Sunbeam Rheosmart 6 Fan Controller

[spongebob128]

I noticed that the RPM reported by my Delta non-pwm fan (AFB1212SHE-CF00) went totally insane when on the Rheosmart's PWM controlled mode (50000 RPM!, etc.) so I guessed that the outputted power quality is utterly garbage in PWM controlled mode. So I went to a Radio Shack and got me a big-ass capacitor and soldered it to a fan header and bingo the RPM became good and rheosmart worked. The rheosmart still has a low range on the AFB1212SHE. I think in PWM controlled mode the fan outputs are ganged together by the switches, so you only have to do one fan header. Encouraged by my success I even plugged my PWM fan (Delta FFB1212EH-PWM) (#2) in the Rheosmart as a non-pwm fan for ganged control. The Rheosmart still has a very low PWM range though:

#1 #2
0% 0 0
1% 1654 384
2% 1976 686
3% 2319 988
4% 2477 1102
5% 2689 1350
6% 2830 1459
7% 2967 1618
8% 3096 1719
9% 3214 1851
10% 3341 1962
15% 3552 2335
20% 3658 2601
25% 3708 2818
30% 3760 2980
35% 3781 3125
40% 3824 3237
45% 3835 3358
50% 3857 3452
55% 3857 3524
etc.
100% 3901 3924

Note you do lose some max voltage with the rheosmart as these fans will be about 4100 RPM when direct connected.

 

[Senraeth]

I just purchased a Rheosmart 6 and am having trouble getting the Auto mode to work at all. Maybe someone in this thread has faced a similar issue and can help me out. I plugged in the 4 pin connector to the mobo's cpu fan header and connected the splitter to my PWM CPU fan and the rheosmart. My CPU fan reads the PWM signal from the mobo fine and adjusts its speed automatically as it should and the case fans I connected to the rheosmart (using the molex to 3 pin adapters) work fine in manual mode, however when I switch them to auto mode they just ramp up to full speed right away and are not auto adjusting at all. The auto mode was the main reason I bought this unit so any help would be greatly appreciated.

 

[deimos3428]

I just purchased a Rheosmart 6 and am having trouble getting the Auto mode to work at all. Maybe someone in this thread has faced a similar issue and can help me out. I plugged in the 4 pin connector to the mobo's cpu fan header and connected the splitter to my PWM CPU fan and the rheosmart. My CPU fan reads the PWM signal from the mobo fine and adjusts its speed automatically as it should and the case fans I connected to the rheosmart (using the molex to 3 pin adapters) work fine in manual mode, however when I switch them to auto mode they just ramp up to full speed right away and are not auto adjusting at all. The auto mode was the main reason I bought this unit so any help would be greatly appreciated.

I have the same issue. Never got it to work. (Though it wasn't a major part of my purchasing decision; I just like the look of it.)

 

[Senraeth]

I noticed that the RPM reported by my Delta non-pwm fan (AFB1212SHE-CF00) went totally insane when on the Rheosmart's PWM controlled mode (50000 RPM!, etc.) so I guessed that the outputted power quality is utterly garbage in PWM controlled mode. So I went to a Radio Shack and got me a big-ass capacitor and soldered it to a fan header and bingo the RPM became good and rheosmart worked.

spongebob, do you think your hack would help with my issue? Was your Delta non-pwm fan actually going at full speed before the mod or just reporting a wrong RPM? If it was similar to my issue, do you think you could detail what you did and what you used a little more? Thanks.