Re: Fan Control in 3D printers #3D
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Charlie A nice compact job.Well done. I cheated and opted for a pair of 240V to 12V variable controllers, from Banggold. Not a typo error LOL. Not being an electrical genius, but the thought occurred to me by taking the 12 volts off the control board it seems this helps?in speeding up the heating of the nozzle and bed, all those amps and voltage and watts stuff LOL.I like making predominantly chips. Serious question though. Why be blowing air around the bed and nozzle when you are trying to heat things up. ?? this always puzzled me. I generally run the first?layers without any forced?cooling air, then bring my bed fans (plural) as i use 2 up to about 8 V (depends on the air temp under the hood) at the time, and a gentle flow of 6V to the extruder. Surprisingly If I radically manually increase the air to the extruder fan, you can see the nozzle temps really take a rapid dive, so it shows some of this air flow is going straight to the nozzle, so the control board has to work overtime maintaining the pre set nozzle temps. Not a good idea IMHO. especially when printing ABS. Worth mentioning, my Prusa I3 PC board has no fan speed controls, with or without g codes. I think the Arduino type 2560 does have this feature. at the moment with the Sanguinololu board fans they are always turning? on at start up, mine do not anymore. The fan I do not control is the one that blows down on the top of the PCB board.and is well out of the print areas. Have a good squirting 3D week, 70% is in the design of parts that are user friendly to the printer, IE no hanging roof designs that gravity will pull down,? and 30% is art, knowing how to make the paint (filament) flow and stick? Have a good one. On Mon, 7 Oct 2019 at 14:58, CLevinski <clevinski@...> wrote: Hi, All, --
John |
John Lindo