Printer will not extrude after putting it in the enclosure.
I recently put my newly build printer into the enclosure that and now the extruder is not extruding, like it will do the purge line sometimes. but when it comes to the print itself is the fact that it will not extrude anything. it will extrude when doing a filament change. do you guys have any suggestions?
RE: Printer will not extrude after putting it in the enclosure.
if you are using PLA, and the temperature inside the enclosure rises above say 20C, you are likely to get heat creep inside the extruder cold end heatsink / heatbreak. which will clog the extruder
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Printer will not extrude after putting it in the enclosure.
So, I should print at a lower temp then, right?
I was printing one of the test prints that came with the SD card, I was trying the 3D Benchy, with Regular Cold White filament from Esun. and yes, it was PLA.
Can you explain a bit why heat creep causes a clog or should I look up a YouTube video?
Thank you!
RE: Printer will not extrude after putting it in the enclosure.
Hi Lacky,
below, is a cross section of an e3D V6 Hot end like the one specified for your Mk3 series printer, on the left you can see the important zones
At normal room temperature, the left hand fan on your printer draws in cool air and blows it through the heatsink, keeping the filament (Plastic Wire) cool as it passes through the PTFE tube and the top part of the heatbreak, inside the heat sink, Cool the narrow section of heatbreak between the heater block of the hot end, and the heatsink of the cold zone, is intended to prevent heat trnsfer into the indicated critical zone of the cold end.
when you put a printer into an enclosure, you trap the warmer air from the heat bed/build plate and the nozzle within the enclosure this causes the temperature to rise inside the enclosure. the left hand fan still draws air in and blows it across the heatsink, however this air is now warmer, due to the heating effect of the heatbed/build plate and hot end on the printer, with the result that the coolinf effect becomes less efficient. however the heat transferred from the hot end through the narrow section of the heat break, into the heatsink adds to the warming effect within the enclosure, and over a period of time, the heat sink, which is supposed to be cold, actually becomes warm.
PLA has a very low glass transition temperature usually around 60 centigrade. as the whole printer inside the enclosure warms up, the temperature within the area marked with an orange oval (the critical zone) starts to approach the glass transition temperature of the filament and the result is that the filament softens before it gets to the Melt Zone, of the hot end(the heater block lower section of the heatbreak and the nozzle.
when the heat creeps up into the heatsink area and softens the filament, the pushing force of the extruder bondtech gears, causes the softened filament to swell into the space above the break in the heatbreak (the orange zone) and this causes resistance to movement of the filament and causes the extruder gears to chew up the filament or the motor to skip steps (Often both)
the net result is that you get a clogged extruder.
this is less of a problem with other filament types, because their glass transition temperatures are higher.
even expensive commercial printers like the 'Raise3' (Which is enclosed) suffers from this issue. they recommend leaving the lid open to prevent heating inside the enclosure.
heat creep can occur in hot climates as the room temperature rises. and I have had the problem in my living room in the winter, when the solid fuel fire has got too hot. raising the room temperature enough to cause heat creep.
many people find that leaving the enclosure door open is enough to stop heat creep.
Lowering the printing temperatures is unlikely to prevent heat creep, it may delay the onset of heat creep, however lower temperatures may cause poor inter layer bonding
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Printer will not extrude after putting it in the enclosure.
https://help.prusa3d.com/article/extrusion-stopped-mid-print-heat-creep_1948
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Printer will not extrude after putting it in the enclosure.
look at this video at 16 minutes or there about!
regards Joan
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Printer will not extrude after putting it in the enclosure.
Wow, that was a lot of information. thank you! your suggestions helped. the printer is printing just fine now. all i need to do is to reset the Z Hight.
thank you again!