I’ve thrown a TON of money at it to date and it’s just endless issues, one after another.
So far I’ve tried a couple of different beds but the plate under the bed is so wonky it’s ridiculous so I’m back to the stock glass bed, I have replaced the hot end and put on a whole new direct drive extruder (BIQU H2), I’ve updated Marlin a couple of times (at first because the stock firmware had issues with Octoprint) and now also switched to Klipper. I’m on the 4th mount setup for the new extruder, the last one literally snapped when the machine lost Z and pulled itself through some already printed material and snapped off the whole fan assembly and then also proceeded to spew out so much filament below appropriate layer height that it took me a full day of disassembly and cleaning to get all of the filament off of the nozzle, heater block, etc. I’ve also replaced the CR Touch which failed. I’ve switched over to hardened steel nozzles as well.
Now I’ve built a brand new mount from scratch and was having heat break issues, that I think I resolved last night (sizzling and popping and bubbles in the filament, same filament prints perfectly on the printer beside it)… and today’s issue was that it’s constantly crashing Klipper or failing 3 layers into a print when the fans kick on. Got that resolved this morning – the fans were not pointing properly and cooling down the nozzle really quickly which Klipper didn’t like. Seems like I got that resolved by adjusting the fans and putting the boot back on (I had forgot to do that after the last round of fixes).
So just now as I tried to fire up another temp tower to test … it just started completely ignoring the CR touch when doing a G28 and started ramming the bed. Again, seems like yet another CR touch might be wonky.
Ghost in the machine? I was concerned it was user error but this is not my first rodeo … I’ve built many from scratch and all of my other similar gear is totally fine, even stuff I’ve done crazy builds and hacks on (printers, CNC machines, etc). At this point I’m pretty sure that getting anything from Creality in terms of warranty is going to be mostly impossible … I’ve gone over it top to bottom to make sure it’s all tight, connected correctly, belts are properly tensioned, nothing is slipping, no issues on the Z screw stuff … but it still just can’t run reliably.
It seems like it might be time to pull the plug on this thing and call it a loss and move along. My Prusa mini clone prints like a champ. Aside from the usual issues that will happen with them (replacing PTFE tube). The printer is only a couple of months old. It printed ok for a few weeks (after the initial Marlin upgrade that is) and then started this massive string of failures as soon as I tried to start printing with a larger nozzle. Again, the mini clone is totally fine with whatever nozzle sizes I throw at it, the issues are not slicer related, it’s always mechanical or firmware or whatever.
Thanks for listening to me rant. My Ender 3 max is going to sit in a corner for a week and be ignored while I move along to using things that actually work for me. It’s annoying though as I made all of this investment to have a machine with a large print volume that could handle a good range of filaments … and ended up with a make-work project that just sucks time and money and still can’t get a proper print off the bed…