Hi!
I have a 750W 24V 30amp Power supply supplying 24V to an Azteeg X3 Pro controller and subsequently to the 24V Onyx hotbed?
I can also reconfigure to supply up to 30V 20AMP directly to the hotbed(s), I have two hotbed outputs I could use. I removed my
12V Onyx hotbed. I have an SSR-100DD and 24Vto12V Step-downs. What's the best way to use these in my setup or reconfigure
to heat up my 24V Onyx hotbed the fastest?
Thanks, Rod
On my setup... I've a got a current limiting MeanWell supply that connects to an SSR for the bed and to a 24v>12v step down that powers everything else.
You can run many control boards on higher voltages (not sure about the azteeg) but then you've got to make sure that your fans and LEDs are ok running on that voltage. It would also change the current going to your steppers.
So, you have a 24V current limiting power supply connected to an SSR and then to a 12V or 24V bed? And you have 24V coming from your power supply and going into a 24Vto12V step-down that goes to your controller to power everything else, hot ends, LED Light ring, and fans which are all 12V, Correct?
OK so what I've done is this. I went with all I could at 24V and used the 24Vto12V step-down for the things I couldn't, namely a 12V LED light ring and 12V water pump.
I now have 24V Power supply, Hot-end heater cartridges, a 24V hotbed and 24V fans.
The Power supply is rated at 24V 30 AMPs.
The Axteeg X3 Pro controller allows you to either choice (1) use the Main Supply Input [1] for everything 5-30V 30 amp max or choice (2) supply power to components separately to input [1] for the hot ends, LED lights and fans, Input [2] for the hot beds and Input [3] for the motors and stepper drivers. Each rated at 5-30V, 10Amp.
I decided to go with choice 1, because I have 24V accessories for all components controlled by the controller hot ends, fans and hot bed. Then I have 24V coming into a 24-12Volt step-down from power supply and (2) lighted switches mounted on my LED display bay door to manually switch power on/off for the light and water pump.
The one thing that isn't obvious, is whether the motor are 12 or 24V. I can find the amp max for the motors, in my case 2.5 on my AXIS and Extruder 1 motors, and 1.5amp max on my extruder 2-4 motors. The controllers and stepper drivers allow me to see a voltage reference and a set screw for adjusting the amperage. So I was inclined to go with the 24V from choice 1 and adjust or limit the amps accordingly.
What I hear you recommending then, is for me to go with choice 2 and use a 24-12volt step-down to provide 12V power to Input 3 for the stepper drivers given the motors that come with the Rostock max... Correct?, thanks
Cobaltrod wrote:So, you have a 24V current limiting power supply connected to an SSR and then to a 12V or 24V bed? And you have 24V coming from your power supply and going into a 24Vto12V step-down that goes to your controller to power everything else, hot ends, LED Light ring, and fans which are all 12V, Correct?
Correct. I've got the 24v through the SSR connected to my R3 Onyx bed. The only thing that's different (and doesn't even really need to be changed) is the LED resistor on the heat indicator.
The 12v converter powers everything else, the hot-end too. The original bed heat output is now the 'trigger' for the SSR.
The motors can generally handle higher voltages than they're rated for. They're driven by pulses, not continuous DC.
I did the same as Jimustanguitar did. I went with the Meanwell 500W 24V power supply. The high end SSR (Which ever brand and model Nightwatchman used) and I went to 12AWG high temp/high flex wire to the heat bed. I also did the 24v to 12V for everything else. It heats up super fast and works like a charm. I have found the fan on the Meanwell 500W supply to be noticeable, but not really "bad" I mean i hear it, but it is not loud... At least not to me. The stock RAMBO fan annoyed me far worse with sound then the Meanwell does. I have heard the 700W supplies are bad for fan noise. That is one reason I went with the 500W one instead. I just turned it don to 20V and it has been great! But fan not for my supply has not been an issue for me. By the time the E3d and and the layer fan kick on, the supply fan is drowned out for me it seems.
http://713maker.com/ Custom aluminum and carbon fiber hot end mounts for the Rostock Max and Orion.
Ya, there's no getting around the fan noise of the 700w power supply. I decided to keep the ps external to base, so mine sits behind a file cabinet which muffle the fan noise some, And I have a water resorvoir where the old ps was mounted in the base.
Hi!
