Hey @dc42,
Currently I removed +5V from dedicated PCI-Ex to USB adapter for Duet 3 Main Board 6XD and the system is working as intended.
When I catch some time I will investigate the option with daemon.g and VIN power monitoring so that this external modification is not needed.
Thank you,
Cheers Ian,
That works as intended, but unfortunately, it is not "bulletproof" as much as I hoped so.
In case Main switch is powered off, extension boards lose power but Duet 3 Main Board 6XD still has power from USB meaning extension boards drop the CAN connection, and powering up the main switch from the enclosure will not re-initialize the config.g to sync extension boards.
It seems to me I will need to cut/remove the USB power, or make some constant monitoring loop.
Thank you,
@droftarts
Hi Ian,
I have 4 separate PCI-E to USB controllers connected to MB, one is like 8Eur and one of them is only dedicated to Duet, so removing 5V regulator from a single card is not an issue.
I tried to modify the config.g with boards[0].vIn.current, but I end up in some kind of a loop, need to investigate that approach in more detail.
Thank you,
Hello Ian,
Thank you for the replay,
I do not need to communicate with the system when the main power is off.
It was also my idea to modify the cable as you mentioned or to remove the +5V regulator from PCI-E which is used only for Duet 3 Main Board 6XD.
I will investigate if I can implement it with boards[0].vIn.current, thanks for the tip!
Hello David, thank you for the replay.
In that case, I would need to use one gpIn[1].value as a "sensor" where I connect +24V to detect its presence, right? Or is there some other elegant solution?
Or is it better to do it over daemon.g and config.g together and to implement some kind of continuous monitoring?
Thank you,
Hello,
I am trying to find the best Power-On sequence for my PnP machine.
I have an enclosure with complete electronics where the Duet 3 Main Board 6XD and Duet 3 Mini 5+ are. From the enclosure to the head of the machine, I run the +24V and CAN-FD lines for two Duet 3 Expansion Board 3HC-s.
The computer on which the complete machine runs is outside of the enclosure, and I run the USB cable through the panel connector to the Duet 3 Main Board 6XD, and also the LAN.
The problem I am facing is that if I Power on the computer first, the USB will power Duet 3 Main Board 6XD, and when I activate the Main Switch located on the enclosure, power will be delivered to servo drives and +24V PSU which delivers power to Duet 3 Mini 5+ and two Duet 3 Expansion Board 3HC-s in the head of the machine. In this sequence, all three boards do not initialize properly, I need to run M999 in DWC then everything is ok, all boards are synchronized perfectly and the machine is working as it should.
Option two is, when the computer is turned off and there is no power over USB, I activate the Main Switch on the enclosure to power up the servo drives and +24PSU, all Duet boards power on inside of the enclosure and in the head of the machine in the same time then I turn on the computer and I can see all boards are connected/synced successfully.
Is there a way to combat this, for example using only data cable for USB (without +5V) or something else so that if the computer is powered on first I do not have an issue if the +24V is powered on after, what would be the best approach to this?
Thank you,
@Zseven Hi,
It is a bit messy as all of it is outside of the encolure now, there are two resistors, one for STEP and one for DIR, I soldered them on the wire terminals and insert them in a connector, you will need to put some shrinking tube so that you don't short the pins/wires.
@dc42 Hi,
I received Duet 3 Mini5+ and Duet 3 Mini 2+, I managed to get it working without any issues for now, first I was super scared as the conveyor width stepper was making super weird noise then I researched a bit and found out that I needed this:
M569 P05.0 D3 H50 v50 S0; Conveyor_Width
M915 P05.0 T50
After adjustment, the motor is working well, no more weird noises, now I need to finish 3 "Zones" of the conveyor, and sensors and put all the electronics in the Industrial enclosure, this should all be easy. 
https://www.youtube.com/watch?v=PELvjKmPtk0&feature=youtu.be
This combination of Duet 3 Mini5+,Duet 3 Mini 2+,6XD and 2x3HCs, was a super nice decision, thank you.
Zdenko,
@dc42 Hi!
Ok, will place an order for the additional Duet HW, hopefully I will manage all connections without any issues.
Thank you,
@dc42 Hi,
Thank you, that makes sense, it would be the best solution, all would be integrated into the Duet3 Eco system, no external drivers would be required, space in an enclosure will be saved, and no additional wiring would be needed.
When it comes to connecting Duet 3 Mini 5+ with the rest of the Duet3 hardware in my case with 6XD and 2 pieces of 3HCs, to connect it on the CAN-FD line I would only need a short "stub" for CAN-FD and configure the Duet 3 Mini 5 config.g with M954 and set the CAN-FD ID, all other is then configured in 6XD config.g right?
As I have motors that are working in parallel, in config.g, drivers should have the same "letter of axis" assigned to Drivers that are moving at the same time, is that correct?
@dc42 Hi!
6pcs - Nema 17 26Ncm(36.82oz.in) 1.2A 42x42x30mm
1pc - Dual Shaft Nema 17 Nominal Voltage: 4.83V 1.5A 42x42x60mm