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Going from 12V electronics to 24V produces a reduction in the overall amount of heat generated in the electronics (that are not intended to get hot). These include the motors, drivers, mosfets and pcb traces.

Why then given that 48V power supplies and electronic components cost exactly the same as their 24v counterparts, are there no 48V 3d printers?

Is there a saftey aspect to 48V that needs to be considered?

EDIT: Yes 48V fans cost a little more but it's not exorbitant. It seems odd to move from 12 to 24 to get half as much heat, when you could move from 12 to 48v and get a quarter as much heat.

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I believe the main issue is the voltage regulators and capacitors on your standard print main board are not rated for 48V. You can find some CNC shields that can handle up to 36V but these are lacking 3d printer features such as heater ports and only have 4 stepper slots.

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  • $\begingroup$ So higher rated components cost way more? $\endgroup$ – user77232 Aug 6 '19 at 20:54
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    $\begingroup$ Only in the sense that they are not widely used, therefore the demand is not as high causing the per component price to go up. Note I am not an electrical engineer and there very well could be more technical reasons for main stream control boards to reside in the 12V-24V range. $\endgroup$ – Perplexed Dipole Aug 6 '19 at 21:32
  • $\begingroup$ Search EE.SE for a similar question about solar backup batteries. I believe there is something special about 36V which guarantees SELV compliance with lower risk than 48V. $\endgroup$ – Sean Houlihane Aug 9 '19 at 8:07
  • $\begingroup$ I found another reason. A lot of these boards use linear regulators. Coming down from 48V to 3v3 would produce quite a bit of heat. $\endgroup$ – user77232 Aug 9 '19 at 20:56

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