3D Digital Clippy for Ender 3 V3 KE
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Servo driven 3D clippy fits the head on a Ender 3 V3 KE. Should also fit SE.
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Tested and working for cutting filament. Not running MMU yet so it is not heavily tested.
Model still has some prisms and might could use more fillets but it works well enough. Printed with tree supports and raft, blade channel is vertical. Some hole sizes may need to be adjusted for heat insert tolerancing.
Has cutouts to allow depressing the feed idler and to view the feed gear.
Blade holder pocket redesigned for servo arm: https://www.amazon.com/dp/B0DCS997T7?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_1&th=1
Three screws on head shroud are removed and replaced with M3X0.5 x 10mm long flathead SHCS to mount the cutter assembly.
Servo mount holes are sized for M2.5x0.45 threaded heatset inserts. Assemble with M2.5x0.45 x 12mm long SHCS.
Filament inlet is sized for a M6x8x8 threaded heatset insert. Insert allows installation of PC4-M6 fitting. (This is the sort of fitting for 4mm OD tubing that doesn't allow the tube to pass through the fitting.) Fitting had to be drilled out with a 7/64 (.109") drill to allow filament to easily pass through when feeding in.
The filament inlet hole center is a little tricky as this mounts to the shroud. It is quite possible that the hole center will have to be moved around to align on individual heads.
Alignment tool for servo arm angle also included. Allows you to align the servo arm for the 45deg swing it makes during a cut. I think the servo has to be homed first by connecting it to the 3D Chameleon and powering it up. After that, disconnect and attach servo arm to servo axle through the test head.
You screw the servo arm into the test axle. You want to be able to rotate the servo arm on the axle with a little resistance. Then you wiggle the servo arm, servo, blade holder together, then you check the 45deg rotation. Repeat until it doesn't bind and makes sense.
There are two tabs on the test head and one on the axle that give you 45deg. Use small wood or sheet metal screws for this for mounting axle. Probably don't need screws for the servo. I imagine it would be easy to break arms or mounts if you don't set this correctly before attempting filament cut.
Blade holder is lubricated with beeswax.