I'm wondering whether anyone made progress on this topic, connecting a Smart Orbiter 3 to a Duet board. I have a Duet3 MB6HS and am trying to with up the SO3 to it. Specifically, I'm trying to connect the filament sensor and LED. I've got it wired up to IO4, with the yellow/LED being on IO4.out, and brown/filament-sensing being on io4.in. I've got blue/GND and red/+5v wired up to the corresponding pins on IO4 as well. I'm not getting anything from the LED, and the voltage change on the filament sensor doesn't make any sense either. I'm using a multimeter to measure IO4.in to GND, but the voltage change is only 0.1V when I put filament in. Anyone have any thoughts on this?

@whosrdaddy:

Get a fan from a well known brand. I use Sunon and Ebm-Papst Fans.
On my Aero extruders I use the 414F/2 model from Papst.

I may be missing something, but that seems to be an axial fan. The issue Jason and I are having is finding a 24v blower fan.

I second this request. I can find loads of cheap, and expensive, 24v blowers, but none seem to be designed to run quietly with the Duets PWM setup. The best I've found is a fan from Mechatronics (B5015E24B-BSR ), but it does make a lot of electronic noise below 100%.

No rush, it's not loud enough to be an issue, it's just something that I noticed and wanted to confirm the source of. Is this a benign issue, or is there a risk of damage to the drivers/motors?

I'm experiencing a similar issue, where it sounds like, very quiet, white noise coming from both my x and y stepper motors. Is there a recommended process for figuring out which parameters to change, and by how much; or is it going to be a trial and error process?

David,

Thank you for responding so quickly. I'd like to clarify something regarding your first answer.

@dc42:

No, because the WiFi module uses a dedicated high speed SPI bus that isn't available on the expansion connector. That high speed bus is needed to get good file upload speeds.

Does the ethernet-daughterboard also require the high-speed bus, or would the expansion bus support it?

I'm about to buy a duet and, based on the discussions on the forum, I have a question or two regarding ethernet vs wifi. I'd like to have the option to go with either, and I realize that there's not an option for that right now. It seems to me that it would be easier/more-stable to get the wifi from the ethernet version than the other way around; I can always plug the ethernet cable into a wifi extender. Would it be possible to add make an ethernet add-on board which would work via the expansion header? Someone on another thread mentioned that the Ethernet-daughterboard works via SPI, and I thought that I saw extra SPI pins available on the header.

Alternatively, what would be involved in creating a wifi-daughterboard? If it's just a question of mounting an ESP8266 to a PCB with the correct headers, I can probably manage that.