Now 35 hours into this install, Question 1: what advice do you have for a mk3 that will not reliably reinsert filament into/through the extruder.
- tips are shaped by 1.8mm tube and coupler and mk3 code
- I have a degree in Computer Science and learned GCODE for this and can confirm mine is good (probably)
- I purchased a BMG extruder clone which I have done your 2 fixes for (Q2: how tight should the hand screw be? mine is as loose as possible so the 3dchameleon can push fil past the spring force and still work)
- system running on ender 3 v2 with marlin firmware, with prusaslicer, prints perfectly by itself
It will enter and get caught by the extruder by itself the first few layers of a print, but then a couple tool changes later one of the filaments will eventually not actually insert all the way into the extruder/or the extruder gears won't catch it for some reason, which is print ruined. please help!
Here is all my pics/vids, including the video of the filament not inserting and a pic of where it was at in the extruder. sometimes it's before the gears, sometimes in the gears. currently I am pulling out all filament from the 3dchameleon and starting fresh with untouched filament in case that's the reason. Also here is my GCODE and printer config from prusa
Hey, Bill. Do you have a video on how to replace the spring tension?
Hey, James. I notice that my filament touches the extruder gears first and then my extruder grabs the filament.
"- I purchased a BMG extruder clone (Q2: how tight should the hand screw be? mine is as loose as possible so the 3dchameleon can push fil past the spring force and still work)" Well... that's not correct at all... it should be tight as normal. It sounds like your timing isn't correct... the BMG will take the filament without any force being applied... the idea is that the BMG should be running before the filament reaches it... and the 3DChameleon isn't trying to push past anything... so no force is necessary. When the BMG is running, if you simply place the filament in the BMG, it will automatically grab it.
If you find that the 3DChameleon isn't driving the filament with enough force, there are "Tension Tuning Sliders" on Tinkercad that you can print to move increase the tension on each of the extruders (individually) as well as the bearing placement. This allows you to tune the right amount of force that it can apply to the filament. See here: https://www.tinkercad.com/things/0JBXWmRAdxn-3dchameleon-mk3-tension-tuning-sliders Bill