![Very Happy :D](./images/smilies/icon_e_biggrin.gif)
About the 50mm fan pwm, no idea sorry, but for 24v there are many (umo+ ones)
What are you calling 'load'? this is not an electrical unit of measureNeotko wrote:Guys one question... UMO works with 19V right? What's the maximum load it can handle?
Right. For a dual fan setup, I would go with 2x24v in parallel (or 2x12v in series, but PWM fans in series are not always great)Neotko wrote:Also, should 24V fans (the ones umo+ uses) work on umo? UMO+ default fans work perfect with the pwm, so the little difference in V it might just make them work a %? less? Just brainstorming.
If your fan does not spin with a 12v battery, it is dead (if it is a 'strict' 12v the 19v of the Ultimaker might have killed it -- I never understood why they used 12v fans on the UMO)LePaul wrote:I think the splice failed on the second fan, since plugging direct 12v battery didn't spin it
No! the 3rd wire is a speed sensor to tell how fast the fan is spinning.LePaul wrote: But even if it did, you're saying it would not have worked. Ok, but aren't PWM fans 3 wire, not 2?
Heater is no issue, it is just takes longer to heat. For the 5v, again be careful. On my 1.5.3 board I cannot (I can't even power my ulticontroller with it)Neotko wrote:UMO+ and UMO are quite alike. I been even thinking that it should be pretty easy to use a um2 head on umo. You have a point to get constant airflow for the 5v fan, you can use 3mm size heat sensor to plug on where the pt100 goes, and I bet that the 24V heater would work on the 19V heater plug of umo... I wonder why noone triedOn my mind seems pretty easy.
Looks good.LePaul wrote:Perhaps this one? Wire leads tho...which is fine, soldering required.
Right size...seems to show two wires and PWM
http://www.mouser.com/ProductDetail/Del ... Qmbg%3d%3d
Lance gave such estimates of efficiency between a stock and its shroud designNeotko wrote:Well I really can't find it. But this it's the post where I did test the anders olsson nozzle with a dual fan setup.
https://ultimaker.com/en/community/1065 ... ply-114954
Labern says something really interesting about the airflow and distance, but to make a good good good fan cap you need a airflow simulator.
Amedee XDDD
The original airflow using the original fan shroud has an air flow of 0.6m/s
My design with the Olsson block has an air flow of 2.5m/s so a whole lot better.
From the 1.5.7 schematics, we have a BD679 So we should be good for 4A which is way more that what we need.Neotko wrote:Amedee for load I mean the max amps, I remember to saw some posts about the umo 1.5 transistor going boom easily. (Same happens on umo+ if more than 200mA are in use)
This is not true.Titus wrote:PWM is just a way to dim the voltage. So unless the fan shuts down under 11V or something, there is no such thing as a non pwm fan. PWN fans are usually the fans with 3 wires right, the yellow being signal, or internal 'pwn'.
Kill instantly? How so?Dim3nsioneer wrote:LePaul, I can feel your misery... I'm in exactly the same position but for 30x30mm fans... thought of trying some Delta fans as well... but honestly, one might kill them instantly...