I've been running my 4 tool tool changer with tool boards for a couple months now, but all of the sudden my T2 and T3 have stopped communicating. Here's a video showing their behavior:
https://drive.google.com/file/d/1gdnn7rptLo2T8xNn0wRhWpLh7z5Vm8u_/view?usp=sharing
As you can see, the first 2 tools, T0 and T1, have slow blinking red lights in sync with the main board. However, T2 and T3 have rapidly blinking red lights, and their hotend fans are both turned on, both of these states indicate the absence of communication between the tool boards and the Duet 3.
I am running a tool distro board, and have checked all 8 CAN wires for continuity from end to end and they're all fine.

I raised my xy accelerations to 6000 and my E accelerations to 12000 i believe. Still getting funky results.

The relevant part:

M84 S120 					    					  ; Set idle timeout
M203 X18000 Y18000 Z800 C5000 E5000:5000:5000:5000	  ; Set maximum speeds (mm/min); Maximum speeds (mm/min)
M201 X2000 Y2000 Z180 C500 E6000:6000:6000:6000	  	  ; Absolute Max Accelerations (mm/s^2)
M204 P1500 T2000									  ; Max Print and Travel Accelerations
M205 X6 Y6 Z3 E12:12:12:12 C1.5						  ; Maximum jerk speeds mm/sec
M593 F38 L180										  ; DAA

I had been chasing down some ringing artifacts on my custom tool changer and after playing with acceleration and jerk settings to no avail, I gave Dynamic Acceleration Adjustment a try. Printing a single test cube I found that M953 F38 reduced my artifacts tremendously.

The obvious next step was a multi material print. After a few layers I paused the print and noticed my extrusions were all messed up. The solid infill looked way under extruded, and it seemed like the perimeters on the first few layers were over extruded.

I played around with extrusion multipliers, extrusion temperatures, extrusion widths, extruder acceleration and jerk settings, all the normal stuff...

I was lost until a community member mentioned DAA, and I immediately commented out DAA and did my test prints again.

It looked perfect, but more investigation was needed.

I did many tests, and have shown 4 of them below. Each print consisted of 2 40mm squares only 0.80mm tall printed on separate extruders and about 5mm apart. The pictures are only of 1 of the 2 squares printed in each test, the others are red and don't show the artifacts as easily. Print speeds were around 25mm/s with 1 perimeter and 10% infill overlap.

The changes between them are self explanatory on the sheet.

It seems to me like DAA is affecting the behavior of my extruder, but I am not sure. Prints without DAA are clearly better, in terms of this issue, than those with it turned on.

Any ideas or suggestions would be greatly appreciated.

(Hemera direct drive tools set up without any weird settings)
(Running a Duet 3 FW 3.1.1 and Tool Boards with FW 3.1.1)

With Q600 I get motion between 45 and 100, although the servo range of motion is only about 60 degrees. This is good enough for me. With this setup I make 45% my "open valve (low pressure)" and 100% my "closed valve (high pressure)"

I have tried values between 50 and 900, and none of them give me linear control from 0 to 100. Interestingly, though, as the numbers got higher (towards 700-900) the control became much more fine, although the range of motion decreased

Currently playing with Q values in M950

@T3P3Tony said in Clipping Servo Range on Duet 3:

@KevinMar not without modifying DWC to send a different M106 Sxx number for a different range, depending on your familiarity with web development this may or may not be simple to od. I think there is a potential argument to make the fan slider %s configurable in DWC though for a more general use case where fans only operate with PWM within a limited range. @chrishamm can you add this to the DWC wishlist please.

Sorry I wasn't clear about this, but I was only using DWC for testing. I am more concerned with how it would run during a print using normal fan commands.

I'm modifying my printer to use air pump cooling. A servo will be used to control the pressure of the air flow.
I have a simple 9g RC servo plugged into the servo port on my Duet 3, with it configured as follows:
; Fans for print cooling
M950 F0 C"0.out9"
M106 P0 C"PrintCool"

When I try to adjust the servo angle using the fan slider in DWC, the servo only moves between the values of 20 and 55. Through these 35 points, the servo moves approximately its entire range.
Is there a way I can clip the range to 20-55? So that at "0" the output is 20, and at "100" the output is 55?

Thanks for any assistance!

I’m trying to start my first print on a new machine. This is not my first Duet machine, but my first Duet 3.
Everything is working very well when controlled through the DWC, but I cannot get a job to run.
I am using prusaslicer and if I include preheating gcodes within my start gcode those work fine and the hotend and bed heat up.
However any other actions do not work. I’ve tried G28, G32, G1 moves...
Even if I create a blank .gcode file which only contains “G28” it will not initiate G28.
All of these commands, G28, G32, G1 moves, all work perfectly from the console but nothing happens when initiated in .gcode.