Fixed Single/Double cooling fan with Effector hook mounts

thingiverse

I remixed this fan shroud because the original creator didn't respond to my comment pointing out a bug. When printed for one fan, it retains little blocks that are essential when using two fans - to prevent one fan from back-feeding into the other, but when remixed into a single fan shroud, the blocks remained so only half of the lower ring feeds. I added two partially parametric hooks designed to allow this device to hang from an effector without a wade mount. A couple days later I realized that I had uploaded test parameters, not actual working code, so I re-uploaded everything. So, I fixed two bugs in the code, wrote some new code of my own, and finally got the version I wanted printed. My two 30mm fans were attached, and after installation, every time I tried to use the cooling fan, the printer freaked out, noting that it was heating the hotend, but the hotend seemed to be cooling - a potential runaway situation. It aborted and shut everything down. I had to power cycle to recover; M999 wouldn't work. What happened was that the blower was too high, blowing directly on the hot block instead of the print. I considered fixing this issue, which would require lengthening the central body by about a centimeter. The fan should stay in its current position (meaning it shouldn't be lowered; maybe it should be raised and angled), with a slot in the blower ring for the wires. For a two-fan setup, it should replace one of the blocks that I omitted (and can't just be cut - it has to be shaped, and blocks in the blower ring need to be installed). Maybe a cylinder within a cylinder. For a single fan system, it would require cutting through the wade mount helper hole opposite the fan, with no blocks blocking the delivery tube or the wade mount. This implies that this drawing should be done after the wade mount helper tunes are drawn - very late in the design process. But I don't want to do that now; and I don't see it as useful unless it's not constrained to blow on the hot block. So, I'm going to try something else.