EVA / v-core-3 XY-Chain

thingiverse

*EXPERIMENTAL* This is an xy-chain mod for the v-core-3 with an EVA toolhead & LGX extruder. This design wraps the chain around the front of the toolhead. The idea is that this way, the chain has a place to go when constrained by a top enclosure (unlike the other v-core xy chains of this style). Best used in combination with a [toolhead board](https://www.thingiverse.com/thing:4960988). ### Toolhead Mount The chain mounts to a modified version of the EVA 2.3 lgx_top part that holds the extruder (top_lgx_XYChain.stp). ### Frame Mount There are two versions of the frame mount. The one shown in the pictures is frame_XYChain.stl, and extends beyond the frame to the inside of the printer to get additional support on the extrusion slot. Note that this may affect your clearance with the toolhead, i.e. if you're using the dual 5015 mod on your EVA. There is an alternate version that doesn't protrude inside the volume (frame_XYChain_nofront.stl). ### Required Hardware The chain used is the Befenybay R18 10X15mm (this may be too small for all your wires if you're not using a toolboard!). I'm using ~40 elements (~2/3ds of a 1m kit). You'll need 6x Ruthex M3 heatset inserts and (ideally) 6x M3x6 or M3x8 countersunk screws to mount the chain. For the frame mount I use M5x15 socket heads + M5 3030 drop-in nuts. ### Performance Warning After using it for about two weeks, it works fine as a cable chain, but I found that these long long "vertical" cable chains for two axis in one have some downside: They can start to "oscillate" at certain frequencies. I've noticed that with the cable chain mounted, a second peak occured in the resonance frequency response plots when doing klipper's input shaping calibration. This also causes a lower recommended maximum acceleration.