After upgrading my 3d printer, I think I fried the mainboard. I upgraded my anet a8 with these modifications: 1. 30a power supply with printed psu cover to mount a fused switch 2. 2 Mosfets for each of the heat sources, hot bed and hot end 3. A fan to mount to a printed mainboard cover wired directly to power supply 4. E3d v6 hot end with fan wired directly to power supply 5. Remote extruder with motor mounted to the top right bracket 6. Both original fans that came with the a8 are wired to the mainboard in stock configuration, which is why I wired the aforementioned upgrade fans directly to the psu 7. Upgraded metal cylinder shaped proximity sensor to replace tronxy sensor that I was using initially After I installed all of this, it turned on fine and showed the skynet firmware, so I figured it would be good to test the preheat function as I figured it was a good next test to see if all was functioning correctly, when I touched the button to preheat pla, it turned off instantly. I have verified that the psu is working fine and have plugged it in and connected it to a fan and it runs it fine. I’m assuming that the mainboard is fried. I don’t understand how this happened as I thought I was relieving stress on the mainboard with the mosfets and added fan. Everything is wired correctly to the mosfets, signal connection to mainboard, psu connection to dc ±, and wired to hotbed and hotend from the remaining terminals that say hot bed. Is it just a fuse on the board that needs to be replaced, or should I start looking at different options? Is it time to go to the RAMPS1.4 setup? If so, can I get some help with choosing the parts that I will need to enable the RAMPS1.4 card to work properly? Do I need to get the RAMPS1.4 card and a mega 2650? One option that I see is this: [Discontinued] SainSmart 2-in-1 RAMPs 1.4 Controller Board for 3D Prin – SainSmart.com Will this be the best option? Is this better than getting the ramps1.4 and mega 2650 option?
I unplugged everything on the main board and it turns on and runs fine, but for some reason the hot end is staying on and constantly heating the hot end regardless of if I press cool down or try to turn it off with a host program.
Hi.
are the temp sensors working ?
on temp error the board makes an emergency shutdown
Is this test with its original configuration, or is this with the mosfet still on it?
I would stay away from RAMPS 1.4V. I have help make 300 printers using the RAMPS board, and they don’t last long (aka thermal event on the MOSFET for the heatbed). Azteeg boards are pretty good. I have used personally Azteeg x3 (an older board, but still going after 6 years).
