@dc42 Five axis painting machine and foam milling machine, my senior work in college. Attached is an image and video of the plastic prototype making a test painting of line-based moves if you are interested (it still isn't working how I want it to but getting there).

Essentially it has a continuous rotation axis that rotates parallel to the z. So certain circular moves with the brush following tangent end up sending the head on an "unnecessary" rotation which is due to the IK sending it a G0 A1 when it is at position A355. All GCode being generated in python and rhino/grasshopper, and right now I have a post processor checking for this extra rotation and sending a G92 to set A to -5 before the above mentioned G0 Move. This creates delays in the movement and can get messy.

Duet 2 and rrf have been the key drivers behind this machine and amazing so far. Also built this thing on a cnc running duet 3. Very exited to have this continuous rotation feature now.

https://youtu.be/IkqkLaip2n0

Ok, I guess for my application I can just momentarily change the max speed of the machine to achieve a slow, shortest-distance move.
You don't think I could add the g1 functionality in a custom build? It is just that this new feature has eliminated the need for a post-processor that I wrote and it would be nice to fully eliminate the need for that. Or could it be just an option that is not default?

Thanks. Would it be possible to add an option in the 3.2 release for this to apply to g1 moves as well?

what is the nature of the continuous rotation feature you added? Does it actually do shortest-distance calculation or does it just remove limits?
Thanks

I keep getting this orange warning alert repeatedly during printing:
Warning: IP 12.12.12.13 requested file 'ocsp03-wwdr08/ME4wTK...' from HTTP server, possibly a virus attack
Any idea what is going on? I am using AP mode and am not connected to the internet. Printer ip is 12.12.12.12

@dc42
Hi David,
Would it be possible to have the current wcs and work coordinates available in the object model? This would really help those of us who are using the duets for cnc work and need to keep an eye on these values and or use them in conditional gcode.
Thanks,
Tristan

When cnc cutting with my duet 3 I encountered a problem when a command in the middle of my file tried to send the z axis farther than it's possible travel. The firmware returned an error and sent an M5 to shut off the spindle but continued to move according to the commands in the file.
This meant that I would have broken my cutter if I had not caught the issue in time. Can anyone think of a fix for this? Maybe i can disable the M5 sending or issue a pause command instead?
I am using reprapfirmware 3.01 rc10
Thanks

I'm looking to one of these: https://www.haydonkerkpittman.com/products/linear-actuators/dual-motion/size-17 with my duet3 system. I picked up three of them at a junk shop and am really exited to have finally found an application for one.
It is the single stack model and has 1.8 degree steps, essentially two normal nema 17 motors with one connected to a leadscrew.

I wanted to use sensorless homing because I don't have a need for super high accuracy in this part of my system and it would be a pain to run even more cabling.

So far everything is hooked up and I have sensorless homing working on the linear axis of the actuator.
The rotary axis however is proving to be very tough to set up, I think because it has no belt or screw reduction.

Here are two photos of my setup:

The idea is that the rotary axis will spin the grey disk with the holes until it hits the rod with the red tape sticking out of the collet as illustrated in picture 2. Having tried almost every combination of feedrate, accel, jerk, current reduction, filtering and stall sensitivity settings, and I cannot get the axis to return to the same point every time. This is probably due to the fact that 1 rotation of the disk= 200 full steps.

I am thinking that this may just be too much to ask from the stall detection on the duet 3.

Does anyone have any ideas? I would really prefer not to wire up a limit switch since my controller is 10 feet away from the router.

Thanks,
T

thanks @chrishamm
This fixed the issue.