PID problems
-
@phaedrux yes external mosfet
-
@phaedrux I'm running pid tune now on the bed. The bed with a IR gun is 10C higher then what the thermistor is showing
-
-
Yes, just looked up what I purchased and they are 3950. So , do I put B3950 ?
-
@blitzreg said in PID problems:
So , do I put B3950 ?
Yes.
M308 S0 P"bedtemp" Y"thermistor" T100000 B3950 -
-
@phaedrux right now the thermistor in phase 3 reads 84 and the IR gun shows 96. Makes me wonder if the thermistor is bad
-
Where is the thermistor positioned to get the reading?
Are you measuring with the IR temp gun in the same location?
-
@phaedrux no, I actually testing it all 4 corners and in the middle where the thermistor is located
-
@phaedrux Almost 1 hour on phase 3. My other hypercube has already tuned using firm ware 1.21. now I'm wondering when I tell the extruder to heat to 220C its actually 220C. My first prints off them looked like they got pretty hot. I am using the e3d hemeria w/volcano direct drive. I also have their REVO
-
For the hotend you have a known thermistor and the correct values from E3D, so it should be as accurate as you can expect.
As for the bed, at 24v it takes a long time to heat up and it does many cycles, so it can take quite a while. Rather than tuning to 90c, try a more reachable temp like 60.
-
@phaedrux Hi, the problem was the thermistor in the bed. I swapped it out and now the temps are almost the same between the panel and the IR Gun. Now the gremlin has move to the extruder. I have a REVO Hermera direct drive and it keeps getting heater faults. I have ver 3.4.0 and ran M303 T0 S240 and it tunes fine. But I noticed the the temp rises above the print temperature I set and keeps going until there is a heater fault.
-
-
@phaedrux Why is it saying Heater 0 when the fault happens on heater 1 the extruder? Not sure what is happening here!
-
@blitzreg said in PID problems:
@phaedrux Why is it saying Heater 0 when the fault happens on heater 1 the extruder? Not sure what is happening here!
I think that is a bug in the displayed heater. Please update to 3.4.1 RC1
https://github.com/Duet3D/RepRapFirmware/releases/tag/3.4.1rc1
What did your tuned values result in?
If the part cooling fan doesn't have a big impact on the heater, you can tune the hotend as a normal heater with M303 H1 S240 and see if it behaves better.
