plus some filament is worse than others and you might have to slightly UP the temperature. check the filament is consistent diameter (push a few lengths though the bowden.)
slightly tighten your feeder.
lightly oil the first metre of filament
each filament is different - I have some that blocks within 1 hour, and some that has never blocked. With the stuff that blocks I use it in my .65mm nozzle for 'prototypes' and use the non-clogging for 'fine' prints. (I mainly used colorfabb - and some old cf blocks, whereas the newer stuff tends not to).
Make sure the Bowden tube sits really properly on the teflon coupler and the end of the Bowden tube is flat. Quite a good trick is to mount the print head but to wait with tightening the four long screws completely until the Bowden tube dits firmly in its place. You may also check if the Bowden clip holder grabs the tube nicely. Scratches on the tube at this spot are an indicator it does not. Finally make sure you never retract more than about 12mm on an UMO.
Link to post
Share on other sites