TABLE OF CONTENTS


Internal Hotend PTFE Tube (old K1/ old K1 Max)

The length of the PTFE-tube connecting the extruder assembly to the heatsink should be approximately 2.3cm. Make sure the ends have as flat and smooth cut as possible to avoid filament getting caught when feeding. Make sure it is not too long as to avoid having the extruder balancing ontop of the PTFE-tube. The internal diameter for the teflon tube should be preferably 2mm and outer diameter 4mm. 


Motion system (replacing bearing for example)

K1/ K1 Max motion systems sometimes can require replacement due to for example printhead bearing damages. But after dissassembly we noticed Creality on current revisions of the K1/ K1 Max assembled the motion system using epoxy in certain points making it near impossible to replace anything on it without replacing the entire motion system + toolhead assembly. 

EDIT: This seems to no longer be the case with newer revisions.


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Hotend attachment to toolhead

When a hotend needs replacement but the long hotend screws facing up going through the heatsink are damaged/ stripped this can be problematic. This is because although there are other screws holding the heatsink to the printhead assembly, those hotend screws also pass through the heatsink and into threads in the printhead assembly. There is no other way to remove the hotend + heatsink without damage, the long hotend screws have to be loosened. 


We however have managed to successfully remove stripped screws using a heatgun to heat up the screw and surrounding metal to expand, and some glue to attach the screwdriver to the screwhead. Recommended to have 2 people doing this, one holding the hotgun.

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How to check what version of hotend and heatsink your K1 Max uses:

Please check the serial number on your K1 and K1 Max. If it ends with 23, the nozzle will not. If it ends with 24, the nozzle will fit.



Freezing phenomenon

K1 / K1 Max sometimes freeze as was noticed after repairs involving detaching and reattaching the large 2x2 toolhead board connector. This could be due to the fact there is nothing stopping it from being inserted incorrectly (for example rotated 90 degrees) due to the design of the connector.


Symptoms are:

- Screen lighting up on boot with the Creality logo animated, but will never reach the menu 

- dead silent, no beep or fans on


Troubleshooting by turning off for long periods of time, re-inserting the extruder board connector, and turning the machine off and on eventually revived both machines to their normal state without firmware or new parts required.