All right. Unfortunately I'd need 7 stepper drivers for proper testing, so i'll sit back and wait

All right. Unfortunately I'd need 7 stepper drivers for proper testing, so i'll sit back and wait

Any plans for the 3 stepper driver expansion board to be available for pre-order, too?

@dc42:

@Immutef:

So, in practice, I'd set all four heaters to my target temperature (e.g. 80°C) and the Duet takes care that each zone reaches 80°C and stays at it. I know the zones will affect each other, but in the end, the Duet will figure out which zone to heat, right?

That's correct. Currently you will need to send M140 P0 S80, M140 P1 S80, M140 P2 S80 and M140 P3 S80. Then M116 to wait for them all to reach temperature. M140 with no P parameter defaults to P0.

I am considering making a couple of changes:

1. Use M140 H0:2:3:4 to configure multiple bed heaters, instead of M140 P0 H0, M140 P1 H3 etc.

2. Make M140 Sxxx (also M190) with no P parameter set the temperature of all bed heaters. So the bed temperature commands generated by slicers would apply to all bed heaters by default.

These changes would also apply to the M141 command to configure and control chamber heaters.

Thoughts?

Exactly what I thought of as a final solution. Sounds awesome. In the meantime, I have no problem to set each heater to temperature, since I use Macros on my Duet to control hotend/heatbed temperature (I have macros for each filament I use, with settings for retraction, pressure advance, etc …) so I don't have to bother with the Slicer settings/profiles (Simplify3D). Maybe the DWC could have a third filament macro type, like "print", beside the "load" and "unload"

Will it be possible to add an additional thermistor to that heater combination? E.g. have a fifth one sitting in the center of the bed? Since the silicone heaters may have a different temperature than the actual build platform itself, that'd be handy to have the possibility to add more thermistor than heaters.

Thanks @chrishamm. I always forget the GCodes used are important whether a heater is a bed, hotend or chamber …

I explicitly use SSRs for my silicone heaters since I only use 230V/AC ones, so I won't do it any different in the future or with multiple heaters

So, in practice, I'd set all four heaters to my target temperature (e.g. 80°C) and the Duet takes care that each zone reaches 80°C and stays at it. I know the zones will affect each other, but in the end, the Duet will figure out which zone to heat, right?

How do i wire / configure multiple bed heaters? Are the wiki docs updated to reflect the feature?
I'd like to revive my idea of a zoned heatbed with 4 heaters/thermistors for a larger printer tho.

Hello,

is it possible to actually make use of multiple thermistors for a single tool, especially the heatbed?

I have a silicone heatmat with an integrated thermistor, which is bonded to an 8mm thick aluminium plate. I'd like to install thermistor on the aluminium plate, too, somewhere on an outermost corner, to actually read the temperature of the aluminium plate, and not only of the silicone mat. This way I can differentiate and tell how hot the mat and the plate are.

Similar to that I may want to use two thermistors for my hotend, since I'm going to install a watercooling - on thermistor (PT100) for the heatblock and maybe one for the water temperature.

At all the additional thermistors must not be usable in terms of gcode, but I'd like to be able to read them at least somewhere.

Best regards,
Pierre

Thanks again. Bad example, here you can see better that there are only four wires: https://www.ekwb.com/shop/ek-d5-pwm-g2-motor-12v-dc-pwm-pump-motor (use the image zoom on the first procuct picture). It looks like red/black is 12V DC and the blue/green are PWM.

Thanks for your reply. Most pumps have four wires, I guess two are 12V DC +/- and the other two are PWM? I won't use this but just for an example: https://www.ekwb.com/shop/ek-xtop-revo-d5-pwm-incl-sleeved-pump

Is it okay to connect 12V DC to the PSU (I have a 50W 12V DC/DC Step-Down PSU from MeanWell) and then two other wires to the Fan header then?

Hello,

is it possible to control a water pump with the fan control and especially with the virtual stuff introduced with 1.19? I am going to cool two E3Dv6 compatible custom coldends which perfectly fit B20 jacket with a water pump + radiator and would like to use the thermostatically stuff to switch it on and off. If its not possible I'm fine with having the pump always on.

Best regards,
Pierre

Really looking forward to a release! Love the idea to use a PCB directly as effector!