When my CR10S Pro hotend blew out the other day, it took my fan duct with it. The fan duct I was using was a good one and if I don't see any improvement I will go back to it, but I thought maybe it was time to see what else there is out there. I found this one which looks good, but I wanted to make some changes to make it easier to print. As usual only the STL was available so I made do by copying some of the critical dimensions and building a new model from scratch. Below is the result and it has yet to be printed or tested. The main changes are:
- The interior galleries have a roof pitched at 45 degrees which should eliminate the need for supports (there is one small area near the opening where I plan to use them but these should be easy to remove - see the pics).
- There is a divider to segment the fan flow so each set of ducts will (theoretically) get half of the air flow from the fan.
- There is a notch where some fans have a tab which can otherwise interfere it sitting fully in the duct.
- Mounting screw holes are elongated to allow some vertical adjustment.
- There are some other minor changes to reduce the need for supports designed into the model as well.
If this works out at least as well as the duct I was using, I will post it up on thingiverse.
Update 10-23-2020: The duct has been working fine since I installed it, but I don't really know if it is an improvement over the old one, so I don't think it's worth the time to set it up on Thingiverse. I have been printing more PETG lately though and have decided that I need to upgrade to a direct drive extruder on the Cr10s Pro since retractions really seem to influence the surface quality (and they are much less severe on a direct drive). I'm probably going to go with the Hydra hot end by BoothyBoothy at Thingiverse (or a remix), so this experiment with a new duct will probably be short lived anyway. Edit (10/27/2020) The Hydra duct will need to be remixed for my cr10s pro, which I can do, but I need to locate the file for the x-gantry/hot end mount for the CR10S Pro which is different from the CR10/Ender3 design.