[Pi 0.75.1] Extruder Temperature reported incorrect and extrusion stopped.
- Printer has two extruders. Worked fine with v0.70 (didn't have this problem).
- Pre print - both extruders are generally brought up to temperature in case both are needed.
- Print job sent to printer for single extruder so extruder #2 is turned off and the print starts.
- At some point the extrusion stops from extruder #1. Manually stopped job.
- On the printer, the extruder temp #1 is OK (235°C) - BUT in Repetier host the extruder 1 temp is reported as 60°C (incorrect). extruder 2 temp is curiously ALSO 60°C (and that is correct). Force extruding #1 does not work in Repetier Host but does work from printer control panel.
It seems that Repetier Host is misinterpreting the temp feedback values from the printer and thinking that both extruders are 60°C.
Have replicated problem twice.
Workaround I have at the moment is to manually set extruder #2 to 180°C so that Repetier will still allow extrusion.
- Pre print - both extruders are generally brought up to temperature in case both are needed.
- Print job sent to printer for single extruder so extruder #2 is turned off and the print starts.
- At some point the extrusion stops from extruder #1. Manually stopped job.
- On the printer, the extruder temp #1 is OK (235°C) - BUT in Repetier host the extruder 1 temp is reported as 60°C (incorrect). extruder 2 temp is curiously ALSO 60°C (and that is correct). Force extruding #1 does not work in Repetier Host but does work from printer control panel.
It seems that Repetier Host is misinterpreting the temp feedback values from the printer and thinking that both extruders are 60°C.
Have replicated problem twice.
Workaround I have at the moment is to manually set extruder #2 to 180°C so that Repetier will still allow extrusion.
Comments
FIRMWARE_NAME:Marlin V1; Sprinter/grbl mashup for gen6
FIRMWARE_URL:http://makerstoolworks.com/ PROTOCOL_VERSION:1.0
MACHINE_TYPE:MendelMax 3 EXTRUDER_COUNT:2
UUID:00000000-0000-0000-0000-000000000000
I don't have a copy of when it is bad, but I have seen that the first T:xxx is the same as T1. So that is probably the problem. BUT T0 is correct. It must have been looking at T0 before since I haven't changed the firmware and RHServer worked OK. Can you change it to look at T0 for the T0 temp?
I'm connecting to RepetierServer running on the Pi using a browser that shows the extruder temperatures - I am NOT using Repetier Host. I will try to replicate the problem again but am in the middle of a few print jobs so it may be a day or two. I recall seeing the output when the problem occurred and the first T was showing the same as T1.
Yes - there is some event that is changing the T value being returned from T0 to T1. It feels to me like a return of comms errors - I saw quite a few in the log when the problem occurred. I noted the display on the printer showed ETA/ETE/Layer (which was very nice BTW) but could this extra commands be overloading the comms and causing errors that could possible trigger this T confusion?
I notice that there are quite a few errors with the "Unknown command" after the M117 commands with the ETE and ETA values - I think it is the ":" (colon) character not being accepted by the firmware and then treating the text after that as another command. I don't know if this is causing the problem but it may be good if we could disable that somewhere so we can eliminate that as a cause (AND/OR change the colon character to something else so that it won't give an error).
< 5:10:51.889: N385890 M105
> 5:10:51.890: ok
< 5:10:51.890: N385891 G1 X162.740 Y129.390 E6.0952
> 5:10:51.896: ok
< 5:10:51.897: N385892 G1 X162.740 Y90.610 E7.2560
> 5:10:51.947: ok
< 5:10:51.947: N385893 G1 X122.140 Y90.610 E8.4714
> 5:10:51.949: ok T:230.0 /230.0 B:100.6 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:0
< 5:10:51.949: N385894 G1 X122.140 Y89.490 E8.5049
> 5:10:51.962: ok
< 5:10:51.962: N385895 G1 X163.860 Y89.490 E9.7537
> 5:10:51.966: ok
< 5:10:51.966: N385896 G1 X163.860 Y210.510 E13.3764
> 5:10:51.979: ok
< 5:10:51.979: N385897 G1 X122.140 Y210.510 E14.6252
> 5:10:51.980: ok
< 5:10:51.980: N385898 G1 X122.140 Y209.390 E14.6587
> 5:10:52.634: ok
< 5:10:52.640: N385899 G1 X162.740 Y209.390 E15.8741
> 5:10:52.641: ok
< 5:10:52.641: N385900 G1 X162.740 Y170.610 E17.0349
> 5:10:53.322: ok
< 5:10:53.322: N385901 M105
> 5:10:53.323: ok
< 5:10:53.323: N385902 G1 X163.105 Y169.595 F12000
< 5:10:53.347: N385903 G92 E0
> 5:10:53.457: ok
> 5:10:54.769: ok T:230.1 /230.0 B:100.6 /100.0 T0:230.1 /230.0 T1:62.4 /0.0 @:44 B@:0
< 5:10:54.769: N385904 M105
< 5:10:54.779: N385905 G1 X163.495 Y169.205 E0.0165 F3861
> 5:10:54.805: ok
> 5:10:54.806: ok
< 5:10:54.807: N385906 G1 X163.495 Y168.526 E0.0368
> 5:10:54.810: ok T:230.1 /230.0 B:100.6 /100.0 T0:230.1 /230.0 T1:62.4 /0.0 @:44 B@:0
< 5:10:54.810: N385907 G1 X163.105 Y168.916 E0.0534
> 5:10:56.071: ok
< 5:10:56.072: N385908 M105
> 5:10:56.072: ok
< 5:10:56.073: N385909 G1 X163.105 Y168.238 E0.0737
> 5:10:57.279: ok
< 5:10:57.280: N385910 M105
< 5:10:57.314: N385911 G1 X163.495 Y167.847 E0.0902
> 5:10:58.545: ok
> 5:10:58.551: ok T:230.0 /230.0 B:100.4 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:0
< 5:10:58.551: N385912 M105
> 5:10:58.591: ok T:230.0 /230.0 B:100.4 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:0
< 5:10:58.591: N385913 G1 X163.495 Y167.168 E0.1105
> 5:10:59.856: ok
< 5:10:59.857: N385914 M105
> 5:10:59.860: ok T:230.0 /230.0 B:100.3 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:0
< 5:10:59.861: N385915 G1 X163.105 Y167.559 E0.1271
> 5:11:01.064: ok
< 5:11:01.065: N385916 M105
> 5:11:01.069: ok T:230.0 /230.0 B:100.3 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:0
< 5:11:01.069: N385917 G1 X163.105 Y166.880 E0.1474
> 5:11:02.330: ok
< 5:11:02.330: N385918 M105
> 5:11:02.334: ok T:230.0 /230.0 B:100.2 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:0
< 5:11:02.335: N385919 G1 X163.495 Y166.490 E0.1639
> 5:11:02.366: ok
< 5:11:02.367: N385920 G1 X163.495 Y165.811 E0.1842
> 5:11:02.371: ok T:230.0 /230.0 B:100.2 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:0
< 5:11:02.371: N385921 G1 X163.105 Y166.201 E0.2008
> 5:11:03.670: ok
< 5:11:03.676: N385922 M105
> 5:11:03.677: ok
< 5:11:03.677: N385923 G1 X163.105 Y165.522 E0.2211
> 5:11:07.438: ok
< 5:11:07.438: N385924 M105
< 5:11:07.450: N385925 M105
> 5:11:08.746: ok T:230.0 /230.0 B:99.6 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:127
< 5:11:08.746: N385926 M105
> 5:11:08.783: ok T:230.0 /230.0 B:99.6 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:127
< 5:11:08.783: N385927 G1 X163.495 Y165.132 E0.2376
> 5:11:08.790: ok T:230.0 /230.0 B:99.6 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:127
> 5:11:08.792: ok T:230.0 /230.0 B:99.6 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:45 B@:127
< 5:11:08.792: N385928 G1 X163.495 Y164.453 E0.2579
> 5:11:08.793: echo:Active Extruder: 1
> 5:11:08.794: ok
< 5:11:08.794: N385929 G1 X163.105 Y164.843 E0.2745
> 5:11:08.795: Error:No Line Number with checksum, Last Line: 385926
> 5:11:08.803: Error:Line Number is not Last Line Number+1, Last Line: 385926
< 5:11:08.912: Resend: N385927 G1 X163.495 Y165.132 E0.2376
> 5:11:08.912: Resend: 385927
> 5:11:08.913: ok
< 5:11:08.913: Resend: N385928 G1 X163.495 Y164.453 E0.2579
> 5:11:08.937: ok
< 5:11:08.937: Resend: N385929 G1 X163.105 Y164.843 E0.2745
> 5:11:08.938: ok
< 5:11:08.938: N385930 G1 X163.105 Y164.165 E0.2948
> 5:11:10.039: echo: cold extrusion prevented
> 5:11:10.043: ok
< 5:11:10.043: N385931 M105
> 5:11:10.043: ok
< 5:11:10.044: N385932 G1 X163.495 Y163.774 E0.3113
> 5:11:11.247: echo: cold extrusion prevented
> 5:11:11.251: ok
< 5:11:11.251: N385933 M105
< 5:11:11.336: N385934 G1 X163.495 Y163.095 E0.3316
> 5:11:11.374: echo: cold extrusion prevented
> 5:11:11.379: echo: cold extrusion prevented
> 5:11:11.383: ok
> 5:11:11.388: ok T:62.4 /0.0 B:99.4 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:0 B@:127
< 5:11:11.388: N385935 G1 X163.105 Y163.486 E0.3481
> 5:11:11.391: echo: cold extrusion prevented
> 5:11:11.396: ok T:62.4 /0.0 B:99.4 /100.0 T0:230.0 /230.0 T1:62.4 /0.0 @:0 B@:127
< 5:11:11.396: N385936 G1 X163.105 Y162.807 E0.3685
> 5:11:11.399: ok
< 5:11:11.399: N385937 G1 X163.495 Y162.417 E0.3850
> 5:11:11.400: echo: cold extrusion prevented
> 5:11:11.403: echo: cold extrusion prevented
It seems there must be a "T1" being received by the printer randomly. That then causes a "Active Extruder:1" in the log and "cold extrusion prevented" then follows on every subsequent G1 line.
I have managed to resume printing by sending a T0 command during printing but the lines that were missed in the interim are obviously missed.
It would be good if Repetier Server had a setting that would automatically send a "T0" command if an undesired "Active Extruder:1" appeared in the log - that would then prevent this false tool change and "cold extrusion prevented" warning.
Regarding the automatic T0 switch back I suggested - I am suggesting that it be an OPTION somewhere in the print settings. In this way the workaround can be turned on/off by the user as necessary - only if they require it.
When I really do need to use two extruders and I get this problem - I do not know what to do. At the moment I am forced not to use Repetier Server - rather I am using an SD card direct into the printer LCD display to print. :-( I hope I can use Repetier Server again but at the moment it is now broken for me.
I will look into updated firmware - but I am not sure if there is a version released for my printer yet (MendelMax 3). Do you have anyone using Repetier firmware on a MendelMax 3 (with a GLCD display)? The main board in a MendelMax 3 is a Rambo.