@dc42
the problem has been solved. - at least for me.
I had the same issue today:
It has been caused by wiring. I have seen that 1-2 of the 4 cables have been a little unloosen and the cable diameter had been reduced. This is why the motor hadn't had enough voltage and this caused the problem.
Check your wiring guys 
Hi there,
I am using a volcano copper plated colvano heater and a copper plated volcano nozzle with a 30W heater on a smart effector. Everything from e3d and duet3d.
I found a similiar issue in another topic, where people should increase their dead time.
I also found this solution in the troubleshooting too: https://duet3d.dozuki.com/Wiki/Tuning_the_heater_temperature_control
Coming to my issue:
After assembling everything and running a PID auto tuning, my printer already seemed to have heating problems above 260°C. So it was not able to set a auto tuning max temperature of about 280°C - only faults. My printer set a dead time of 5.5.
When I now want to start heating the nozzle to 200°C for example, my printer receives the following error message:
"Error: Heating fault on heater 1, temperature rising much more slowly than the expected 1.4°C/sec"
I changed the dead timer to 20 and 30 seconds. I deleted my override.config to ensure heating would go up again. It worked, but the temperature is now exceeding the targeted temperature:
"Error: Heating fault on heater 1, temperature excursion exceeded 15.0°C"
Do I need to run another auto tune and change the dead time within the override.config?
Or how could I solve this problem? I have checked wires and connections to exclude other issues.
With my normal volcano heater I never had this problem before.
Many thanks in advance
Reckham
@dc42
the problem has been solved. - at least for me.
I had the same issue today:
It has been caused by wiring. I have seen that 1-2 of the 4 cables have been a little unloosen and the cable diameter had been reduced. This is why the motor hadn't had enough voltage and this caused the problem.
Check your wiring guys
Hey there,
I would like to add a 3rd printing fan to my tool 0.
Currently I am running it with 2 like the following:
M563 P0 D0 H1 F0:2 ; Define tool 0
How can I add the third one to F1?
I tried F0:F1:F2, F0 F1, F2, etc. with no success. Any ideas?
Thanks in advance 
Hi @dc42,
fixed! The problem was, that Tool 0 manually had to be chosen.
It does not automatically use the tool 0 or 1, even though there is only 1 tool active.
This might be a nice suggestion from me as a hotfix for the next software update.
Would be awesome if you could implement this.
Thank you very very much for your help!
Regards
Reckham
Hi @dc42,
Thanks for the quick answer!
So you mean "M563 P0 F0:1"?
I will try that later Thanks so far!
Is there anything in the slicer configs what need to be added for the "P0" too?
Have a nice evening
Regards
Reckham
Hi there,
I have a little G-Code question. Maybe anyone could help me:
I have mounted a second printing fan and I do NOT want to connect them in series or parallel and my pins are like the following:
heatpipe cooling fan is pinned on a always on fan.
the 2 printing fans are pinned to fan 0 and 1. (duet location)
I tried the following: "M563 P0 F1;" because I would like to use my F1 with Fan 0 in combination. I have also found some tool definitions with "M563 P0 D0 H1" and tried to make different changes, but the fans are are not running synchron.
Could anyone tell me the correct G-Code for my .config?
Thanks in advance
Fixed. Thank you very much!
Have a nice day
I tested them seperately, yes.
G91 and then seperately.
Z does not react. But if i swap the connector from the z motor to the y motor (cables on board stay), then the y axis does not react.
I also tested moving my z to P4 (second extruder spot on board). Same problem.
Might this be a board problem? Or is the problem still anywhere else?
@dc42 Hi,
Thank you for the quick response!
I tested both ways. But the motors are working fine. I already tested them seperately.