I decided to recap this power supply before using my second 3D printer
Creality 3 printer switching power supply recapped
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Re: Creality 3 printer switching power supply recapped
I am glad you comment about the quality of this switching power supply
The only complaint I have about this board is that 3 output caps mounting holes are little bit off in the hole size couple of were a little bit over sizedLast edited by sam_sam_sam; 11-17-2020, 05:14 PM.Comment
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Re: Creality 3 printer switching power supply recapped
Update
Ran power supply on the filament heater ( about 2 amp draw ) for over 24 hours every when well
I also modified the switching power supply and added a power supply jack for the filament heater and relocated the indicator LED to the incoming power supply housing where I can this light
One note I have to modify the Ender 3D bed heater controller output because once it gets to temperature it cycles way to fast and plays hell with my battery backup for my computer and 3D printer this heater draws a lot of current when on I go to add a PWM controller to the bed heater and back down the current until the temperature cycle is more reasonableLast edited by sam_sam_sam; 11-19-2020, 08:33 AM.Comment
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Re: Creality 3 printer switching power supply recapped
It is.
Classic H-bridge with KA7500. Pretty reliable when designed right.
I wouldn't trust the label worth a damn, though.
15 Amps at 24V? That's 360 Watts. Even at a super-optimistic 85% efficiency (which I doubt this Chinese thing will ever do), the PSU should be drawing over 420 Watts from the wall. So those heatsinks and the transformer will need to be dissipating around 60 Watts total at that power. Do you see it happening? I don't, and even less without a fan. 6-7 Amps is probably a more realistic continuous rating.
The lack of real safety marks also doesn't inspire any confidence either.Comment
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by sam_sam_samI have been working on this concept for quite some time now with limited success but recently I found a switching power supply that is setup for the voltage that this soldering station needs to operate at however it also needs part of the secondary circuit from the original switching power because you need several voltage rails
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