What combo of duet boards should I choose?
Hello, I'm new here and in this Reprapfirmware and Duet boards, until now I only worked with Marlin and other boards like Rumba, MKS, SKR, etc etc
My main objective here is that I'm designing a big 3D printer and I will use this hardware:
- X and Y axis with LS ES-M32320+ ES-D508 Stepper and motor drivers, 1 motor for each axis.
- Z axis will have 4 stepper motor Szruitech 57A3 with his drivers R60
- For extrusion I'll start with Bondtech QR, so it'll be a Nema 17 stepper motor.
In X and Y axis, stepper motors have encoder, so I must use the Leadshine drivers to make them work.
For Z axis I don't really need their drivers because they are not with encoder, the only need 4 A so if the chosen one is Duet 3 board I think they can be managed with the internal stepper motors, if not I'll use external drivers also.
And about the extrusion part, I've seen the Duet 3 tool board that would be the best option if it can be connected to the mainboard with only 1 cable, if I'm not mistaken.
Having said that... in the first time I was thinking in Duet 2 Wifi and Duet Expansion Breakout Board that I think it can manage all the external drivers, but I don't know if it's going to be better to control all the system with a Duet 3 and other expansion boards or not...
Any suggestions? Thank you
@Duncan Duet 3 MB6HC sounds right for this application. Connect the 4 Z motors to the Duet, and have a 1XD board for each of the X and Y motors. Then connect the extruder, hot end etc to the either to the Duet 3 mainboard (more cabling) or a tool board (less cabling). The tool board does need power, as well as CAN, so two cables.
You can do the same with a Duet 2 + Breakout Board, but there won't be enough outputs on the BOB (it supports 5 outpute) to run X, Y and 4x Z (all those motors will need external drivers; Duet 2 is limited to 2.4A), but you can connect 2 extra motors to the CONN_LCD port (see https://duet3d.dozuki.com/Wiki/Using_external_stepper_motor_drivers#Section_Overview). However, you'll most likely need 5V signalling, so you'll need extra circuitry to level shift the 3V signalling it provides. The extruder motor is about the only thing you can connect to the Duet stepper drivers directly!
So definitely easier on Duet 3, I'd say.
Thank you @droftarts for the suggestions.
About the LCD screen, the Panelduo 7" is the maximum size I can see in your site, if I want to use a bigger size... there're alternatives compatibles of other brands? or I should go to a Raspberry with other screen and connect by wifi to the DUET?
@Duncan PanelDue is the only option for a directly attached screen with the Duet 3 MB6HC; it doesn't have any outputs or support for other screens. If you want bigger, then yes, connecting a screen to an attached SBC would work. Or dedicate a cheap Android tablet to it, with both the Duet and the tablet connected via your network. Both of these last two options allow access to the full DuetWebConsole, rather than the stripped down functionality (but still very useful!) of the PanelDue.
There's always DueUI if you want a larger screen but still maintain a more control panel like interface.