I did change the “Tool Heads (TH)” on the Workhorse to the correct one.
I would recommend calling support then
These printers don’t sense their toolhead, you select it in CuraLE in the “add printer” dialog, and on the toolhead menu on the printer.
I called support and they said try updating Lulzbot Cura. I updated Cura to the latest stable version. Added new machine. Did firmware update. Connected to machine. It didn’t report a different toolhead. Repeated M306T then M500. I still have 1.75mm values in where it’s supposed to be 2.85?
Any other ideas?
It’s never going to say wrong toolhead.
The machine nor windows has any way of knowing what toolhead is installed.
Yeah lol, I meant the warning that it detects a different toolhead.
It doesn’t detect a toolhead. There’s no toolhead detector.
At best it might be able to detect that there’s different firmware on the machine than you’re trying to load.
You may have been asked and answered this already, but can you provide a picture of the actual toolhead installed?
So, just to be clear, when you add the machine in Cura LulzBot Edition 4.13.10, it should be selected as Taz Workhorse(+) with Meteor 2.85
After doing that, updating firmware should be putting firmware 2.1.3.0.29
I just checked the latest Marlin code for the firmware, and it indeed does NOT have different values for the 2.85 vs 1.75 Galaxy-series toolheads:
So it will be necessary to put in the command to use the 2.85mm filament heat capacity. It might get changed when you select the toolhead from the toolhead menu, but I can’t check that right now.
I named the toolhead “NEW” because I added a new toolhead in settings. My profiles from the old toolhead were kept when I uninstalled the old Cura.
I did all the steps to update that you mentioned.
What command do I need to run to use 2.85mm filament?
I tried all the diffrent toolheads in the menu and ran M503. All had the same result for 1.75mm heat capacity.
Would you consider this a bug that needs reported?
The command to set your heat capacity would be
M306 H0.0149
Then re-run autotune
M306 T
I created a bug report, as the default filament heat capacity for all of the Meteor toolheads is for 1.75mm filament. Since no machine comes with the MET175 as standard, this should not be the default.
The toolhead menu also does not change the filament heat capacity as it would be expected.
You may want to clear out your cura configuration files in C:\Users*username*\AppData\Roaming. Just wipe out the Cura folders in there. It should be impossible to see any 1.75mm filament. It’s actually filtered so only filament with a set diameter of 2.85mm will show up.
If you make filament and input 1.75mm into the diameter, you get a warning, and then it will disappear from view:
I think it worked! Thanks!
<<< [15:56:18] echo: M306 E0 P50.00 C14.76 R0.1397 A0.0592 F0.1842 H0.0149
Hopefully that takes care of the other heater failed issues, but it still seems like that small of a change wouldn’t be enough to cause a thermal error.
Firmware defaults are
M306 A0.0622 C15.44 F0.1844 P50 R0.1128 H0.0056
Your results are
M306 A0.0592 C14.76 F0.1842 P50 R0.1397 H0.0149
It prints better and temperature readings appear more accurate. Unfortunately there still seems to be a heating problem.
I did not adjust the temperature at all! When speeding up after the first layer there is a large temperature drop of about 10c. Mid print: Huge temperature spike, no change in speed!
That looks like the thermistor is giving a bad reading. Loose connection, partially broken wire, or the thermistor itself may be moving inside the cartridge.
It has been several weeks since my last post. The Taz WH seems to be holding steady.
I haven’t had any thermal runaways (loss of heat). And I have printed about a total of 12 hours after the fix (MPC H0.0149).
I still notice some difficulties with heating up, but only while cruising at ~210c and then climbing. (210c initial layer temperature). It sometimes takes 2 minutes to steadily cruise at 217c. Which is my default for PRO PLA.
I don’t notice as much of a problem printing at higher temperatures but that might be because I don’t print that often with other materials unlike PRO PLA.
I guess time will tell when this machine will reveal its problem. Anyway, thanks guys for the help and support! Happy printing! 
My next project a 1.8m wingspan 3D printed FPV aircraft!
Check out Eclipson! They now print planes in vase mode to make it easier to print!
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