Hi, How do you go about swapping filament with the Titan? I tried it as with my wades extruder. - heat to 80 deg C (PLA) - Quickly back out filament. This gave me a clean change every time. But trying the same thing with the Titan gives me troubles. The very end of the filament that comes up from the hotend is a bit deformed from being melted and gets stuck in the white (3 mm) filament guide. I guess I could cut the filament and just feed the new in as I extrude. But that is only good for change if color in the same material. I do not want to do that if I change from ABS to PLA or the other way around. Much less so when going from ABS to a flexible. So how do you guys change filament?
Should I use the same temperature when doing it that way mike01hu? Sounds a bit backwards to first push it in. Would that not deform it even more?
I heat mine to 210 (if changing from PLA) and then pull the idler open and pull the filament (no push). I then hold the idler open and push the new filament in and then i'll extrude 100mm and proceed to print with new filament. This is when PLA -> PLA. I may do different temps if different materials.
When heating all the way up to 210 do you get all PLA out? I have tried 210 before and it was always PLA left in the hotend. And also when pulling it out at that temp you get a long string thruu the whole extruder. But keep suggestions coming, I will try them all.
I have the same issue when changing/removing filament. the little piece of PTFE required for 1.75 filament comes out far too easily. Below is a pic of the Titan clone idler arm. I is an improvement in a couple of ways - - The hole size in the lever for the PTFE is a tighter fit and doesn't come out easily when changing filament. - The top is redesigned to allow easier access to move it to release the filament. I have an original Titan and a clone so I have been able to compare the differences first hand.
I do not see how any change to the idler arm would eliminate filament getting stuck in the filament guide when backing it out of the hotend?