Maybe Just One More... Hotend Carriage!!
Description
IMPORTANT NOTE: This design is currently a major work in progress. I've been struggling with stringing a lot, and in the last 2 months, I've been troubleshooting it. No matter what settings I use, the stringing is not going away. SO, I've narrowed it down to be related to the hotend carriage I've designed. My thoughts? I believe it to be related to the hotend (not part) fan placement. I'm now redesigning. The likely solution will be to use one of those fan mounts for E3D you can find on thingiverse. Later, I'll add some other way (maybe) to put the fan on. For now, I don't recommend using this carriage (so sorry). **Now don't expect much...** Here's just one more to add to the pile of hotend carriages. I've worked for almost 2 months, just tinkering around on this one design. *26* versions and plenty more prints than that later, this popped out. **Before you read all this... Here's the basics:** -The files are all necessary except for "Fan Rest.stl". That is simply for the hotend fan (not part fan) to rest on. -This carriage uses 2 4010 blower fans, a 4020 or 4010 case fan, a BLTouch, an E3D v6 hotend, 12 short m4 screws (for the bearing blocks), 2 longer m4 screws (for the hotend fastener) and nuts, then an assortment of m3 for the fans and BLTouch. Now why add one more carriage to the mix? Because I'm never satisfied. The work I've put into this (I believe) has payed off to create exactly what I wanted: a carriage that was, most of all, steady and sturdy, then, next, could pull off Prusa-printer-level cooling, and, overall, be incredibly simple, dense, and small. Now I said "incredibly!" I've made every aspect of this design just that: incredible. First off, the cooling! I've always been cheap; buying cheap fans, printing every printer part I can, etc. So after a couple tests, I've found that 4010 blower fans are perfect for this situation. Most people upgrade them, saying that they are total junk. Maybe I bought just the right one, or maybe I've got the design just perfect (not likely; lol), but these fans are great. Yes, I said "these". I've placed two 4010s on this carriage, packed close to the hotend. Now there's a catch to that: you print this carriage, you're gonna end up using my fan ducts (they were made for this). As a side note, those mentioned ducts are perfectly positioned so that the nozzle will not cool down majorly. That has been an issue in many other carriages I've used: the fan placement is bad. I even have had to change thermal runaway settings and enable fan-speed-dependent PID settings in Marlin! *I don't want that for other people!* On to the density and simplicity part: I've tested only a couple other carriages, but it's been my experience that most carriages are not that dense. The designers blame it on bad cooling leading to heat creep or other related items. I've never even run into an issue like that yet. I designed this in TinkerCAD. Every part except for the backplate of the triple bearing design is custom. For said backplate I used one of @morganlowe's hotend designs and just cut off the top parts :) because I'm just lazy and didn't want to get the hole distances. Quick note: there is an extra hole for the cable chain as shown in the pictures above. Don't worry about it, use it, whatever works for you. This design was for me, and I just felt like sharing. :) Over to the printing of this part, look at the print settings below, but do note that I made this to be printed with only one area of supports. That is pointed out in the screenshots from PrusaSlicer. If you're anything like me, you hate supports. So there's my gift to you. Now keep in mind that this is version 26, but not the final. Really, I'm never going to stop working on this design. Just wait, it'll be different soon! Feel free to post a make of this; I'd love to see it used somewhere else! **EDITS!!** - EDIT 10/27/21: - lowered 4010 fan position. Errors related to this have been found (in my case, thermal runaway). - FILES CHANGED: Carriage Base.stl - EDIT 11/3/21: - fan position is still funky. Based on my render, there should now be about 1.2-1.8mm between the nozzle and fan. Working this out, and also moved BLTouch to facilitate better access to fan screws. - FILES CHANGED: Carriage Base.stl - EDIT 11/10/21 - Look at the first paragraphs. Those explain plenty. Hotend cooling is now being sorted out, and a solution will be posted in due time.
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