One quick thing you could try is to isolate the PSU ground from the mains earth connection, other th

One quick thing you could try is to isolate the PSU ground from the mains earth connection, other than that I'm baffled. Looked the code, USB driver is pretty simple, maybe errors occur on cable and are not recoverable. I could send you another board with a different MCU to test.

walmisOP•12/8/22, 7:27 PM

Wwalmis One quick thing you could try is to isolate the PSU ground from the mains earth ...

HomeOfMomo•12/8/22, 8:18 PM

Is the power supply (+19 to 24V) ground tied to USB ground through a 0ohm resistor somewhere on the PCB that I can remove? If not, how do I separate USB ground from power supply ground? Thanks!

Wwalmis One quick thing you could try is to isolate the PSU ground from the mains earth ...

HomeOfMomo•12/9/22, 4:13 AM

Thank you for your offer! Let me play with the current board some more. I actually enjoy learning stuff about the USB interface that I knew nothing about before. If, say, I still struggle in a few days, I'll take up on your offer. I'm willing to pay for the shipping to offset some of your cost.

HHomeOfMomo Is the power supply (+19 to 24V) ground tied to USB ground through a 0ohm resist...

walmisOP•12/9/22, 7:39 AM

You can completely disconnect the 20V (both positive and negative) from the USB board (the fan will not work then though) - that will break the GND loop.
Or 2. remove the GND finger on the mains plug/or the earth wire from the mains lead that connects to the power supply input/or use a mains cable without grounding.

Wwalmis You can completely disconnect the 20V (both positive and negative) from the USB ...

HomeOfMomo•12/10/22, 1:39 AM

My +19 to 24V supply is a lab power supply, which has red(+), black(-), and green(chassis ground) terminals. My understanding is, since I'm connecting through red and black, I don't think the earth ground is part of the ground connection. Anyway, I did try tying +19 to 24V directly to the motors bypassing the FFB USB control board as you suggested and I still got the same USB issue. Looking closely at my build, I did notice the USB panel-mount connector that I got through Aliexpress does not have the shield tied to ground. I don't think it would matter but I would try to connect it to ground just to be sure.

HHomeOfMomo My +19 to 24V supply is a lab power supply, which has red(+), black(-), and gree...

walmisOP•12/10/22, 3:51 PM

Alright, it's not GND loop then, perhaps the USB wires go parallel and close with the power wires?
You could try to add a ferrite to the USB wires. Or maybe try another power source? Man, you have a strange case there

Wwalmis Alright, it's not GND loop then, perhaps the USB wires go parallel and close wit...

HomeOfMomo•12/12/22, 5:16 AM

Man, I agree with you that this is a real doozy. I tried AC outlets from different part of my house and from different circuit breakers. I also found a USB cable that had a built-in ferrite core and tried. All of the tried cases so far reproduce the same USB issue (occasional 1 sec ACK from endpoint). I haven't tried tying the shield of the panel-mount USB connector to ground (a somewhat difficult mod) but I'm skeptical that anything will be different. I'm close to the end of my wit unless you can come up with something else for me to try. I was in a process of building a home-made reflow oven but got distracted and didn't finish. I'm seriously considering completing this reflow oven project so that I can put the FFB control board in to reflow for a while just to see if my luck changes... Sigh...

HHomeOfMomo My +19 to 24V supply is a lab power supply, which has red(+), black(-), and gree...

SwiftVengeance•12/14/22, 1:04 PM

Maybe the issue is the lab power supply. I know Chinese rebranded ones are very noisy. Maybe you can try a different one like a laptop power brick or one that uses a transformer. Worth a try?

SSwiftVengeance Maybe the issue is the lab power supply. I know Chinese rebranded ones are very ...

HomeOfMomo•12/14/22, 4:48 PM

I actually started out with a laptop power brick and noticed the issue. I thought it would be better by switching to a lab power supply but the problem persisted regardless of form of supply.

SwiftVengeance•12/14/22, 5:14 PM

Have you tried a different computer?

SwiftVengeance•12/14/22, 5:16 PM

try it on a laptop if you have one, run the same tests. It could be the usb controller if your on amd motherboard.

SwiftVengeance•12/14/22, 5:17 PM

you can also try turning off all settings related to usb power savings/ standby/ sleep in windows and in bios.

SwiftVengeance•12/14/22, 5:18 PM

SSwiftVengeance Have you tried a different computer?

HomeOfMomo•12/15/22, 2:12 AM

Thank you for your response! My motherboard is AMD based Asus Tuf Gaming X570 Pro WiFi. I finally had a chance to do the same test on my Intel based laptop and could not reproduce the issue. I updated BIOS and AMD's chipset driver for Windows 10 to the latest and turned off all USB power/standby/sleep/selective suspend settings as you suggested. I still see the same issue. Unfortunately, my laptop is not powerful enough for gaming so I'm pretty much stuck. Where did you hear about this USB thing with AMD motherboards? Is it something that people complained a lot in the past?

SwiftVengeance•12/15/22, 2:13 AM

its a problem with other devices too

SwiftVengeance•12/15/22, 2:14 AM

hp had to send me a special cable for my hp reverb g2 so it doesn't crash all the time specifically for amd motherboard

SwiftVengeance•12/15/22, 2:16 AM

https://www.reddit.com/r/HPReverb/comments/oyk6xd/revision_2_of_the_reverb_g2_cable_and_all_the/

r/HPReverb - Revision 2 of the Reverb G2 Cable and all the Mysterie...

402 votes and 680 comments so far on Reddit

SwiftVengeance•12/15/22, 2:17 AM

this is what they did to it so it can work with my motherboard

SwiftVengeance•12/15/22, 2:17 AM

I have the asus strix x570i

SwiftVengeance•12/15/22, 2:18 AM

So you can try a usb hub or pci usb hub, apparently that fixes the issue if you find a good one

SwiftVengeance•12/15/22, 2:20 AM

apparently amd tried to fix it through bios updates multiple times and failed

SwiftVengeance•12/15/22, 2:21 AM

https://www.reddit.com/r/Amd/comments/kbr6zl/usb_issues_on_b550x570_motherboards

r/Amd - USB issues on B550/X570 Motherboards

261 votes and 568 comments so far on Reddit

SwiftVengeance•12/15/22, 2:21 AM

you can read more about it here

PiNKSH!T•12/15/22, 2:23 AM

will someone be able to help me out soon to run through the initial set up of my Rhino?

SSwiftVengeance you can read more about it here

HomeOfMomo•12/15/22, 2:34 AM

Wow, I had no idea!

I've tried my USB hub to no avail. Maybe I can go get a PCIe USB card next... Thanks again for the enlightenment!

HHomeOfMomo Wow, I had no idea!😫 I've tried my USB hub to no avail. Maybe I can go get a P...

SwiftVengeance•12/15/22, 3:35 AM

is the latest Ryzen chipset driver from AMD installed?

SwiftVengeance•12/15/22, 3:36 AM

is Disable Global C-State in the BIOS enabled? if it is then disable it

SwiftVengeance•12/15/22, 3:37 AM

can you run prime95 on you computer for a while?

SwiftVengeance•12/15/22, 3:38 AM

or convert a video in handbrake

SwiftVengeance•12/15/22, 3:40 AM

and see if your computer crashes

SwiftVengeance•12/15/22, 3:47 AM

try out all the ports on the back of the motherboard, there are cpu ports and chipset ports. the faster ones like usb3.0 and usb c are generally the cpu ports, also the newer the port like if ts usb 3 gen 2 or somethingits more likelyto have better signal integrity then just a usb 3 or a usb 2. for some people this happens only cpu ports or mother board ports only and for others it happens on both

SwiftVengeance•12/15/22, 3:54 AM

next step would be to buy a powered usb hub or powered pcie card

SwiftVengeance•12/15/22, 3:54 AM

https://www.amazon.com/gp/product/B00B6ZCNGM/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Inateck PCI-e to USB 3.0 (4 Ports) PCI Express Card and 15-Pin Powe...

Inateck PCI-e to USB 3.0 (4 Ports) PCI Express Card and 15-Pin Power Connector, Red (KT4001)

SwiftVengeance•12/15/22, 3:54 AM

lots of people say this one worked

SwiftVengeance•12/15/22, 3:56 AM

but if you find another cheaper where you live with sata power like this one then give it a try

SwiftVengeance•12/15/22, 3:59 AM

also try plug in all other usbs in the usb hub and plug in the rhino one alone in the best usb port on the back of your motherboard like usb c or the turquoise ports, those should be the best

SwiftVengeance•12/15/22, 4:00 AM

this might decrease the noise from the other usbs just enough for it to work

SwiftVengeance•12/15/22, 4:02 AM

try multiple different usb hubs, 3.0, powered , non powered, pcie, etc to try and get the cleanest signal possible

SwiftVengeance•12/15/22, 4:07 AM

oh one more is to try out pcie 3 in bios

SwiftVengeance•12/15/22, 4:09 AM

here is another idea

SwiftVengeance•12/15/22, 4:09 AM

use a really short usb cable from the rhino and plug it straight into a powered usb 3.0 hub with good quality thick shielded wire

SwiftVengeance•12/15/22, 4:09 AM

then the usb hub into the computer

SwiftVengeance•12/15/22, 4:12 AM

try adding a faraday cage or some kind shielding around the rhino logic board so it doesnt get affected by the magnetic currents from all the other components

SSwiftVengeance try adding a faraday cage or some kind shielding around the rhino logic board so...

HomeOfMomo•12/15/22, 4:35 AM

Wow, that's a lot to digest. I did update AMD's chipset driver to the latest and saw no improvement. I'll try one thing at a time as you suggested. I think it's pretty clear now that it has something to do with signal integrity.

SwiftVengeance•12/15/22, 4:38 AM

Yeah I think so too. Basically try to get the best signal possible and do the settings changes.

SwiftVengeance•12/15/22, 4:50 AM

https://www.usb.org/products

SwiftVengeance•12/15/22, 4:50 AM

Use this website for anything you get

SwiftVengeance•12/15/22, 4:51 AM

If the product your looking at is on here then its guaranteed to meet usb specifications

SSwiftVengeance If the product your looking at is on here then its guaranteed to meet usb specif...

HomeOfMomo•12/15/22, 5:10 AM

Roger, thanks!

PiNKSH!T•12/15/22, 9:11 AM

Hey sorry if I'm missing something obvious, but is there any documentation/tutorials of any kind to show me how to go about initial set up of the Rhino base?

One quick thing you could try is to isolate the PSU ground from the mains earth connection, other th

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