After the first few prints using the supplied Cura profiles, the nozzle has started to clog up either at the start of the print or part way through. The extruder keeps going bending the PTFE tube until stopped. Has anyone have any idea of what is causing this and what are the solutions. I have ordered a Dragon Hotend.
I am getting frustrated with the MIC-6 bed falling and printed off the parts for Johannes Weis's solution before I started having problems with the nozzle. I saw a YouTube video by Kersey Fabrications, which addressed this issue on a Creality Ender 5 by installing different Z axis lead screws with a finer lead(angle of the threads). Has anyone considered this solution ? As I only intend to use one hotend and there are two Z axis motors, would the installation of another stepper driver enable independent Z axis operation ie Marlin G34 operation. I realise this would involve amending Marlin, which is beyond my knowledge at the moment but may be a long term upgrade. It would help level the bed in one direction.
Pulley Upgrade - although I haven't had any problems yet, they don't look that secure. The Pulleys that I purchased for the Z axis synchronisation upgrade are very similar in size to the supplied bearings and washers but with a deeper flange. They have a deeper flange than the suggested flanged bearings. Has anyone used pulleys successfully ?
I bought 2 bi-metal heat breaks for the DSH. They are too long and stick out of the cooling block by about 3 mm but it's been printing for 2 hours so far and it hasn't clogged yet. That's literally the longest time it's ever printed without clogging up.
I didn't tighten it enough so I'll get to peel plastic from the heating block once it is done but that's an easy fix.
I am slightly hopeful I'll finally be able to print something on this hunk of junk.
I also wanted to buy a brass heating block but I couldn't find a good one.
Dragon Hotend and Z axis modification installed, which has solved the problem of heat creap/nozzle clogging and a falling bed. I'm now able to get consecutive prints without any problems. Very worthwhile upgrades.
The original hotend sucks. Replace it asap.
Finer leadscrew should be an easy swap and remove the issue of the falling bed. You should be able to adjust the steps for Z via a simple command so no need to dive too deep into Marlin :)
Asynchronous movement of the Z-motors is doable if you use the output of the second extruder and another driver. Haven’t tried it yet since I wanted to keep my code usable for other proforgers.
Also I don’t think Independent lead screws are that much of an upgrade since they lengthen the leveling time at the start of each print and doesn’t solve anything a Z-Synchro can‘t. I prefer the static solution (at least for two leadscrews).
I tried using regular pulleys but it seems hard to get any with decent quality. Another user suggested two flanged bearings which seems like a really good upgrade.