Heater error TAZ 6

General LulzBot TAZ
1

I have a TAZ 6 and it has the original Hexagon hot end with the original thermistor and heater. I was given a spool of old Polymaker PolyPlus PLA. It seemed to print a little poorly compared to PolyLite PL:A that I had been using immediately prior.

I decided to print a temperature tower that I have the STL for. I am using CuraLE 4.13.17 and added scripts to manually set the temperature at several layers starting on layer 4.

It prints starting at 230 degrees on layer 4 and then every 40 layers it drops by 5 degrees eventually printing at 190.

Well,I got an error I have never seen before. The printed shut down and sounded a buzzer. It gave an error Heating Failed E1. I tried again and got the same error. As I watched the temperature on the readout as it tried to transition for the 210 used on the thin 3 layer base to the 230 starting at layer 4. The temperature climbed but then seemed to stall at about 215. After a little while the Firmware stopped the print with the error listed above.

I checked the resistance of the thermistor and the heater and they are within spec.

I did a new print with the extruder temp set to 230 for everything. It reached and maintained 230 with no problem The print was fine except it was clearly too hot at 230.

Any advice for what is going on? The scripts function is listed as experimental in Cura, but I used it before about a year ago the exact same way without any errors.

all thoughts are appreciated!

-Tony

2

You’re printing in PLA, so I assume that it’s putting the part cooling fans at full blast after the first 2-3 layers. When it’s that close to the bed, the fans are going to reflect off of it and onto the nozzle a lot more than usual. If it’s already at 230c when the fans kick on like your other prints, it can probably stabilize in time, but climbing from 210 to 230 with reflected part cooling fans at the same time appears to be too much for it.

Delay turning the fans on until layer 10 or so, or put the starting print temperature at 230c.

3

Thanks for your help. It makes sense

Interestingly doing a print at 230 from the start, no manually set M104 S230 instruction at a certain layer number, Just 230 degrees for the entire small print. They worked perfectly other than the fact that the PLA was too hot and all dribbly (as expected)

I will try to use the usual 210 degrees for the fiirst section of the temperature tower and then go to 225 for the second section (at layer 44) I will not use 230 at all because I know it is too hot for this PLA

I will see if a heater error is triggered there