Disandavantages from 12V
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As already mentioned less torque from motors. On the other hand try to get your hands on 24V fans... With 12 you could just go and buy whatever is out there - eg. superquiet Noctua-fans.
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@kolja Why not to use 5V output for fans? Imho it is not a problem.
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@kolja said in Disandavantages from 12V:
As already mentioned less torque from motors. On the other hand try to get your hands on 24V fans... With 12 you could just go and buy whatever is out there - eg. superquiet Noctua-fans.
Just add a 12V step down for fans, you can easy connected it to duet V_FAN pin and have all fans running from 12V with a 24V supply.
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@briskspirit hell! yes - you're right. my printer came with 24. will have to check that.
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@dragonn i thought to go down this road.
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I'm running my CR-10 with Duet Wifi - with 15V
works good - fast heating
12v Fans working - using 80-90% pwm -
https://duet3d.dozuki.com/Wiki/Choosing_the_power_supply
https://duet3d.dozuki.com/Wiki/Choosing_a_bed_heater
https://duet3d.dozuki.com/Wiki/Choosing_and_connecting_stepper_motorsSome relevant topics discussing how 24v affects each.
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I use these to run fans, LEDs, etc. in my 24V powered printer. They seem to be reliable and they run cool. They're tiny and cheap!
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Not so much "showstopper" disadvantages for 12V, it is just that 24V is better at, well, everything but fans. And 5V is one jumper away for that...
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12V is adequate for small Cartesian printers. The advantages of 24V are:
- Easier to heat a large bed than 12V, because you get double the power for the same heater current
- Higher maximum speed, which can be useful for travel moves on deltas and on large printers
- The possibility to implement resume-after-power-fail.
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@dc42 How to choose threshold voltage for resume-after-power-fail ? Thanks
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I selected 22V as the threshold, and 23V as the restore. My PSU provides stable voltage (never dropping below 23.9V and never going over 24.5V).