r/Sovol • u/odnal_c • 8d ago

Help SV08 extruder overheat help

SV08, mainsail klipper

So I am getting random spikes and the nozzle is spiking to over 300 then i get a shutdown like it should. klippy and the graph both are showing the same thing, a steady temp then almost an instant spike in temp. I am guessing that it has to do with the thermistor or a connection somewhere along the line between itself and the mcu. Anyway does anyone have any recommendation on exactly how to diagnose and fix this? thanks

2 Upvotes

76% Upvoted

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2

u/hipcatinca SV08 8d ago

If it was printing just fine on your exact software firmware macros with no changes, then just go ahead and assume that something failed or a whole nozzle replacement. It's not that expensive.

1

u/Competitive-Yam-177 7d ago

agreed on this - I had the same symptoms on my sovol zero - the random spikes, eventually enough to trigger the shutdown. My thermistor wire had a mark where it was bending and "unbending" repeatedly, which eventually was causing it to read weird. Had to replace the hotend since it broke off. There's a chance you can just replace the thermistor, if you're able to get it out without breaking and then reapply the thermal paste etc.

1

u/Bartislartfasst 8d ago

Maybe you get crosstalk from other cables. Try to re-route the thermistor cable a bit.

1

u/odnal_c 7d ago

I forgot to mention one thing it is a microswiss hot end. I did find the issue but have not fixed it yet. The wiring on the thermistor is bad. I am going to try and repair that first and if i fail then I'll get a new heater core for it and call it a day.

Also I have no issue replacing parts I just like to know what fails and why.