Maxing out at 305c - ideas thoughts?
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looking at the curve I'd say your either your temperature reading is wrong, or you're actually reaching the limit of what the heater can do with the losses it has.
M308 S1 P"e0temp" Y"thermistor" T500000
got any specs on the thermistor?
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Hi,
Did you try tuning at a reachable temp?
Frederick
Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6
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@fcwilt I can reach 305c so 350c seems reasonable since the thermistor can reach 450c accurately
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@supset said in Maxing out at 305c - ideas thoughts?:
@fcwilt I can reach 305c so 350c seems reasonable since the thermistor can reach 450c accurately
I tune my normal heaters at 190 even though they can reach higher.
So it may be that if you tune at 300 it will work fine at 450.
Frederick
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@fcwilt really, I’ll give it a try,...
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Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6
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@fcwilt ya,...
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@fcwilt it seems like that’s just a runaway setting, not an active or target setting
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@supset said in Maxing out at 305c - ideas thoughts?:
@fcwilt it seems like that’s just a runaway setting, not an active or target setting
True but perhaps it could interfere with tuning?
Frederick
Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6
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@fcwilt you’re suggesting, commenting it out, perhaps yes
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@fcwilt it seems the M143 Command possibly works, I commented it out, and got this, default 285c limit
I put it back and restarted, and the error disappeared
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Hi,
OK so the M143 setting does play a role in the tuning process and your previous value of 445 should not have interfered at all when using the 350 target temp.
Did you get a chance to try 300 when tuning?
I am thinking perhaps that the firmware isn't expecting such high temps like 350 and has tuning issues.
And if you could get it tuned for a lower temp like 300, 310, 320, etc then the heater might work fine for higher temps when it was simply heating.
Frederick
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https://forum.duet3d.com/topic/17972/config-json-update-not-works-configtool-nozzle-temp-limit
It looks like there is a bug in the config tool where M143 isn't being generated for the hotend, which would lead to the default limit being applied.
I've also asked if there is a hard upper limit for setting M143.
