What size wires go to the bed? 16Ga wires are not enough.
I used two 16ga and while it worked, it wasn't great. I switched to 14 and while it heated fast, it eventually killed the PSU because it drew more than the PSU could handle.
Which is the next issue, 20 amps may not be enough, I killed a few 20amp psu's this way.
4 motors = Nearly 4 amps
Hot end = More than 3 amps
Heated bed = 10-11 amps, some as high as 12 depending on resistance.
Fan = 1/3rd amp ea.
You still have to account for anything else needing power and the fact that China uses their own math for rating power supplies, which is usually about 20 (sometimes 50%) lower than rated, and that you shouldn't run a power supply at peak all the time.
Granted, not everything runs full power all the time, so 20 will get you going, it's not enough.
I used two 16ga and while it worked, it wasn't great. I switched to 14 and while it heated fast, it eventually killed the PSU because it drew more than the PSU could handle.
Which is the next issue, 20 amps may not be enough, I killed a few 20amp psu's this way.
4 motors = Nearly 4 amps
Hot end = More than 3 amps
Heated bed = 10-11 amps, some as high as 12 depending on resistance.
Fan = 1/3rd amp ea.
You still have to account for anything else needing power and the fact that China uses their own math for rating power supplies, which is usually about 20 (sometimes 50%) lower than rated, and that you shouldn't run a power supply at peak all the time.
Granted, not everything runs full power all the time, so 20 will get you going, it's not enough.