Side (stock/BMG) extruder mount adapter for FLSUN SR
Description
This is not really a remix, but more of an adapter to work with Walker56's extruder mount. Walker's mount is intended for the Voron M4 extruder, and I prefer to work with a BMG-clone extruder. <strong>You'll want his longer mount.</strong> This mount also has the feature of vibration isolation using rubber grommets to minimize extruder retraction noise. Since this mount is a bit longer than stock, you may need a longer cable or do some cable rerouting to get this to work. I've added a 13mm shorter version (untested) that may work better with the stock cable. I've included a wedge to move the extruder away from the print area. When I had the offset in the mount, I had ugly surfaces from the supports, so decided a wedge would work better. Most grommets are made for metal parts and since the part I printed was 4 mm thick, I had to improvise. The grommets I had came from a box of assorted sizes. You'll want one with a 4 mm inside hole (the bolt size for the stock mount), and an outside diameter of about 7 mm (the hole in the printed part). If you need a larger hole, you could simply drill out the mount to a slightly larger size. So how are we going to get these thin grommets to work with a 3 mm thick part? Carefully with a sharp knife, razor blade, or Exacto knife, cut off one side of the grommet along one inside edge, so the inner part is on the half we're going to use. So for 3 holes, you'd need to cut at least 6 grommets, since we're going to use the good half on both sides of a mounting hole. You'll also want a 4 mm washer for the bolt head. Since the effectiveness of our improvised vibration mount decreases the tighter you make the bolt, you'll want some Loctite or some other means of securing these bolts so you don't drop an extruder in the middle of a print. While printing, play with the tightness for maximum stability with minimum noise, then Loctite it in place. <strong>If you have the patience,</strong> I drilled out the grommet holes to 7.5mm, then managed to work an intact (uncut) 7 mm OD grommet into the hole and assemble it. In theory, this should work better, but cutting them is SO much easier. <hr> <strong>Update 9/19/2021:</strong> Created a version 2 of the mount with the extruder rotated 90° (to reduce the chance of collision with the print head) and mount holes with any multiple of 15° for a shorter PTFE tube. 45° might be the sweet spot, but I'll let you play. The wedge with this mount is optional. <strong>Sorry, this is going to require a longer extruder motor cable and is barely going to fit on the SR bed.</strong> If there's interest, I'll make a shorter version. Added runout sensor mount with offset to improve feed angle. <hr> Like my work? Post a make! <hr> <strong>Hardware:</strong> two 30mm x M3 screws, if you use the 10mm spacer for the extruder run-out sensor. three 12mm x M3 screws with washers to attach this mount & wedge to the other mount. <hr>
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