Layer adhesion / nozzle jam issue
Hello, I have been testing out my new MK3 and all prints other the ones that came with the printer on the SD card have a strange layer issue.
I have only been using Prusa edition of Slic3r. I only used Prusa filament (several different colors) and tome it looks like an under extrusion/Z axis problem.
I suspect that this might possibly be a nozzle problem. in my 20 hours of printing I have hade two severve hot end jams.
Occatonally I have some loud "cliking" from the extruder and the filament makes a jerking movement, is this normal ?
The files on the supplied SD card print perfectly and I have attached a benchy picture of that.
I am attaching a few pictures of the bad prints and I hope anyone can point me in the right direction.
Edit : I have retensioned my belts so they I can confirm that they are within specs.
Re: Layer adhesion / nozzle jam issue
The "clicking" is the extruder motor skipping steps.... which shows up as under extrusion in your photos.
You also mentioned you have had 2 jams.... try turning the extruder temp up in 5 degree increments
Anything can be made better
https://www.myminifactory.com/users/Joe%20Prints
Re: Layer adhesion / nozzle jam issue
Ohhh, forgot to mention that I have tried to increase nozzle temp up to 215 and then 220 degrees without luck.
How can I deal with the step skipping issue ?
Edit : read about the skipping issue . . .
Re: Layer adhesion / nozzle jam issue
Skipping steps means the temp is too low (or printing faster than the filament can melt), the running current is too low, you have a jam in the hotend, or the extruder is working too hard to turn the spool.
I would run some filament through at... say....255 or some cleaning filament if available. It sounds like your hotend is still partially jammed, but I'm no expert.
IF the supplied SD card files print fine then I would assume it is your slicer.... maybe the extrusion multiplier is too high?
Also- I have read on other forums that on some assembled MK3's the Bontech idler shaft was not properly seated in the bore... resulting in poor/ inconsistent extrusion.... which is also possible on a kit without proper visual inspection during assembly. The shaft is tapered on one side- the side that is inserted in the bore to allow easier installation.
Anything can be made better
https://www.myminifactory.com/users/Joe%20Prints