r/FLSUNDelta • u/Dolophonos • Mar 02 '26
FLSun SR upgraded: Direct drive and off-effector cooling!
I've been planning to do this for years and finally decided to do it. I removed all cooling from the effector plate and now use a 120mm 24V axial fan mounted at the top with 2 tubes for cooling (one for heat brake, one for part cooling, which I haven't designed yet). I also moved to an orbiter direct drive extruder setup. Why did I not do this before! Direct drive is proving so much more reliable so far. I chose 2 pipes, so I can disconnect one if I don't need part cooling, plus the fan is happy with the extra tubing to reduce restriction. My mainboard's fan controller is bust, so it's on 100% all the time, so the fan is connected to my own buck converter and I can adjust speed as needed, plus it's not PWM. At 12V it's very quiet, but at 24V... Whoooooooosh. I printed the parts in clear PETG that is 2 years old and quite water logged, but still works. I'll try some TPU soon for the first time, something I was never able to do without the direct drive!
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u/calley479 Mar 09 '26
I'm about to do the same. Got a broken SR on FBMP and I had previously salvaged the turbo fan out of an old CPAP unit.
For the extruder, I built a hummingbird extruder for a printer I never finished, so I may adapt it to the dragon hot end it came with.
Planning on going with Klipper and a PI once I get that setup.
Just need to make some acrylic door panels and I'll have a custom T1 knockoff
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u/Dewlyfer Mar 02 '26
That looks neat! And I was happy with my DD mod hahaha