Comment on Biqu B1 - Not heating the hotend
papalonian@lemmy.world 3 months agoYou don’t want to read the resistance of the heater. You want to find the voltage being sent to the heat cartridge.
When you’re able to, disconnect your heat cart and stick your multimeter probes in the socket (or touch the top of the cable screws), and heat the nozzle. Should read 24v IIRC. Based on your answer to my other comment, my assumption is the number will not change when you turn on the heater, implying board or mosfet failure.
Home, and done some measuring.
Old heater: 13,6 Ohm
New heater: 14,6 Ohm
So, no power to the nozzle heater. Now, how to verify the mosfet?
I will measure the voltage when I get back home later today. It probably will show no volts, so which board is defect? The little one in the hotend or the board on the other side of the USB-C cable? How to verify the mosfet? Image
so which board is defect? The little one in the hotend or the board on the other side of the USB-C cable?
My money is on the main board inside the printer. The “board” on your hotend (if it’s like others) doesn’t really have any computers or controllers on it, it’s more like a fancy cable connector between the main board and those components.
If you test the voltage and get nothing, it’s either the main board or the mosfet for the heater. If you test it and it gives you a stable 24v, the problem lies somewhere between the main board and the heat cartridge (cable, connector, the hotend board, cartridge itself).
#3 goes up to a board back on the printer. This board has multiple outlets, and one USB-C that goes up to the hotend.
Damage@feddit.it 3 months ago
You want to do both