PID autocalibration fails in SnapMaker 2.0 (A-350)

Snapmaker 2.0
1

Hi.

I want to calibrate step by step my SnapMaker 2.0 (A-350) to improve the printing quality. Now I have seen that many people suggest to run a PID autocalibration.

But I am stuck cause I get “Thermal runaway errors” after starting the PID autocal.

Any Idea or should I skip the “PID Tuning” step?

Thanks,
Rainer

SM Firmware: latest with vers. 1.10.1
Command Line using Octoprint / over USB conn.

Steps I have done to start PID:

M106 (Start FAN 100% of Extruder)

Send: M106
Recv: ok
[…]
Send: M303 E0 S205 C8 (Start Calibration of E0 (should be Extruder); Testcycles = C8 (8 times), Prefered HotEnd Temp 205C (S205)

RESULT & ERROR MESSAGE:

Recv: PID Autotune start
Recv: new E target temp: 0
Recv: new B target temp: 0
Recv: new E target temp: 0
[…]
Recv: Error:Heating failed, system stopped! Heater_ID: 0
Recv: thermal run away of hotend! temp: 27.30 / 0
Changing monitoring state from “Operational” to “Error: Heating failed, system stopped! Heater_ID: 0 - thermal run away of hotend! temp: 27.30 / 0”
Send: M112
Send: N3 M11234
Send: N4 M104 T0 S037
Send: N5 M140 S0*96
Changing monitoring state from “Error: Heating failed, system stopped! Heater_ID: 0 - thermal run away of hotend! temp: 27.30 / 0” to “Offline (Error: Heating failed, system stopped! Heater_ID: 0 - thermal run away of hotend! temp: 27.30 / 0)”
Connection closed, closing down monitor

My System Config (not tuned exept of e-steps already tuned) is:

M503:

Send: M503
Recv: G21 ; (mm)
Recv:
Recv: M200 D3.00
Recv: M200 D0
Recv: M92 X400.00 Y400.00 Z400.00 E237.67
Recv: M203 X150.00 Y150.00 Z50.00 E25.00
Recv: M201 X3000.00 Y3000.00 Z100.00 E10000.00
Recv: M204 P1000.00 R1000.00 T1000.00
Recv: M205 B20000.00 S0.00 T0.00 J0.02
Recv: M206 X-19.00 Y-10.00 Z0.00
Recv: M420 S0 Z0.00
Recv: G29 W I0 J0 Z5.84500
Recv: G29 W I1 J0 Z5.98625
Recv: G29 W I2 J0 Z6.13125
Recv: G29 W I3 J0 Z6.21625
Recv: G29 W I0 J1 Z6.01750
Recv: G29 W I1 J1 Z6.16250
Recv: G29 W I2 J1 Z6.26250
Recv: G29 W I3 J1 Z6.26500
Recv: G29 W I0 J2 Z6.16000
Recv: G29 W I1 J2 Z6.21375
Recv: G29 W I2 J2 Z6.24000
Recv: G29 W I3 J2 Z6.26250
Recv: G29 W I0 J3 Z6.24750
Recv: G29 W I1 J3 Z6.22000
Recv: G29 W I2 J3 Z6.27625
Recv: G29 W I3 J3 Z6.39000
Recv: M301 P13.00 I0.10 D17.00
Recv: M851 Z1.00
Recv: M900 K0.22
Recv: M603 L0.00 U60.00
Recv: ok

2

Hi Rainer,

Did you manage to resolve this? My A350 arrived this week and I’m having the same issue. I can’t run the pod tuning without it quickly getting a thermal runaway error.

The temp variance is also quite high on the prints so I feel it’s needs to be tuned.

Martin

4

Hi Martin.

Not yet until now. But after calibrating my snapmaker as suggested here in this forum I think this workes for me as I currently need.

At the moment I have used my A350 heavily without any issues and I as a newby to 3D printing could complete many projects with PLA, PETG and TPU filament. No issue at all after doing the initial calibration as suggested here.

But no update on this PID issues I have found out.

BR
Rainer

5

But I have to add, that I have worked into CURA as my prefered sliceing tool. LUBAN is years behind in development and feature flexibility compared to Cura or any other popular slicer software.

Until now I have never used LUBAN as my 3D printing slicer again…

BR
Rainer

6

I have just tested this on firmware v1.14.1_20211207.
Looks like the bug is still there.
How do I raise a ticket on this?

Send: M303 E0 S200 U1
Recv: PID Autotune start
Recv: new E target temp: 0
Recv: new B target temp: 0
Recv: new E target temp: 0
[…]
Recv: Error:Heating failed, system stopped! Heater_ID: 0
Recv: thermal run away of hotend! temp: 26.10 / 0
Changing monitoring state from “Operational” to “Error”
Send: M112
Send: N2 M11235
Send: N3 M104 T0 S034
Send: N4 M140 S0*97
Changing monitoring state from “Error” to “Offline after error”
Connection closed, closing down monitor