the extruder tube.   Either that or just scrap these extruders and find ones that work from another printer.

Thanks for the info!  Back to the drawing board.


My gear looked fine until I put it under a microscope :-) I was having issues with the print stopping after an hour or so. Problem stopped as soon as I replaced it (this happened to be yesterday).

I believe I heard that the very early versions didn't have the Teflon tube. That may be the case for yours.

Perhaps the extruder fans aren't getting up to full speed? I've had to replace mine before.

You might want to double check that the hob gear is aligned so that the filament has a straight shot into the top of the hot end.

Just an update.  I have since retrofitted the open source J-Head Mk 5 hot end into my Creatr.  It turned a useless printer into a functional one on the first try!  WORKS GREAT!

Now I have a lot of other work and modifications to transform this sloppy heap into some that can print decent quality.

I've looked at that hotend also. How difficult was it to install?


It takes some warranty breaking modifications, and its longer than the original, so you lose a little printing area.

I removed the original hotend mount's set screw and drilled my hot end mount out to 12mm.  I then milled the flange on the top of the J Head off so it just has a 12mm shaft.  Its plastic, so it can be done with a file.  It should then fit snug up in the mount.  Just reinstall the set screw, and its mounted!

J heads generally come with a 12v heater, so I also had to drill out the new nozzle to fit the old 24v cartridge.  I don't remember the size, but it isn't much.

There is an excess of space between the top of the J head and the extruder gear, so a new mount should really be designed so it sits higher.  But what I explained works surprisingly well!  I have yet to have a single jam since the swap.  My next step is to print a 40mm fan shroud that cools the nozzle.

Remember to adjust your Z axis sensor down since the nozzle sits significantly lower.

Thanks for the info. Doesn't sound too bad. I'm out of warranty now anyway.



Hello, I just got the entire PTFE tube out and it measures about 17mm. Inner diameter of 2mm and outer diameter of 3mm seem to be correct. Regards, Marcel
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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