I keep having issues with filament randomly getting stuck in the Y adapter. Sometimes it happens when retracting sometimes it happens when it's trying to feed up to the extruder. If I'm around when it happens I can grab the filament and help it along either way and it sometimes it's fine from them on sometimes an hour later it will do the same thing. I have adjusted the POTS to the 1oclock position. I have also loosened the screws on the Y slightly to make the travel path slightly larger. Nothing seems to help. What can I do to give this system enough guts to move the filament like it should without having to constantly babysit. This system is advertised as plug and play not babysitters club.
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Ok... there are a few causes of low tension on the filament.
1) The MK8 drive gear isn't aligned on the shaft correctly. This can happen if the screws are not tight enough or if the spacer isn't in place... but can also happen simply due to variations in the printing. Make sure the drive gear is fully engaging the filament, and not engaging it with the flat portion of the drive gear. 2) The spacing between the drive gear and the bearings is not even... so it's closer to one bearing than the other. 3) The spring tension is not high enough for good grip on the filament. #1 is to simply move the drive gear up and down to make sure they match the filament path. Using a small Allen key, you can loosen them and place them correctly.
#2 and #3 can be adjusted by using our Tension Tuning Sliders (https://www.tinkercad.com/things/0JBXWmRAdxn-3dchameleon-mk3-tension-tuning-sliders) On the vertical axis, you're increasing the tension or lowering the tension (in your case, you'll want to go up.) But, if you find that you've gone all the way up and it's still slipping, then that tells me that the bearing is too far away from the drive gear... so you can move it closer by moving to the right column. That will move the bearing .25mm closer to the drive gear. (Conversely, the left column, moves it .25mm away... which can be applied to the other bearing on the opposite side.) Make sure you carefully separate the two halves of the bearing carriers, as you can easily break off the pins holding them together. (If so, you can always reprint them... they can be found on our Printables page here: https://www.printables.com/model/354998-3dchameleon-bc-replacement-parts-with-ptfe-grip/files Bill