Hi,
I am trying all the forums discussing about K1-max to find a solution to my problem:
I am using a filament that needs to be printed at low temperature (110C maximum). Previously I did prints with a Creality CR2020 by using “M302 S80” in the start gcode . Now, I cannot print the filament because the printer starts working at 180C, not lower temp.
I have rooted my printer and can use Fluidd for any modification but I don’t find where to add the’“min_extrude_temp: 70” line and not sure of its syntax.
Please, help me. This important, for professional use. 
What filament are you trying to print?
This is Zetamix Al2O3 filament, old formulation is given to be printed 110C. I think new formulation is 140C. This product cost a lot, that’s why I want to use it.
links:
I use it to build very small, high temperature furnaces to study physics of materials.
cheers
That is some amazing stuff! Took me a bit but you are actually looking at 23.5%± scale loss? Must be a fair bit of a challenge to design!
I’ll have to admit, converting HV10 to GPa 19 isn’t very straightforward…if you could share an insight…
Back to your issue: This is slicer dependent but the field is in the Materials section, you can pick any, but TPU is the starting point, and edit the parameters from there.
The manufacturer has all the stats in the datasheets.
Hope it helps, Cheers!
Na ! Low temp limitation is coming from the firmware ! For any undefined security reason, all commercial fff printers have a limit on their extruder. Until nozzle temperature doesn’t reach 170C or 180C (depending which printer firmware), printer won’t want to make its job. If you determine a filament with a working point lower than 170C/180C your printer sends an error message. And with the previous printers, it was easy to add a line in the start G-code to force printer working low temp. It was M302 S80 to be able to print from 80C. This specific G-code is no more existing on the new firmware based on klipper… I am becoming crazy with this stupid problem because a big part of my work is pending for a solution.
… And I have ask some help from Creality support people … And I am still waiting for their professional answer … And I finally decided to try all kind of creality K1 forums …
In your printer.cfg file, the extruder temp can be set:
#min_extrude_temp: 170
The minimum temperature (in Celsius) at which extruder move
commands may be issued. The default is 170 Celsius.
#min_temp:
max_temp:The maximum range of valid temperatures (in Celsius) that the
heater must remain within. This controls a safety feature
implemented in the micro-controller code - should the measured
temperature ever fall outside this range then the micro-controller
will go into a shutdown state. This check can help detect some
heater and sensor hardware failures. Set this range just wide
enough so that reasonable temperatures do not result in an error.
These parameters must be provided
In addition:
#max_power: 1.0
The maximum power (expressed as a value from 0.0 to 1.0) that the
heater_pin may be set to. The value 1.0 allows the pin to be set
fully enabled for extended periods, while a value of 0.5 would
allow the pin to be enabled for no more than half the time. This
setting may be used to limit the total power output (over extended
periods) to the heater. The default is 1.0.
Any help there?
Hi, I need time at work to try it. Too much work actually. I’ll keep you informed with all needed details.