ok i took care of the problem......

i print 500C easily with a dyze hotend and extruder....works all day long

@engikeneer that happened to me, i did even worse and broke some of the solder points....but is no big deal the pinouts for the duet are well documented and the SDcard is SPI if i recall, so i just followed some traces to make the connection work again...just study the boards circuitry before you do anything else

well on the duet2 i swapped a wifi to ethernet and also the reserved (added wifi to Eth) and it worked just fine in both cases, you will just need to give up that SPI port I think , just use a decent wifi module like ESP12 with some external antenna and give it a shot, unless they went as far to the effort of removing wifi support native from RRF3

@dc42 RepRapFirmware for Duet 3 MB6HC version 3.01-RC5 running on Duet 3 MB6HC v0.6 or 1.0

the max retraction speed for the Dyze is 25mm/s , but i will try the other settings....i can always go higher than 25 but am sure will be clogging time

ok yup the M143 H0 P0 S150 did the job, all is well......RRF3 keeps playing tricks on me

wouldnt optical anything be a problem given we usually dont have printers in a super clean area? I mean mine isnt dirty, but sure not dust free....
my home water treatment system used an optical sensor for something (forgot what it was) but it used to go out like once every 6 months....it uses something else now.....

i have ran as high as 150C on my older Duet2 no problem, some materials like ABS need it and I have an A/C bed with SSR relay so it heats up pretty quick....where is the restriction coming from because in my config.g I have the line below, but it doesnt seem to care, it cuts off after 125C regardless.....do I need to move it to another heater output?

M308 S0 P"temp0" Y"thermistor" T100000 B4092 ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0 ; create bed heater output on out0 and map it to sensor 0
M143 H0 S150 ; set temperature limit for heater 0 to 150C
M307 H0 A450.2 C282.2 D6.3 S1.00 V0.0 B0
M140 H0 ; map heated bed to heater 0

i havent had an issue with running mine up to 150c and just a chinese sensor, i also have metal plate, glass, copper sheet and PEI and it does ok, printing ABS and other tough materials and the temp readings appear to be correct or I would be having issues

am having issue with stringing too with TPU....can someone clarify how to approach a setting for retraction speed? I know from past experience if I make my Dyze Xtruder retract too fast it will clog....