Well was hoping for some explanation on pull-up resistors but I guess you've run out of time. .....I suppose I can do research ony ownby bushpig7 - Firmware - Marlin
I'm willing to try just about anything.....I've got other problems that gave appeared with this printer and it would be good to have this one dealt with....kindly elaborate. Is this something I solder in place or are you talking about a firmware configure I see the pull-up settings in marlin. ....is this what you are talking about......never had to use that stuff before so I'm completely drawingby bushpig7 - Firmware - Marlin
"you need a custom bootloader that turns off the heaters first thing." thanks but from what I read, the arduino due's bootloader is burned in at the factory and cannot be easily changed. I don't read of anyone else having this issue so maybe i just have a bad board.perhaps you know how to program the bootloader on a due. everything i have found online says you cant change the bootloader. Theresby bushpig7 - Firmware - Marlin
hello I am hoping someone can help me with this issue. I have built a larger printer (320mm x320mm x330mm) i am running it with a smart ramps on an arduino due. the problem I am having is that the due hangs before totally loading marlin2. when this happens my hotend heater come on full and stays on until a reset. once mqrlin is fully loaded the hotend works fine, the same thing happens durinby bushpig7 - Firmware - Marlin
i agree with wildon....the board is done....i would also be looking at the power supply as its carrying the electrical load of all the affected components you mentioned. perhaps you were approaching the limit of what it could carry. your heater mosfet is probably fused "on" . After years of running a hotend they will eventually wear out, especially with 12v system because amperages are higher. iby bushpig7 - Reprappers
"Sounds like a thermistor open circuit. It should read low resistance" it seems to me that if it was an open circuit, it would change nothing when thermistor was unplugged. i would check for a short in the thermistor or its cablesby bushpig7 - Printing
hello This is my first time posting on this forum....hoping someone with more knowledge than me can help. I am building a large printer (320x320x330). i have been using a atmega 2560 and ramps 1.4 while waiting for a 32bit arduino due and smartramps. I am using drv8825 drivers. i had reasonable success with the 8bit controller but wanted the 32bit due so when it arrived i installed it right aby bushpig7 - Printing