Anet A6 Bowden Extruder
Description
This design was inspired by similar designs on thingiverse but modified to suit Anet A6. It improves the extruder resolution by 3.75 and the extruder steps setting will need to be increased by that factor before fine tuning. After printing and during assembly the guide arm part may need adjusting (filing/scraping etc) in order to ensure that the hob makes good pressure on the filament - after cleaning the holes etc. my unit worked without any adjusting. The spring is the original A6 spring. A short length of plastic tube is used as a guide on the input side. Both this tube and the output tube will need cutting to a suitable shape on either side of the hob. A thinned down nut (M6) is used to clamp the bowden fitting. 26/7/2018 Updated Body and Guide Arm to stl's from Onshape. 31/8/2018 Added a Guide Arm with 2mm hole (rather than 4mm). 'Mount.stl' is designed to hold the extruder on the top/back left of the A6 frame. Suggest looking at https://www.thingiverse.com/thing:3040358 and https://www.thingiverse.com/thing:3041436 for the final mods to transform the A6 to another level. On a different subject - after a lot of experimenting with bed levelling I came to the conclusion that the bed springs should only have a very small amount of tension in them. More tension simply distorts the 'H' aluminium underneath the bed. This makes bed levelling very difficult and can result in the Y bearings binding. It may be necessary to add some form of Z end stop adjustment to accommodate this. Since adopting this approach bed levelling issues have disappeared. Search 'NevG' for other designs by this author.
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