# Printer looses temps at start

I have a problem with my printer that drives me nuts. Frequently, not always, this is what happens when I print - no matter if from SD or from Octoprint (Hardware: Mendel90, Rumba, Full Graphic LCD, Raspi, Octoprint):

The print starts normally, bed heats up, printhead goes Zero on all axes, Z down again, waits for extruder temp and starts printing. And in this moment, all temperature targets (Extruder + Bed) go to "0". Printer prints but stops extruding after cold extrusion temp is reached. Another print missed.

You see the missing targets in the sreenshot, same is on the display: 210/0, 55/0 or so.

I doubt this is a hardware or host error, as it occurs when printing from SD as well as from Raspberry. I can't remember having this issue when I used Marlin Firmware (which I like much less wrt the display etc.).

Any thoughts on this? It's a PITA and leaves my very frustrated.

Ralf

## Comments

Ralof

G21

M107

M190 S55

M104 S215

G28

G1 Z5 F5000

M109 S215

G90

G92 E0

M82

M204 S9000

G1 Z0.22 F7800

G1 E-1 F1800

G92 E0

G1 X107.309 Y59.583 F7800

G1 E1 F1800

G1 X108.107 Y58.293 E1.07067 F1080

G1 X108.469 Y57.827 E1.09817

G1 X108.995 Y57.212 E1.13589

G1 X109.412 Y56.771 E1.16417

G1 X109.697 Y56.512 E1.18209

G1 X110.554 Y55.792 E1.23426

G1 X111.11 Y55.409 E1.26572

G1 X112.245 Y54.74 E1.32712

G1 X112.684 Y54.539 E1.34959

G1 X113.613 Y54.158 E1.39641

G1 X114.369 Y53.926 E1.43326

G1 X115.604 Y53.648 E1.49222

G1 X116.134 Y53.584 E1.51712

G1 X117.275 Y53.505 E1.57039

G1 X157.578 Y52.591 E3.44883

G1 X172.927 Y52.601 E4.16401

G1 X174.395 Y52.736 E4.2327 F1080

G1 X174.869 Y52.831 E4.25523

G1 X176.385 Y53.245 E4.32847

G1 X176.595 Y53.328 E4.33898

G1 X177.75 Y53.825 E4.39756

G1 X178.222 Y54.088 E4.42272

G1 X179.442 Y54.877 E4.49045

G1 X180.588 Y55.858 E4.56072

G1 X181.023 Y56.321 E4.59032

G1 X181.898 Y57.388 E4.65463

G1 X182.689 Y58.666 E4.72466

G1 X182.989 Y59.29 E4.75692

G1 X183.52 Y60.664 E4.82553

G1 X183.872 Y62.144 E4.89644

G1 X183.95 Y62.757 E4.92523

G1 X184.019 Y63.655 E4.96718

G1 X184.031 Y64.044 E4.98533

G1 X184.021 Y131.413 E8.12443

G1 X183.876 Y132.921 E8.19502

G1 X183.532 Y134.385 E8.26509

G1 X183.295 Y135.059 E8.29837

G1 X182.899 Y136.003 E8.34605

G1 X182.536 Y136.685 E8.3821

G1 X181.797 Y137.839 E8.44592

G1 X180.985 Y138.812 E8.50497

G1 X180.635 Y139.184 E8.52879

G1 X179.52 Y140.151 E8.59755

G1 X178.889 Y140.591 E8.63341

G1 X177.882 Y141.194 E8.68807

G1 X177.318 Y141.46 E8.71714

G1 X176.084 Y141.947 E8.77894

G1 X175.628 Y142.074 E8.80101

G1 X174.605 Y142.314 E8.84996

G1 X173.871 Y142.415 E8.88451

G1 X172.725 Y142.495 E8.93804

G1 X132.422 Y143.409 E10.81647

G1 X116.916 Y143.389 E11.53898

G1 X116.131 Y143.327 E11.57564

G1 X115.4 Y143.227 E11.61005

G1 X113.919 Y142.86 E11.68112

G1 X113.405 Y142.672 E11.70661

G1 X112.115 Y142.105 E11.77229

G1 X111.779 Y141.913 E11.79033

G1 X110.484 Y141.065 E11.86246

G1 X110.29 Y140.906 E11.87414

G1 X109.366 Y140.097 E11.93134

G1 X109.02 Y139.73 E11.95485

G1 X108.207 Y138.758 E12.01391

G1 X107.874 Y138.265 E12.04163

G1 X107.124 Y136.965 E12.11157

G1 X106.473 Y135.312 E12.19436

G1 X106.122 Y133.824 E12.26557

G1 X106.05 Y133.243 E12.29285

G1 X105.979 Y132.325 E12.33577

G1 X105.969 Y131.956 E12.35296

G1 X105.979 Y64.587 E15.49206

G1 X106.127 Y63.06 E15.56353

G1 X106.478 Y61.581 E15.63436

G1 X106.704 Y60.942 E15.66594

G1 X107.011 Y60.201 E15.70332

G1 X107.276 Y59.65 E15.7318

G1 E14.7318 F1800

G92 E0

G1 X137.202 Y118.491 F7800

G1 E1 F1800

G1 X137.202 Y131.947 E1.62699 F756

G1 X137.142 Y132.703 E1.66233

G1 X136.967 Y133.433 E1.6973

G1 X136.68 Y134.126 E1.73226

http://pastebin.com/kaFPadKC

I cut the First print and the end with many waits...

Hope this helps, Ralf

The startup screen says "Version 0.91". Is there any way to see this more details of the firmware e.g. in the Arduino files?

> 15:19:57.134 : T:30.42 B:104.44 B@:255 @:0

> 15:19:57.930 : Echo:M190 S105

> 15:19:57.930 : ok 41358

> 15:19:57.930 : TargetExtr0:235

> 15:19:57.930 : Echo:M104 S235

> 15:19:57.930 : ok 41359

> 15:19:58.039 : ok 41360

< 15:19:58.039 : N106906 M117 ETE 4h 32m 43s *44

> 15:20:53.903 : Echo:G28

> 15:20:53.903 : ok 41361

> 15:20:53.903 : Echo:G1 Z5.00 F5000.00

> 15:20:53.903 : ok 41362

< 15:20:53.903 : N106907 M117 ETE 4h 32m 43s *45

> 15:21:41.873 : TargetExtr0:235

> 15:21:41.873 : Echo:M109 S235

> 15:21:41.888 : TargetExtr0:0

> 15:21:41.888 : TargetExtr1:0

> 15:21:41.982 : ok 41363

> 15:21:41.982 : Echo:G90

> 15:21:41.982 : ok 41364

> 15:21:41.982 : Echo:G92 E0.0000

> 15:21:41.982 : ok 41365

< 15:21:41.982 : N106909 M117 ETE 4h 32m 43s *35

The thing I don't understand is highlighted in bold: Target Extruder 235, then 2 lines on Target Extruder 0. Strange.