Max Output for Duet 2
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Hello,
I am building a custom 3D printer for work.
It has a duet 2 ethernet and duex 5 expansion. Moving nema 23 stepper motors on a gantry in Y Y' X and two Z motors moving the bed.
The issue I am having is that it seems that the duet 2 cannot handle the heated bed that i have selected based on the documentation. The bed is a Keenovo 300mm x 600mm at 24V 400W of power draw. It cannot heat up fast enough to reach temperature and faults out even during a tuning phase. There is also a voltage drop when the bed heater is active.
Did I select the wrong spec bed? I believe I need to now try to use an extra power supply and SSR to manage the bed. Can I monitor and control the bed heat using DWC?
Does anyone have any pictures or setup information. Other than the docs page?
https://docs.duet3d.com/User_manual/Connecting_hardware/Heaters_bedAny help would be great! Thanks
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@djthuma 400W is somewhat under-powered for that size bed, especially if it uses a thick aluminium plate. I would use an AC mains voltage bed heater for that size bed. My rule of thumb for heater power is 0.4W per square cm.
The trick to getting slow bed heaters to pass tuning is to use M307 to set a large dead time for that heater before tuning. Try D60.
