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https://forum.duet3d.com/topic/5909/guide-for-posting-requests-for-help
@bearer yes. maybe the board had to warm up. got me stumped. i have come across weirder things than that unfortunately.
Or you might have had a power brownout, like I did yesterday.
@zapta 14GA
check the resistance of the wiring. there might be a bad connection.
you check your thermistor with a know good temperature meter.
@jens55 thank you
your right. i ran a gcode print on small item cut the filament. it worked. thank you
@tdybare69 said in bltouch:
M305 P0 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 0 M305 P1 T100000 B4138 R4700 ; set thermistor + ADC parameters for heater 1
side note B4138 is the default and is most likely wrong for your thermistors.