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yes, you can get interference between the wiring for the fan and the thermocouple wires, particularly when the fan wires are being pulsed to produce slower speeds.
Try to keep the wires for the fan as far away from the wires that go from the thermocouple to the little amplifier board on top of the print head, and see if that helps.
See also this current thread, which is basically about the same thing (but to the point where it actually causes the printer to freak out and shut off because it thinks things are getting too hot):
S-Line Firmware 8.3.0 was released Nov. 20th on the "Latest" firmware branch.
(Sorry, was out of office when this released)
This update is for...
All UltiMaker S series
New features
Temperature status. During print preparation, the temperatures of the print cores and build plate will be shown on the display. This gives a better indication of the progress and remaining wait time. Save log files in paused state. It is now possible to save the printer's log files to USB if the currently active print job is paused. Previously, the Dump logs to USB option was only enabled if the printer was in idle state. Confirm print removal via Digital Factory. If the printer is connected to the Digital Factory, it is now possible to confirm the removal of a previous print job via the Digital Factory interface. This is useful in situations where the build plate is clear, but the operator forgot to select Confirm removal on the printer’s display. Visit this page for more information about this feature.
A year after the merger of Ultimaker and MakerBotQQ, we have unlocked the ability for users of our Method series printers to slice files using UltiMaker Cura. As of this release, users can find profiles for our Method and Method XL printers, as well as material profiles for ABS-R, ABS-CF, and RapidRinse. Meaning it’s now possible to use either Cura or the existing cloud-slicing software CloudPrint when printing with these printers or materials
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illuminarti 18
yes, you can get interference between the wiring for the fan and the thermocouple wires, particularly when the fan wires are being pulsed to produce slower speeds.
Try to keep the wires for the fan as far away from the wires that go from the thermocouple to the little amplifier board on top of the print head, and see if that helps.
See also this current thread, which is basically about the same thing (but to the point where it actually causes the printer to freak out and shut off because it thinks things are getting too hot):
http://umforum.ultimaker.com/index.php?/topic/5254-ultimaker-1-maxtemp-triggered-by-cooling-fan/
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