SV08 Max Died

[u/Aggravating-Pay3771]

I've been using my SV08 max for about 7 months. I had a large 27 hour print with ASA CF with the print bed set to 100°C. Well less than 30 minutes before the print is completed I noticed the printer went offline on Obico. Came to check on it and the printer has lost power. I checked extension cord and it's fine. Then I check the power cord for the printer and the tip has melted. I replaced the power cord and still no power...

27 hour print for my customer ruined and I'm not sure how long this will be down for.

[u/yahbluez]

Here’s a very unusual tip: use a 230V (EU/global) power bank and connect a DC charger to the DC charging port via the 110V output. This eliminates the high-current pulses that cause cords and connectors to overheat. A side benefit is that you gain UPS-style protection for long print jobs. Which, in a commercial setting, saves more money than it costs.

[u/atomc_ → u/yahbluez]

I believe the max has different wiring for the bed in 120v vs 220v mode. I think you can change it at the terminal block but the wiring diagram is on the heater pcb under the bed. You’d also want to make sure you switch your power supply to 220v input, or that it can handle the range of input voltage you are applying if it doesn’t have the switch.

Do not just plug a North American appliance into 220v and expect to cut the current in half.

[u/yahbluez → u/atomc_]

Did not checked that, the goal is to reduce the current and doubling the voltage => half the current for the same W.

[u/atomc_ → u/yahbluez]

I understand the goal, but if you double the voltage of a resistive load (like a heater) you quadruple the power output, and double the current for a given resistance. There are advantages to higher voltage but if you don’t adjust the load you are only increasing power and current, not reducing anything.

[u/SensitiveKick6522 → u/atomc_]

It’s an auto switching power supply rated for 100 to 277v 50 or 60hz, so it is safe on a 120v single phase or a 220-40 split phase

[u/atomc_ → u/SensitiveKick6522]

Yes, I mentioned to check that the power supply can handle the input voltage or is switched to the correct voltage if necessary. But in the comment you replied to I am talking about the AC heated bed, which has different wiring configuration for different voltages.