Gaping Maw back plates, fan mounts & ducts for Rat Rig printer carriages.

thingiverse

Gaping Maw fan mounts, back plates and ducts for Superlight Fast-Swap-Rigid carrier for Rat Rig V-Core 3 printers. If you have an EVA 3, I recommend upgrading all carriage components to Superlight Fast-Swap-Rigid components to use the Gaping Maw back plates, fan mounts and ducts. EVA 2 users can just mix and match components as they like. The large size of the Gaping Maw ports is made possible due to integration of the parts cooling duct into the bottom plate of the carriage. <b>To implement the Gaping Maw fan ducting you need four parts</b> 1. Integrated duct-bottom plate 2. Back plate. (choose for your fan option) 3. Fan Mount. (Choose for your fan option) <b>Universal Integrated duct-bottom plates</b> 1. D&R type - optimised for Dragon & *Rapido hot ends. The new V6 D&R duct is quite wide and may require you to reset the position of your X stop so that the duct does not hit the XY joiners. 2. M type - Optimised for Mosquito hot end. *To be able to use the Gaping Maw Ducts with the Rapido UHF you will need to use the Fast-Swap-Rigid face plate that has an upper an lower mounting position for the hot end. <b>Gaping Maw tensioner-less back plates are available with or without belt tensioners</b> The Gaping Maw integrated duct-bottom plates must be used with a back plate with the Gaping Maw port size. Tensioner-less Gaping Maw back plates are designed to be used with printers that have the belt tensioners relocated from the EVA carriage back plate to the front idlers. <b>Gaping Maw Tensioner-less back plates</b> 1. Gaping Maw tensioner-less back plate for dual 5015 fans. With this mount dual 5015 fans push a lot more air through the Gaping Maw port size than other dual 5015 fan mounting options that use the standard EVA port size. 2. Gaping Maw tensioner-less back plate for 4028 fan mounting. 3. Gaping Maw tensioner-less back plate for EBM-PAPST fan mounting. 4. Gaping Maw tensioner-less back plate for 15mm CPAP fan hose mounting. 5. Gaping Maw *Orbiter 1.5 tensioner-less back plate for EBM-PAPST fan mounting. * Due to the extra length of the Orbiter 1.5 extruder specific tensioner-less back plates with an off set cable mount are required. If you don't see the one you need here, please let me know in the comments <b>Gaping Maw tensioner-less fan mounts</b> 1. Dual 5015 fan mount. 2. 4028 fan mount. Remove snap-off internal supports after printing. You will notice that the four holes for mounting the fan are two different sizes. The front two are 4mm designed for heat inserts and the back two are 3mm to accept 3mm mm cap screws that are inserted from the bottom up. For these back two stick the heat inserts into the fan body and just use 10mm x 3 mm cap screws. For the two front ones use 36mm x 3 mm cap screws 3. CPAP 15 mm hose mount. (Remove internal supports after printing.) 4. EBM-PAPST fan mount. If you are using a back plate without tensioners you will need to have some other way to tension your belts. Please see the front idler tensioners used in the Gold Series OpenFront printer. https://www.thingiverse.com/thing:5176411 <b>Gaping Maw back plates with standard Rat Rig belt tensioners</b> 1. Gaping Maw 4028 fan mount back plate with tensioners https://www.thingiverse.com/thing:5330852 <b>Acknowledgements</b> The Gaping Maw ecosystem is a derivative of the original brilliant EVA carriage developed by Pawel Kucmus. Hence the Gaping Maw integrated duct-bottom plate and back plates are compatible with the standard EVA carriage ecosystem. <b>BOM for use with Tensioner-less back plate</b> 2 x M3 x 8 mm or 10 mm long cap screws for holding the fan mount on. 3 x M3 brass heat inserts for the integrated bottom plate/fan duct 4 x M3 threaded inserts for the back plate <b>Instructions and BOMs</b> <b>Dual 5015 fan mount:</b> You will need to cut off the two rear facing mounts on your fans so that they do not hit the foot of the rear 'flying umbilical cable' mount. This is easily done with a hacksaw. BOM 1 x M3 x 45 mm Cap Screw (upper fan mount) 1 x M3 lock nut (upper fan mount). 2 x M3 x 12 mm cap screws (lower fan mount) 2 x M3 threaded inserts. <b>4028 fan mount:</b> Note this is modelled with internal supports in the top section of the duct to make it easier to print. Please remove these supports after printing. 4 x M3 32 mm (upper fan mount) 2 x M3 x 12 mm cap screws (lower fan mount) 6 x M3 threaded inserts. <b>PEBM-PAPST fan mount:</b> BOM 1 x M3 X 20 mm Cap Screw (upper fan mount). 2 x M3 x 12 mm cap screws (lower fan mount). 3 x M3 threaded inserts. 1 x EBM-PAPST fan (https://nl.farnell.com/ebm-papst/rlf35-8-14n/blower-radial-51mm-24vdc/dp/1293483) <b>Tensioner-less back plates:</b> BOM The tensioner-less back plates are mounted using your existing 3mm cap screws. 4 x M3 threaded inserts. https://www.aliexpress.com/item/1005001407970757.html To attach belts install the tensioner-less back plate on your standard EVA carriage or the Fast-Swap--Rigid carriage and then double the last 15 mm of your belt over and feed through the retaining slots. Insert a small length of filament into the doubled over portion and pull tight. I use these brass threaded inserts, but others of similar size will work fine too. I install then using a standard soldering iron with a round pointed tip. https://www.aliexpress.com/item/1005001407970757.html Update 26/03/22 Changed spacing of bottom mounting holes to provide more clearance for the heads of the cap head screws. Updated 18/04/22 Moved hole for PTFE tube on tensioner-less back plates so that PTFE tube can sit tidily hidden inside your flying umbilical cord cable wrap. Update 24/04/22 Made ducts easier to print. Consolidated Dragon and Rapido duct into the D&R duct as I discovered the Dragon Duct also worked best with the Rapido hot end. Update 4/05/22 Increased thickness of integrated bottom plate/ducts to match chamfer on front plates. This is a cosmetic change only. Update 14/05/22 Changed Dragon and Rapido Gaping Maw duct from Tri-horn cut to Bi-horn duct. Update 18/05/22 V2 4028 fan mount. Corrects interference with belt retainer. Update 14/06/22 Updated Dragon and Rapido (D&R) cooling duct.