Today in Modified my often clogging SV08 Max hot end, Installed a Creality K2 Plus unicorn hot end.
Was not a super easy mod as it requires drilling, tapping, soldering and patience, but seems to be working quite well.
Not sure if it needs to be done, the SV08 max hot end is quite good in my opinion, but getting parts for this printer is a bummer. Creality parts are overnight.
I have a few items on to print, we shall see what needs adjusting.
First part looks good for no tuning other than pid tuning after hot end replacement.
looks like z offset is a bit high.
Hot end should be far more efficient with the induction heater wrapped around the heating block rather than placed on one side.
Well done! I actually scrounged up a croudsourced CAD model for the K2 with the intention of designing a custom heatsink for the Zero. I never got it done.
If you do a paper test how high is the eddy sensor off the bed? Might need a copper washer (or 2) between the heater and the heatsink OR figure out how to raise the eddy a touch.
I did not do a paper test, the installed height of the K2+ unicorn nozzle is nearly identical to the to the SV08 max hot end. Only had to set the Z offset .01mm closer and looks great.
Now you can go to 350c with the hotend. I have enough parts to try this. Never thought about it but wanted the ability to go over 300c. Well done.
Is the Unicorn hot end capable of 350c?
If it is, that’s cool too.
Here is a PDF I made for sharing this mod.
Sovol SV08 Max unicorn mod.pdf (1.1 MB)
Well done and good job
Thx for sharing
Yes I have a K2 plus and run PPS-CF10 in it at 330c. I have a Cartographer sitting right in front of the nozzle as well without any problems.
Also why not use the Creality thermistor? You should be able to change it in the config and run it. The SV08 is running klipper so it will recognize it and run without any problem.
The thermistor on the K2+ shows and Ohm reading around 10K at room temperature, the Sovol thermistor has an Ohm reading around 1K.
I didn’t think they would be compatible and I didn’t try.
This is and open-source machine, there may be a way to tell the machine 10k is room temperature, but I am fairly new to 3D printing, and what I don’t know is a lot!
If you know how to do it, I would appreciate your input.
Dave
While software CAN utilize the 10K thermistor the pullup resistor is soldered to the toolhead board.
A 10k thermistor with Sovol’s 11.5K pullup has POOR resolution above 250 °C.
With the Sovol’s toolhead the PT1000 is a FAR better chioce.
Good to know. What would you need to modify to use the PT1000 with the SOVOL?
Just splice the wiring together and modify the config file?
The Zero and the Max ship with a PT1000 installed. Sovol has it defined as [my_thermistor] but if you plot the points it is exactly a PT1000 with a small offset. I assume the offset is to account for the sensor being further from the heater than the “melt zone”.
Got it. No need for additional changes!
For anyone still digging into configs and hotend behavior, I bookmarked a handy reference while researching the SV08 Unicorn setup—it helped me sanity-check a few assumptions before changing anything.
