Hotend fan issue.

Anvil

@jay_s_uk how would that even happen?

Anvil

jay_s_uk

@anvil there doesn't appear to be any damage that can be seen
If you remove the SD card and power up the board, does the fan still come on?

Anvil

@jay_s_uk crud sorry I already put everything back together before i saw the sd card thing...

but after inspecting the connectors and making sure polarity is correct and continuity is present for the proper wires to each fan...

put everything back together and it the hotend fan is now observing the thermostatic control....

but still running into the issue of it starting and stopping at the beginning of a print.

would it still be helpful to remove the sd card and power up the board?

jay_s_uk

@anvil in that case post the first 50-100 lines of your gcode

Anvil

@jay_s_uk

;FLAVOR:RepRap
;TIME:26567
;Filament used: 97.598m
;Layer height: 0.5
;MINX:8.32
;MINY:11.374
;MINZ:0.5
;MAXX:323.257
;MAXY:313.949
;MAXZ:196.5
;Generated with Cura_SteamEngine main
T0
M190 S95
M104 S257
M109 S257
M82 ;absolute extrusion mode
G28 ; home all axes
G1 X5 Y10 Z0.2 F3000 ; get ready to prime
G92 E0 ; reset extrusion distance
G1 X160 E25 F600 ; prime nozzle
G1 X180 F5000 ; quick wipe
M83 ;relative extrusion mode
G10
;LAYER_COUNT:393
;LAYER:0
M107
M204 T500
M566 X540 Y540
G0 F12000 X33.244 Y38.514 Z0.5
G0 X26.042 Y51.51
M204 P700
;TYPE:SKIRT
G11
G1 F2700 E0.32429
G1 F1500 X26.208 Y50.643 E0.09371
G1 X26.346 Y50.005 E0.06929
G1 X26.583 Y49.023 E0.10724
G1 X26.742 Y48.469 E0.06118
G1 X27.034 Y47.602 E0.09711
G1 X27.287 Y46.895 E0.07971
G1 X27.453 Y46.486 E0.04686
G1 X27.893 Y45.518 E0.11287
G1 X28.217 Y44.849 E0.07891
G1 X28.412 Y44.484 E0.04393
G1 X28.935 Y43.588 E0.11013
G1 X29.309 Y42.981 E0.07568
G1 X29.554 Y42.617 E0.04658
G1 X30.143 Y41.815 E0.10563
G1 X30.617 Y41.196 E0.08276
G1 X30.893 Y40.866 E0.04567
G1 X31.575 Y40.112 E0.10792
G1 X32.14 Y39.515 E0.08725
G1 X32.492 Y39.176 E0.05188
G1 X33.244 Y38.514 E0.10635
G1 X33.755 Y38.079 E0.07124
G1 X34.018 Y37.869 E0.03573
G1 X34.373 Y37.603 E0.04709
G1 X35.491 Y36.818 E0.14501
G1 X35.848 Y36.588 E0.04508
G1 X36.341 Y36.298 E0.06072
G1 X37.413 Y35.704 E0.1301
G1 X37.714 Y35.549 E0.03594
G1 X37.957 Y35.434 E0.02854
G1 X38.83 Y35.051 E0.1012
G1 X39.457 Y34.789 E0.07214
G1 X39.729 Y34.684 E0.03095
G1 X40.128 Y34.545 E0.04485
G1 X40.82 Y34.326 E0.07705
G1 X41.556 Y34.105 E0.08157
G1 X41.841 Y34.028 E0.03134
G1 X42.256 Y33.931 E0.04524
G1 X43.048 Y33.768 E0.08584
G1 X43.703 Y33.643 E0.07079
G1 X44.016 Y33.593 E0.03365
G1 X44.471 Y33.534 E0.0487
G1 X47.181 Y33.137 E0.29075
G1 X49.818 Y32.674 E0.28421
G1 X52.457 Y32.136 E0.2859
G1 X55.019 Y31.537 E0.2793
G1 X57.624 Y30.847 E0.28606
G1 X60.224 Y30.082 E0.2877
G1 X62.718 Y29.27 E0.27842
G1 X65.282 Y28.353 E0.28906
G1 X67.75 Y27.391 E0.28118
G1 X70.222 Y26.347 E0.28485
G1 X72.647 Y25.241 E0.28293
G1 X75.082 Y24.045 E0.28798
G1 X77.408 Y22.821 E0.27901
G1 X79.765 Y21.493 E0.28718
G1 X82.042 Y20.125 E0.28198
G1 X84.288 Y18.687 E0.2831
G1 X86.513 Y17.172 E0.28574
G1 X89.167 Y15.242 E0.34835
G1 X89.438 Y15.057 E0.03483
G1 X90.336 Y14.486 E0.11296
G1 X90.913 Y14.138 E0.07153
G1 X91.287 Y13.933 E0.04527
G1 X92.302 Y13.427 E0.12039
G1 X92.9 Y13.147 E0.07009
G1 X93.181 Y13.025 E0.03252

Anvil

Ya it seems like m107 in the g code is turning off fan1 for some reason....

man what a frustrating issue....

It was printing flawlessly when I printed a part with a small first layer...

noticed the issue yesterday when i had a part with a large base and i had a jam by layer 2 because of heat creep

jay_s_uk

@anvil did you change M563 to F0?
M107 shouldn't be applied to thermostatic fan

Phaedrux

You can test the thermostatic fan by sending M106 P1 H-1 S1 which should turn it on full. When it's powered on full, move the print head around to bed to see if the fan cuts out. It sounds like a wiring break.

Anvil

@phaedrux your a wizard man. totally a wire in the drag chain... as soon as the hotend moves to the far side of the bed the wire for the fan is bent and when it straightens out in the chain it comes back on. Thanks!