How does the voltage on the 24V supply look when you power up the printer? Does that monster supply need a minimum current to help it keep the power regulated and clean? (Some of the ATX supplies need 0.1A.) How clean is the output?
I just went 24V myself two weeks ago. The 300mm diameter Onyx heatbed on my printer was taking 40+ minutes to reach 110C on 12V - even with an external SSR. Several people on the SeeMeCNC forum went with 24V Mean Well power supplies, and dialed back the voltage adjuster to 18-19V. The Onyx can now reach 110C in 6 minutes on the 19V that I'm feeding it, and the 12V/20A buck converter that I bought from Amazon put out a steady 12.0V for the electronics/steppers/hotend with the 19V input power. I haven't switched the Azteeg's 5V source back from USB to on-board power to see if the new power supply helped with the GLCD gibberish on boot, but otherwise I am kicking myself for not going 24V sooner.....
I just went 24V myself two weeks ago. The 300mm diameter Onyx heatbed on my printer was taking 40+ minutes to reach 110C on 12V - even with an external SSR. Several people on the SeeMeCNC forum went with 24V Mean Well power supplies, and dialed back the voltage adjuster to 18-19V. The Onyx can now reach 110C in 6 minutes on the 19V that I'm feeding it, and the 12V/20A buck converter that I bought from Amazon put out a steady 12.0V for the electronics/steppers/hotend with the 19V input power. I haven't switched the Azteeg's 5V source back from USB to on-board power to see if the new power supply helped with the GLCD gibberish on boot, but otherwise I am kicking myself for not going 24V sooner.....