Printfan error
Hello,
occasionally the print stops with a printfanerror. I can not see anything actually wrong with it. When I resume the print it works normally. I have a MK3S with the newest firmware but the same happened with the last version. How is this error triggered? And how could I set it to be a bit more tolerant?
Thanks.
Kind regards
Best Answer by Neophyl:
The print fan has 3 wires. The third wire is a tacho signal. It feeds back to the einsy so it can read the speed of the fan. If the fan actually stop (obstruction) then it can tell. What sometimes happens though is that movement of the extruder can cause a temporary loss of the signal, either through a dodgy connection at the fan or einsy end or a potential wire fault that only happens in certain positions (which are a right pain in the rear to find).
It could also be other things like a firmware error (if it was that though you would expect it to be a widespread issue), board fault etc. Normally I would just replace the fan and run new wiring back to the board. Which is also a pain to do. The other option is to turn the fan check off via the printers lcd. That lets you print and can be useful if you are printing overnight and you need it not to stop.
"Man who says it cannot be done should not interrupt man doing it" -Confucius
The print fan has 3 wires. The third wire is a tacho signal. It feeds back to the einsy so it can read the speed of the fan. If the fan actually stop (obstruction) then it can tell. What sometimes happens though is that movement of the extruder can cause a temporary loss of the signal, either through a dodgy connection at the fan or einsy end or a potential wire fault that only happens in certain positions (which are a right pain in the rear to find).
It could also be other things like a firmware error (if it was that though you would expect it to be a widespread issue), board fault etc. Normally I would just replace the fan and run new wiring back to the board. Which is also a pain to do. The other option is to turn the fan check off via the printers lcd. That lets you print and can be useful if you are printing overnight and you need it not to stop.
Thanks
Thanks for the answer. I did not have that option on the radar.
I guess if the printfan fails without it being noticed (by turning of the option) then nothing terrible can happen. Anyhow just making it a bit more tolerant would have been nicer.
"Man who says it cannot be done should not interrupt man doing it" -Confucius
Also clean the fan; use a stiffish artist's paintbrush, especially check for fine strands of filament wrapped around the hub as this can cause slow running and trigger errors.
Cheerio,