Travis7s

My guess is S5 with aluminum bed and glass frame.

Specifically printing TPU with stock profiles. I get much better quality (less stringing) when I print one at a time but when one part is done the printer will delay for a considerable time while heavily oozing, then it starts printing into the ooze which leads to a very bad print. Is there anything that can be done to prevent this? Here is a video showing the issues:

I also had to run compatibility mode for Windows 8.

The Onyx One started at $3500 and would probably be more comparable to Ultimaker, but is it as reliable/consistent as @P3D says?

Also be careful with CPE+, if you don't apply enough glue it chips very easily. It seems like things that need a high plate temp make it more susceptible. (CPE+ and polycarb default is 107C!)

Tried to update today using the menu and a wired connection but just get the "Checking for Updates" screen indefinitely.

I'm not brave enough to try this update so I think I will wait a bit and see how it pans out.

I've had real trouble with Ultimaker TPU clogging gradually on my UM3. Even with a brand new Printcore and bowden tube that has only seen TPU, I find that after a day or 2 I will get subtle underextrusion. You can't see it by eye but the parts are significantly weaker/squishier. Eventually the nozzle will clog enough that the filament jams back at the feeder A hot and cold pull will fix but only for a day or two. Any tips of preventing this? Side note, I find it annoying that the printcore doesn't preheat when unloading TPU. Half the time its too stuck in the nozzle to break free and the filament grinds and you have to throw away a few feet.

Is there any fix for the Z offset plugin yet? Its very useful for me as I routinely need to make parts that have virtually no elephant foot and manually adjusting the screws back and forth is not ideal...

XY Calibration also failed for me after updating, but I thought it was due to one of the nozzles being loaded with TPU. I tried it twice but haven't really had time to fully look into it.

One odd thing I noticed since upgrading my UM3 is if you use the handwheel to rapidly jog the z axis during manual bed level, it no longer moves smoothy, but starts-stops-starts-stops with every revolution of the wheel.

Brand new printcore seems to work fine so I guess this particular core has lost its ability to regulate the temperature correctly. The stats showed it as being hot for 20 days and printed 550m of filament. What is the typical lifespan of an AA printcore?

So far I have not had any issues losing connection with Cura 4 but I had many problems with it on Cura 3.4/3.6. Very annoying as it often seemed the only way to fix it is power cycle the UM3 and reopen Cura. @gr5 There is a Reset Cura Connect option in the UM3 menu under System or Maintenance. Never really seemed to help me though.

More troubleshooting: realized that it prints fine when I switched to the other nozzle so suspecting the printcore may be getting too hot somehow. I measured the resistance of thermistor and heater but it seems normal compared to the other core, at least at room temperature.

My UM3 is a year old and my prints have suddenly started coming out quite bad. I print with Ultimaker nylon and use a Printdry system, I am pretty certain this is not moisture issues, plus I have tried it with a brand new spool that was just opened. I print with stock profiles and I have done hundreds of these exact parts without issue. I seem to be getting extreme drooping/melting on layers that are not even on overhangs. I suspected some kind of cooling issue but did not notice any debris or anything inhibiting the fan. Cranking the fan speed to 100% drastically helps but does not get everything back to normal. Any ideas on things to look for that may be causing this? I have attached some comparison photos for reference. The far left part is the "control" that i printed a while ago. The middle part is with cooling at 100%. The right part is with stock 40% cooling.