UltiMaker uses functional, analytical and tracking cookies. Tracking cookies enhance your experience on our website and may also collect your personal data outside of Ultimaker websites. If you agree with the use of tracking cookies, click “I agree, continue browsing”. You can withdraw your consent at any time. If you do not consent with the use of tracking cookies, click “Refuse”. You can find more information about cookies on our Privacy and Cookie Policy page.
Does the Ultimaker 3 have a thermal cut off switch/fuse if it overheats?
Posted
· Does the Ultimaker 3 have a thermal cut off switch/fuse if it overheats?
Not... really...
One failure mode is if the temp sensor is reading low such that the printer thinks the nozzle is colder than desired and it starts feeding full power into the heater "forever". Well there is a software check - if the heater is on full blast for N seconds (I think it's 30 seconds) and the temperature doesn't go up by M degrees (I think it's 2 degrees) then it knows something is seriously wrong and shuts down the heaters immediately, and aborts the print.
Also if the temp sensor measures very high temperatures it also cuts off power to head and bed.
Also Ultimaker tried just feeding 24V into the heater "forever" to see what would happen. I'm pretty sure what happens is: not much. I think the teflon inside the head melts out a little bit and needs replacing afterwards. I don't know if anything catches on fire but I wouldn't want anything above the printer within a few inches. Other than the print head, I believe the rest of the printer is unaffected.
If you feed 24V into the bed "forever" it only reaches about 110C. Not hot enough for anything to burn. Even if you raise the ambient temp in your cupboard to 50C the bed will only reach about 135C. Still not hot enough for anything to burn.
If your printer has the CE certification sticker on the back (I think the UM3 does?) then it's *somewhat* safe but there is no guarantee.
The servo drivers also get quite hot and have built in thermo cutoffs - built into the servo driver chip. It only cuts off for a portion of a second and then starts right back up (but your printer loses steps so your print is ruined) but this prevents these chips from getting so hot they would start a fire.
The power brick should also be CE certified and seems to have a computer in it. It has safety features and almost certainly a thermal cutoff. When it cuts off (it's happened to me many times - not sure if it's thermal or current or voltage dip) it stays off until you power cycle it.
I don't represent Ultimaker. I don't work for them. This is all 3rd hand information. I believe it's not 100% safe but it's reasonably safe. But safer if like on a table away from all combustibles, lol.
Cura 5.7 is here and it brings a handy new workflow improvement when using Thingiverse and Cura together, as well as additional capabilities for Method series printers, and a powerful way of sharing print settings using new printer-agnostic project files! Read on to find out about all of these improvements and more.
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.
Recommended Posts
gr5 2,177
Not... really...
One failure mode is if the temp sensor is reading low such that the printer thinks the nozzle is colder than desired and it starts feeding full power into the heater "forever". Well there is a software check - if the heater is on full blast for N seconds (I think it's 30 seconds) and the temperature doesn't go up by M degrees (I think it's 2 degrees) then it knows something is seriously wrong and shuts down the heaters immediately, and aborts the print.
Also if the temp sensor measures very high temperatures it also cuts off power to head and bed.
Also Ultimaker tried just feeding 24V into the heater "forever" to see what would happen. I'm pretty sure what happens is: not much. I think the teflon inside the head melts out a little bit and needs replacing afterwards. I don't know if anything catches on fire but I wouldn't want anything above the printer within a few inches. Other than the print head, I believe the rest of the printer is unaffected.
If you feed 24V into the bed "forever" it only reaches about 110C. Not hot enough for anything to burn. Even if you raise the ambient temp in your cupboard to 50C the bed will only reach about 135C. Still not hot enough for anything to burn.
If your printer has the CE certification sticker on the back (I think the UM3 does?) then it's *somewhat* safe but there is no guarantee.
The servo drivers also get quite hot and have built in thermo cutoffs - built into the servo driver chip. It only cuts off for a portion of a second and then starts right back up (but your printer loses steps so your print is ruined) but this prevents these chips from getting so hot they would start a fire.
The power brick should also be CE certified and seems to have a computer in it. It has safety features and almost certainly a thermal cutoff. When it cuts off (it's happened to me many times - not sure if it's thermal or current or voltage dip) it stays off until you power cycle it.
I don't represent Ultimaker. I don't work for them. This is all 3rd hand information. I believe it's not 100% safe but it's reasonably safe. But safer if like on a table away from all combustibles, lol.
Link to post
Share on other sites