Basic Information:
Printer Model: Neptune 4 Max
MCU / Printerboard: Manta M8P V2.0 + CB1
Host / SBC Mainsail
klippy.log (4.2 MB)
printer.cfg (16.2 KB)
Hello, i am (still) having trouble with my heatbed. Today i saw the temperature drop while it was warming up at 100%.
i already checked some cables and other stuff before. (check my older thread, if possible)
this is how i had it wired:
and now i wired it like this (using a MKS MOS25):
ignore the Neptune 4 Max board, that is my Manta M8P V2.0 atm.
the reason i am doing this is to figure out if the problem is in my motherboard or somewhere else. But as you may have already seen from the 2nd drawing, the MKS MOS25 needs an enable pin, i used one of the GPIO pins on my board. GPIO27 to be exact, and a connection to one of the GND pins on the GPIO section.
I found these 2 images and also read some threads:
these image outputs match and also match witht the colours on my Manta board so i assumed that these where te correct pinouts.
In the second image it is being said that for the CB1 you need to use the pinout after ‘_’. When i type GPIO27 it gives and error. so that seems correct. So i use PC12
But now when i try to heat my heatbed nothing happens. Did i do something wrong in the config?
the MKS MOS25 is getting 24V input power, but no ouptut when i tell it to turn on.
I am reading 1,4V from the enable pin when turned OFF and 1,4V when turned ON
