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m4rten86

Material change time

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Hello,

i shortend the bowdentube and moved the feeder above the ultimaker2 to prevent too much friction in the tube. when i want to change the filament now, the forward and backward time ( especially the forward movewment) of the feeder motor is much to long and it would deliver the filament to the nozzle much to fast before it slows down. how can i lower the time for that part of the program ?

i got a little experience in arduino sketches if i needs that...

i hope my text is "understandable" :)

 

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I never use "CHANGE FILAMENT" anymore. Just heat the nozzle to 90C and pull hard on the filament. If head is hotter than 90C wait until it reaches 90C before pulling. When the filament is half way up the tube, let it cool for 10 seconds, then pull it the rest of the way - pull as fast as possible when the tip goes through the feeder. About once every 30 times it breaks off inside the feeder :(

To put the new filament in, just push it in through the feeder.

 

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If you do what gr5 suggests and you find that the filament wont budge it could be that the feeder motor is still turned on. If you've done a "Move material" for example just prior to trying to remove the filament (I do this sometimes to make sure I have a full melt chamber when performing an "Atomic" clean) then the motor will be energized and holding the filament in place. Waiting for it to auto shut off or simply turning the machine off will release it.

 

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Or use Robert's extruder, and don't bother waiting for the "Change Material" routine. Because you can disengage the drive wheel, you can remove and feed filament thru the Bowden tube manually.

 

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