zone heated bed

Jack-Jack

HEY!! guys I need some help.
I am new to duet and RepRapFirmware.
I need help setting up my BED
I have a dream to have two zones
as indicated in the picture
Uden titel.png

as a minimum I would like it to monitor zone 2 max temperature for temperature protection in case of Thermal Runaway.
and syncs the output to the BEDs so it looks like one.

ideally I would like the zones to be controlled individually so if I have to print small things that I can only turn on the Center and when.
I have to print large things use both circuits

and you don't have to worry about me using the output for the hotend to the ssr control I use a Toolboard for the hotend

OwenD

I would probably treat them as two different heaters.

Create a macro to define Zone 1 as you would any heated bed.
i.e. in M950 choose your output and sensor for that section.

Then have a macro that frees the pin and sensor used for zone one and redefines the entire bed (Zone 2) using two outputs and the sensor mounted to zone two.
You could define the sensor used on zone one and have max temps etc as well for added protection.

I think that should allow PID tuning as per normal for each zone, but of course zone 1 is going to "bleed" heat into zone 2, so overall accuracy will be reduced I guess.

I'm sure it's been done many times, so someone may have more info based on actual experience.