LYNX 2.1 - Linear Rail Mod

prusaprinters

Update July 24th 2024: Added alternate version of the detent parts (pump bottom and spine) these variants will hold the detent a little more snug, based on some user feedback. Thanks to @bobmtran for the update. Only works with the 2.1 Lynx. These files will replace the stock shroud and pump. IMPORTANT NOTE - Your take down pin affixed muzzle device will almost certainly not work with this mod, though it could perhaps be modified to work. And the rail carriage's proximity to the barrel will likely prevent the use of an “in shroud” pcar/scar.Hardware needed:For RailQTY:  1...MGN9H or MGN9C 150mm Linear RailQTY:  8...M3x8mm Socket Head ScrewsQTY:  8...M3 Hex NutsFor PumpQTY:  4...#6-32 Hex NutsQTY:  4...#6-32 Lock WashersQTY:  4...#6-32_3/8in Round Head ScrewsOPTIONAL:6x7mm Ball Detent, for use with alternate spine and pump bottomAssembling the pump can be tricky. A reference assembly is included at an attached step file that includes all the hardware in the correct place (it is of the Lonx version, but the assembly is identical minus 2 screws.) Use the spine to keep the 6-32 hex nuts in place in the pump bottom, layer on the pump bar, then sandwich the outer pump top and secure the round head screws in place with lock washers. The opposite side should be a little easier, but you will need to nudge the hex nuts in place between the pump pieces before sliding in the bar. For best results use something strong and very ridged for your rail spine print.Use supports as pictured for the pump top and make sure to trim and file them down well. The rail carriage should be very snug inside, but it should fit all the way in to allow the pump bottom to attach.A big thank you to Bobmtran for his help adapting the spine and pump to use a detent.