LGX Fast-Swap-Rigid EVA mod
Description
The Fast-Swap-Rigid face plates for the EVA carriages enable faster swapping of hot ends (under 5 minutes) and provides a more rigid mount for extruders which provides more consistent extrusion at higher speeds...and hence better quality prints. There is a separate Fast-Swap-Rigid face plate, Thingiverse listing for each extruder. If you decide to contribute to my coffee fund to keep me up late at night doing more of this stuff I would appreciate this, But there is absolutely no obligation for you to do this. My PayPal account is liam@fastbikegear.co.nz I developed this mod primarily for myself to suit the range of extruder and hot end options I use. I may not add support for other hot ends and extruders. This mod currently supports the following: Extruders: Orbiter 1.5 Orbiter 2 LGX Lite LGX Hot ends: Dragon SF Dragon HF Rapido HF Rapido UHF All other EVA supported hot ends in the lower mount position. Please note each part of this system is compatible with a standard EV with the standard EVA carriage. This is not surprising, as this mod is developed from Pawel Kucmus's brilliant EVA carriage system. Some fan ducts may not be compatible with the probe mount. 1. Fast Swapping of hot ends. Dual height mounting options allow you to achieve the same nozzle height with all four hot ends options in the list above. This means there is no need to change ducts, move the prove or Z off-set in printer firmware when swapping hot ends. The probe holder mounts to the front plate rather than hot end mount so you don't need to move it when swapping between different hot ends. At this stage, I have only modelled a probe holder for the 8 mm SuperPINDA probe I use. 2. More Rigid. The extruders mount to the same monolithic piece of plastic as the hot end. In edition there are supporting webs between the extruder ledge and the front of the face plate, so there should be even less flex between the extruder and hot end than EVA 2.4 (which was an improvement over EVA 2.3 but does not eliminate flex at high extrusion speeds. 4. The filament path is the same length with all three hot ends. One of the design goals was that I did not want to have to increase the length of the filament path when using the Rapido UHF. 5. This mod uses threaded heat inserts everywhere. For Dragon hot ends: I have included a revised lower support for the Dragon hot end that allows the use of threaded inserts. You can also use the standard EVA lower Dragon mount. The Dragon lower h support is not used with the Rapido hot end. Use the standard EVA Dragon hot end mount. Dragon hot ends are mounted using the lower position on the face plate. For Rapido hot ends: You will need to use the Rapido mount which allows you swap between hot ends without having to move the probe. Rapido UHF is mounted in higher position on the face plate. Rapido HF is mounted in the lower position on the face plate. All hot ends: This mod supports all other hot ends supported by the EVA ecosystem. Other than the Rapido UHF all other hot ends should be mounted in the lower mounting position to avoid the heat block being too close to the plastic of the face plate. All holes are either 3mm of 4 mm. I have not modelled any clearances in these holes as I prefer to drill them out post printing to get the best possible tolerances to achieve the most rigid mounting. This mod is designed to use M3 x 4.4mm diameter x 5 mm long brass inserts everywhere to make assembling and servicing faster. The design allows for threaded inserts up to 5 mm long. I used these ones https://www.aliexpress.com/item/1005001407970757.html You will also need a few different length M3 cap screws - I am sorry I have not detailed the lengths of these as I jut used what I had readily at hand. This design has been developed from Pawel Kucmus's brilliant EVA eco system and inherits the same GPL license a the original. This is not intended to be a replacement for the EVA system but rather a mod that better supports a limited range of hot ends and extruders. For more information on the brilliant EVA system please see: https://main.eva-3d.page/
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