Posts made by kenavn

The sensor was not OK. Replacing it solved the issue. Thanks for the support.

@kenavn said in Hall Effect sensor 24v on Duet 3:

Riko SN04-N

Hi,

It's NPN NO (normally open). Have a look; https://www.aliexpress.com/item/32613205352.html. So yes, you are right. They should be floating when not active, and give active low on detection.

The strange thing is that it seemed to behave differently. I've probably been sloppy in the testing. I have to check the wiring again

I am installing a Duet 3 on my CNC, and I have planned to use separate hall effect sensors for squaring on my two Y axis (separate motors). I have two 10-30v hall effect sensors in my drawer. I tried testing them with 24v input, and it gives me +24v back on activation (NPN). They are Riko SN04-N.

I was hoping that the flexible GPIO hw on Duet 3 would accept them, and can read that the hw supports up to 30v in on the gpio ports. Would this work? Can the Duet read the 24v input on activation, or do I need to hook up other sensors/circuits to facilitate?

@Danal Yes, there are price differences there. But if you compare the Nano to a NUC or something more than an ARM Cortex, you will have a larger price difference in the opposite direction. And a NUC would not as an example bring any FLOPS to the table - neither would the Raspi. The question is if a GPU would make a whole lot of difference in relation to the general "wait times" of the machine itself, and how big a part of the cake relates to the camera and lighting setup. But I guess it is a discussion already started elsewhere, and not typically right for the Duet forum (I know there is at least one individual thas has mentioned he is looking into the Duet/Jetson/OpenPNP combo as of Q4 2019).

But this is definetly an area I want to learn more. What remains unclear for me is the potential in the RPI GPIO ports of the Duet 3. But I have one in my shop as we speak, so I will look into it at some point. It looks like it has its future staked out as a part time tinkering board in regards to the GPIO-port and part time CNC controller for my custom OX^2 Metal.

@dc42 I sent you a PM regarding the Duet 2 It would be a great start to the PNP project, thank you.

@dc42 When it comes to OpenPNP one of the really interesting areas as I see it is the CV-functionality. One of the reasons why I am building this now is that I want to get to the point where I can start exploring the state of OpenPNP in regards to running it on a Nvidia Jetson Nano. The Nano has a Raspi compatible GPIO pinout. A "package" with well integrated Duet3d hardware with a Nvidia module and Linux with OpenPNP sounds like a really snappy combo.. Would that not be a use case more applicable for the Duet 3? I do not know the specifics and possibilities in the GPIO-support on the Duet 3, so please excuse me if I am totally off

After following the community for a while my current assumption is that the processing pipeline required for the computer vision is a bit demanding for a Raspberry Pi. The Raspberry Pi 4 has of course more potential, but I was thinking about trying out a Nvidia Jetson Nano (GPU) that has Raspi GPIO. That would further enhance the CV capabilities. But - this is an area I need to discover and I can pretty much do that discovery without more than a test installation of OpenPNP and the Nano itself.

I would be very interested in a Duet 2 for my PNP, absolutely. I'll msg you. Thanks!

@Danal Personal stories are more interesting that unpersonal ones, so no warning required I am happy for your recovery, living a life with loved ones AND interesting machines are so much better than the alternative. Bad customers though..

I challenge you. Sell the LP, build a new one, and let the show begin! There are actually a few interesting variants to see over at Hackaday if you poke around a bit. But I ended up on this one. My first idea after gaining enough confidence on two previous machine builds was to do this from scratch. But the cost involved is just a factor that makes we want to stick to a proven route, and then just modify and make my own derivate over time.

I am pretty confident that the Duet is a good platform for this, but I guess it might need some adaption.. Currently OpenPNP seems to be the software route to go. The fact that it expects an "old-fashioned" USB interface to work, and it relies on its own computer-vision logic makes this a bit more "dynamic" then what the Duet is built for. In other words; what could we use the Duet web-interface for when it comes to pnp? As of now it is probably limited to basic movement and homing, and no "runs" pr. se. I might be wrong, but I guess it takes som tinkering to find out.

@Danal Hehe, it surely is! But I guess there are worse addictions out there. Despite of not seing me much on evenings, my wife must also agree to that Why did you not use it? Why not start a small scale production business for the hungry makers out there?

@Danal Hello! Yes, I have researched a bit and I have also looked at the Liteplacer. Looks very nice! I'm just a bit more exploring, and want to start more "on scratch". Not that I actually will go all that way, but I have decided to base it on a Openbuilds frame like I have done with my delta and my CNC. So I have started out with the cartesian pnp from Anthony Webb (https://hackaday.io/project/9319-diy-pick-and-place), but started to customise it a bit in regards to both toolheads, bed, size, electonics mount etc.

I am planning on putting some Youtube-videos out on my CNC-life, as it is consuming more and more of my spare time I will announce when ready, if you are specially interested.

@dc42 Thank you! I've started the mechanical build, and it is progressing good this far. I also have a Duet Wifi running on my large delta 3d-printer, which I have been very happy with.

What happened last week is that some parts broke on my CNC machine, and I decided to do some upgrades to that machine as well (OB Ox metal derivate). I just bought the new Duet 3 for my PnP, but now I am considering using it on my CNC instead, as I would benefit for the possibility of auto squaring the Y-axis and improving the overall availability through ethernet etc. I cannot achieve this with my current xpro board.

One of the reasons for me being unsure on using the Duet 3 for my PnP is something that you mentioned over at the OpenPNP mail-list (i guess dc42 @ pnp is you.. Pure guesswork). You indicated that the Duet 3 might be "overkill" for the PnP usage. Would you please elaborate a bit on that, so that I better understand what you are aiming at?

If I would go ahead an plunge into ordering my third Duet, I will very much want to start off with the right feeling and more than hopeful dreams..

Yes, that is also what they argue on their web page. At the same time they highly recommend Smoothieboards. They actually "push" it quite hard. My main question would be: What does Smoothieboard bring to the table that the Duet does not for the use-case OpenPNP?

Hi! After being a happy Duet3D delta-printer user for a few years, I am exploring new territories. I am looking into pick'n place machine based on OpenPNP (picking and placing surface mounted components on PCB boards).

One of the core decisions to make is obviously what controller board to purchase. OpenPNP recommends Smoothieboard. I absolutely want to try out the Duet 3! Has anyone tried out using the Duet for this purpose? More information on controller requirements are here.

Anyone?

Thanks, I will change the motors later on then.
Right now I have successfully switched out the MKS board with the Duet Ethernet.
I am amazed.. Truly. It went from a monster to being a kitten; I can sit in the same room as the printer and its sound level is like 50% of what it was. The auto leveling works fantastically, the UI makes it a treat to work with both settings and daily tasks.. Wow! Fabulous engineering! And the switch took me a few hours thanks to Emulsifide's pioneering and good Duet documentation in general. Can't get better.

Thanks again for sharing this.

I've received my Duet Ethernet, and I am actually also waiting for some .9 steppers for the XYZ. I am a bit unsure though, on the necessity of replacing the stock 1.8 motors.. Will this actually be worth the hazzle? As I understand from the Duet documentation, the .9 ones are recommended to increase the torque on micro stepping these axes on deltas, but is there a strict need for it on the LM? Will a replacement actually give me better results down the line compared to the stock ones? (3d-hw-mod-newbie-alert)

I'm also eager to see the details on this after pulling my hair out of pure frustration over the original controller.. There wouldn't be any show stoppers in regards to only switching the controller, but keeping the original extruder and volcano?