thank you
"..If you map two outputs to 1 heater then the single sensor will control both and the second sensor can be used as @jay_s_uk suggests..."
that sounds like a good starting point for me. Is it as simple as writing:
M308 S1 P"e0temp" Y"pt1000"
M950 H1 C"e0heat+e1heat" T1
to power booth cartridges synchronous from the sensor1 (T1) controller?
thank you
"..If you map two outputs to 1 heater then the single sensor will control both and the second sensor can be used as @jay_s_uk suggests..."
that sounds like a good starting point for me. Is it as simple as writing:
M308 S1 P"e0temp" Y"pt1000"
M950 H1 C"e0heat+e1heat" T1
to power booth cartridges synchronous from the sensor1 (T1) controller?
Re: Backup thermistor and Dual Heater Cartridges
Hello - actually there are more and more heater blocks available with support for dual heater cartridges and dual pt100 (or other thermistor) slots.
One example is the mosquitto plus, designed for two 50W heater elements and two pt1000.
I was wondering, that the firmware of the duet3d has no valid workaround for powering these cartridges from the two heater ports of the Duet2Ethernet. The PWM for booth MOSFets could be driven from the output of a single PID controller. The temperature from one PT1000 for controlling could be enough and the second could PT1000 could be used for safety e.g. the inputs are not allowed to differ more than X degree...
I am not a specialist in commissioning the duet3d hardware, but after a short research of the possibilities offered by the manual and the wiki I think there is no solution for running two MOSFet channels in parallel.
Physically I can connect booth cartridges in parallel, giving me a resistance of 6 Ohm - so 4Amps @24VDC should be OK for that type of transistor - but perhaps there is another solution or a road-map for a future release maybe implementing this feature..?!
Kind regards