all duex heaters shorted...
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@jens55 I disconnected everything except the ribbon and power.
any heater I configure goes full throttle as soon as I give power
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Based on that, I would say that the issue is firmware related and not hardware related. I am not very good with config files but you could post your config.g and somebody who knows their stuff might be able to see something that isn't right.
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Is it all heaters or only the configured heater?
What happens when the ribbon is disconnected as well? If it's a heater mosfet that has failed closed circuit it would enable the heaters automatically.
If it's only your configured heater than perhaps the configuration is not correct. Perhaps the pin has been inverted so that it's on by default.
Please post your config.
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@phaedrux said in all duex heaters shorted...:
Is it all heaters or only the configured heater?
What happens when the ribbon is disconnected as well? If it's a heater mosfet that has failed closed circuit it would enable the heaters automatically.
If it's only your configured heater than perhaps the configuration is not correct. Perhaps the pin has been inverted so that it's on by default.
Please post your config.
I checked with a multimeter and all heaters are shorted (at the same time). I thought it was just the one configured because it's the only one that lights the LED. I tried all the heaters anyway and they all behave the same except the 2 on the duet
I'm pretty sure it's not the config because as soon as I set the heater to one on the duet2 (not the duex) everything works and the only thing that changes is the heater name. I'll try to disconnect the ribbon and also post the config just in case
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@matt3o, I am not sure if I am looking at the right schematic but what I am seeing is that the LED is connected directly to the output pin. If the output is switched low then the LED will light up. That seems at odds with the report of only one light lighting up.
Could you explain how you measure the fact that the output is shorted? -
this is all very weird and erratic.
so first time it happened I checked the heaters with a multimeter and all of them were shorted (I just check resistance @jens55 ).
I tried to disconnect the ribbon cable as @Phaedrux suggested and everything's fine, of course the duet doesn't com with the duex but the heaters are all open (off).
I reconnected the ribbon (with printer off of course) and now the heaters are all open (off) except for the one that is configured that goes in full blast as soon as I give power. In fact the heater LED turns on right away.
If I set the heater to any one on the duet2 everything works as expected.
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@matt3o, I don't know what else to suggest. From my end it sounds as if the board is fine and the issue is in the config file but as you say, it works if configured to run the heaters on the Duet.
Sorry .... -
@jens55 thanks for your help anyway, really appreciated it. I'll do some more testing but I'm out of ideas
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@matt3o what happens if you take the sd card out of the Duet, then power it all up? That way you know the config is not doing anything.
Are the outputs shorted when you don't power on the Duet & Duex? I wonder if the resistance measurement is interfering with things...
Also, what happens if you actually connect a heater to each of the outputs? Do they get hot or does the board blow fuse? Guessing it will already be blowing the fuse if it's actually shorted on the board. -
Please post your config.
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@phaedrux sure thing
; -------------------------------------------------- ; General preferences ; -------------------------------------------------- G90 ; send absolute coordinates... M83 ; ...but relative extruder moves M550 P"Agony" ; set printer name M552 S1 ; enable network M586 P0 S1 ; enable HTTP M586 P1 S0 ; disable FTP M586 P2 S0 ; disable Telnet ; -------------------------------------------------- ; Drives ; -------------------------------------------------- M569 P2 S1 ; X1 (Z stepper) M569 P1 S0 ; X2 (Y stepper) M569 P0 S0 ; Y1 (X stepper) M569 P3 S1 ; Y2 (E0 stepper) M569 P4 S1 ; Z1 (E1 stepper) M569 P5 S1 ; Z2 (E2 stepper DEX) M569 P6 S1 ; Z3 (E3 stepper DEX) M569 P7 S1 ; Extruder1 (E4 stepper DEX) M584 X2:1 Y0:3 Z4:5:6 E7 ; set drive mapping M906 X1300 Y1300 Z1300 E500 I40 ; set motor currents (mA) and motor idle factor in per cent M350 X16 Y16 Z16 E16 I1 ; configure microstepping with interpolation M92 X160.00 Y160.00 Z1600.00 E698 ; set steps per mm M84 S30 ; Set idle timeout M566 X900.00 Y900.00 Z60.00 E120.00 ; set maximum instantaneous speed changes (mm/min) M203 X30000.00 Y30000.00 Z600.00 E7200.00 ; set maximum speeds (mm/min) M201 X6000.00 Y6000.00 Z20.00 E600.00 ; set accelerations (mm/s^2) ; -------------------------------------------------- ; Axis Limits ; -------------------------------------------------- M208 X0 Y0 Z0 S1 ; set axis minima M208 X380 Y385 Z350 S0 ; set axis maxima ; Leadscrews position M671 X368.5:-21.5:173.5 Y341.85:341.85:1.85 S20 ; Endstops M574 X2 S1 P"xstop" ; configure active-high endstop for high end on X via pin xstop M574 Y1 S1 P"ystop" ; configure active-high endstop for low end on Y via pin ystop M574 Z1 S2 ; configure Z-probe endstop for low end on Z ; Z-Probe M558 P5 C"^zstop" H5 F120 T6000 A3 ; set Z probe type to switch and the dive height + speeds G31 P500 X-5.85 Y33 Z3.85 ; set Z probe trigger value, offset and trigger height M557 X20:370 Y20:370 S50 ; define mesh grid ; -------------------------------------------------- ; Heaters ; -------------------------------------------------- M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp M950 H0 C"bedheat" T0 Q10 ; create bed heater output on bedheat and map it to sensor 0 M307 H0 B0 R0.724 C695.9 D3.76 S0.80 ; auto-tune M140 H0 ; map heated bed to heater 0 M143 H0 S120 ; set temperature limit for heater 0 to 120C M308 S1 P"e4temp" Y"thermistor" T500000 B4723 C1.19622e-7 ; configure sensor 1 as thermistor on pin e0temp M950 H1 C"e0heat" T1 ; create nozzle heater output on e0heat and map it to sensor 1 M307 H1 B0 R2.573 C190.5:106.0 D4.28 S1.00 ; auto-tune M143 H1 S350 ; set temperature limit ; -------------------------------------------------- ; Fans ; -------------------------------------------------- M950 F0 C"duex.fan3" Q500 ; create fan 0 on pin fan0 and set its frequency M106 P0 S0 H-1 ; set fan 0 value. Thermostatic control is turned off M950 F1 C"duex.fan4" Q500 ; create fan 1 on pin fan1 and set its frequency M106 P1 S1 H1 T45 ; set fan 1 value. Thermostatic control is turned on ; -------------------------------------------------- ; Tools ; -------------------------------------------------- M563 P0 S"Mosquito" D0 H1 F0 ; define tool 0 G10 P0 X0 Y0 Z0 ; set tool 0 axis offsets G10 P0 R0 S0 ; set initial tool 0 active and standby temperatures to 0C ; -------------------------------------------------- ; Closing ; -------------------------------------------------- M593 F48 ; input shaper T0 ; select toolit's configured with the heater on the duet2, all I have to do to make it fail is to use any duex heater name like (duex.e2heat)
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https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Pin_names_for_Duet_2_WiFi_Ethernet
Notice how the Duex heater pins are inverted in the listing.
exp.heater3, exp.8, !duex.e2heat, !duex.pwm1 exp.heater4, exp.13, !duex.e3heat, !duex.pwm2 exp.heater5, exp.18, !duex.e4heat, !duex.pwm3 exp.heater6, exp.23, !duex.e5heat, !duex.pwm4 exp.heater7, exp.31, !duex.e6heat, !duex.pwm5So try using: !duex.e2heat
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@phaedrux said in all duex heaters shorted...:
https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_Pin_names_for_Duet_2_WiFi_Ethernet
Notice how the Duex heater pins are inverted in the listing.
exp.heater3, exp.8, !duex.e2heat, !duex.pwm1 exp.heater4, exp.13, !duex.e3heat, !duex.pwm2 exp.heater5, exp.18, !duex.e4heat, !duex.pwm3 exp.heater6, exp.23, !duex.e5heat, !duex.pwm4 exp.heater7, exp.31, !duex.e6heat, !duex.pwm5So try using: !duex.e2heat
You mean to say duex.e2heat (no bang) ?
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I'm lost, it's inverted so it should not have the " ! ", right?
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@matt3o, that is my interpretation .... but then I am no expert on config.g .....
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Example: !fan2 This means the pin labelled FAN2 on the Duet, but with the drive signal inverted. -
@matt3o said in all duex heaters shorted...:
I'm lost, it's inverted so it should not have the " ! ", right?
Some of the Duex signals are pre-inverted by the connection to the Duex, so to use the pin names, you need to add the ! to invert them again.
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@Phaedrux okay, the behavior was too erratic, I took the time to re-wire everything. On both the duet and duex. What drove me off is that all heaters were shorted when this started happening.
I use CAT6 wires for all not power hungry connections. I realized that they are convenient but also not easy to peel and crimp. They are just one stiff strand of wire. When you peel or crimp they tend to weaken in one tiny spot and break. Everything seems fine at the beginning but they eventually fail if damaged.
Now I've been very careful when peeling and I loosened the crimping tool so it applies less force.
I believe that was the problem. Everything seems to be working now. BTW, it works without the
!in the heater name. That part is a bit confusing in the doc... well at least for a total noob like me.Thanks everybody for the help... I hope this is fixed...
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Let us know how it goes.
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I think I got the heater naming....
exp.heater3 is an alias on !duex.e2heat (note the
!). So to invert it you either use!exp.heater3with an!orduex.e2heatwithout it. At least this is my interpretation...
