Building an adaptable XL COREXY machine with 2023+ features

vectorinnovations

I’m planning a XL Build (1250 x 2500 x 1250mm) right now, and I would appreciate some direction.

I’m pursuing Duet3D, because I want a reliable, capable and expandable printer.

Because its so large, I’m going to run larger steppers, so external drivers (at least for the Z-Axis).

I wish to make this upgradeable, but I plan to start with 3 printer heads and a tool exchanger (up to five in the future). Basically, I want my own Prusa XL, but larger.
I want to add input shaping and eventually lidar.
I want a daughter board for each direct drive extruder.
I wish to add spaghetti sensing as well (I found a source for this).

Because of these requirements, I’m leaning to the 6XD. Can you please help me spec out the remaining components from Duet3D?

Luke'sLaboratory

@vectorinnovations

For that size I'd heavily recommend against corexy and recommend a "dual markforged" style gantry. It adds 1 motor (XYY) but will provide much more consistent behavior and give better performance in the end.

How many Z motors do you want?

If 3, Can do 6XD, (XYYZZZ) but might have to play it differently if doing quad z (or just add an extra 1XD for the extra motor)

for your toolboards, just run a canbus toolboard from duet. They're excellent. Don't run the SHT/whatever series as the cost savings doens't make sense when you are spending a few $100 on each print at the cheapest in filament.

For large printers, its especially important to have filament sensors. Get all of those per toolhead.

Duet is the best choice for this kind of system, for sure.

dc42

@vectorinnovations said in Building an adaptable XL COREXY machine with 2023+ features:

Because its so large, I’m going to run larger steppers, so external drivers (at least for the Z-Axis).

The Duet 3 6HC and expansion 3HD boards can provide up to 6.3A peak (4.5A RMS) and can use 48V supplies. So it's most unlikely that you will need to use external drivers if you are using stepper motors.

Luke'sLaboratory

@dc42 said in Building an adaptable XL COREXY machine with 2023+ features:

@vectorinnovations said in Building an adaptable XL COREXY machine with 2023+ features:

Because its so large, I’m going to run larger steppers, so external drivers (at least for the Z-Axis).

The Duet 3 6XD and expansion 3HD boards can provide up to 6.3A peak (4.5A RMS) and can use 48V supplies. So it's most unlikely that you will need to use external drivers if you are using stepper motors.

Absolutely agreed here - unless you're stepping up a tier to use FOC servos or something, the duets provide plenty of punch.

sebkritikel

I'd also vote for using the 6HC and 3HC and/or 1HCL (closed loop) expansions vs. external (non Duet product) drivers, unless you're 100% sure that you need stronger drivers than the 48V compatible, 6.3A peak setups the 6HC/3HC/1HCL offer.

vectorinnovations

@Luke-sLaboratory

Thanks!

I'm struggling a bit to know all the components I need to order (So I don't have to reorder).

Luke'sLaboratory

@vectorinnovations

No problem. Feel free to reach out if you have further questions. I have opinions for days

Luke

vectorinnovations

@Luke-sLaboratory Thanks