1HCL compatibility question
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@ironhydroxide we've considered this in the past and I'll take another look at it. To keep costs reasonable we'd probably need to specify a maximum VIN voltage of 36V rather than 48V. Would that be OK for you?
Duet WiFi hardware designer and firmware engineer
Please do not ask me for Duet support via PM or email, use the forum
http://www.escher3d.com, https://miscsolutions.wordpress.com -
@ironhydroxide @dc42
I just did this. Just for my pnp set up to get ride of the MKS Servo42D. Basically 1HCL + mag board wo any io
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@dc42 I believe it would. Current controller is on ancient stepper drivers at ~38vdc, I can't see newer drivers at slightly lower voltage being any worse, and likely better.
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@wayneosdias
If that is what I think, it looks very much like what I'm looking for.
Have you already made these boards? how tall are the components on them? (I have minimal back clearance, would like to not have to go to a shorter motor if possible) -
@ironhydroxide Hey Iron, This will be a Nema17 mounted Duet 1HCL + Duet Magnet board without any gpio. Im keeping all the original 1HCL Duet peripheral pin assignments, just not using all of them to speed up the process.
This will be my 2nd Custom Duet Expansion. The First go around I added accelerometer, 2 addl drivers and messed around w the pin assignments. It all works great but took a couple weeks to get right. I think the above should work as intended much quicker by not going off script with pin/peripheral assignments. I just don't have time to keep the machine down, I use it for production.
I always order a couple boards. Once I get one built and confirm fxn I can send you a spare pcb if your in the states. In keeping w Duet opensource Ill make all dev files available if you feel like using the design on some level. Keep in mind some of my apparently odd part choices are based on what I have on hand, like the full reel of dual channel Vregs my company is not going to use...
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@wayneosdias that sounds like it would work for me very well.
My only hesitation on it, as said before, is the thickness of the populated board.Part of that I can mitigate by soldering connector leads to the board, and having the connectors next to the motor instead of directly behind it, but if you use the same capacitors as the 1HCL, that kinda makes it difficult. those are pretty tall.
It also looks like you're only going 24v and 3.3v?
Is there any chance of there being space for a 5v regulator and some (pie in the sky) selector solder pads with resistor divider for the Encoder power/input?Please don't take this as criticism. I appreciate greatly your willingness to share this board, and would gladly test it with my setup.
If I can get this proof of concept working/approved, and you're interested, my company is likely to be needing 250-300 of them to retrofit all of our current equipment.
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@ironhydroxide
Hi Iron,Interesting offer, but I simply don't have the bandwidth to take on such a project or attempt to support it. With the qty you're looking at, Duet and or possibly a sub-contractor would be your best bet. That said, sounds like your design criteria would be fairly easy to meet, but one off propriety in nature. You need to get a design engineering quote, maybe the folks at Duet could point you in the right direction.
That said I'm just throwing my design out there to share w the community. I didn't put out the full schematic, heres the supply side of things, 24V 5V 3v3. Fyi the pic of the pcb i posted above was a first pass I did in a couple of hrs. Im sure its going to change after some more DRC checks. Ill prolly order the board Monday. Its simply to illustrate the Duet control accessory scheme is flexible enough to meet what it is you're proposing, even with some of your physical design constraints.
I am editing this post by removing the V supply schematic. The schematic was pulled from a different design and not fully reviewed for use in this case. Upon review the circuit needs to be reworked and not acceptable as initially posted.
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@wayneosdias Completely understand on not having the desire to take a custom project on.
I'm glad there are people like you who are willing to help out, and also give their designs out for the community.I'll look more into the Duet solution and hope that something can come of that. At the moment i'm in the proof of concept phase. but it's looking very hopeful, Duet is a lot more flexible than I imagined before looking into it in earnest.
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Well it's really a testament to David, Duet and the Moderators. I wouldn't even know where to start without them. Mechatronics isn't my thing even though I rely on 4 one-off purpose-built machines for my business. I can just scheme general design concepts and leverage the Duet system to meet the control needs.
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@ironhydroxide @wayneosdias this sort of board has been on the hardware roadmap for me for a while.
What clearance do you have at the back of your motors @ironhydroxide ?
