I constantly get a jammed extruder. On longer prints more likely than on shorter prints. Short means the 20mmBox.stl from the Essential Calibration Set on Thingiverse.
When it comes to printing the Y-drive replacement made by MacAttak for the TwoUp it jams.
I took the fan that normaly cools the filament and the extruder nozzle and mounted (glued) it on top of the extruder motor. CA glue and zip ties seems to be THE weapon of choice when it comes to TwoUp
customer design adjustments enhancements.
As Nathan from QU-BD said ‘Note, the printer will work as supplied. However, making some changes here will make it better. ‘ (link)
So true. So true.
The printrboard potis are default set to 50%. This is quite a bit for those little steppers and the result is that they heat up pretty much. Above all the extruder stepper is heating up to the point were the heat is transfered over it’s axis and the brass bolt to the filament. If you are using PLA filament which gets soft at 100°C this means that it is very likly that the filemant winds up just before it entered the extruder leaving you with the mess of cleaning up the extruder and remove the excess plastic.
So setting the extruder stepper to 300mV should just help in keeping the motors temperature low and the filament flowing.
Because ….the Filament must flow….