Pendant XHC-WHB04B-4 - Constant USB disconnects

When you do the repairing what does the pendant say? It seems to reconnect without holding the RESET button as the instructions say. Maybe it really isn't re-pairing properly?

I will verify the udev rules.

Worth noting that on my daily use laptop (Ubuntu 22.04) it doesn't seem to be detected at all. The LinuxCNC machine sees it but then kicks it off after ~5s (USB disconnect) beginning a cycle of disconnecting/reconnecting.

Appreciate your help!

I remember I had issues with that also, so try to hold RESET longer as it does not say anything (as I remember)

I'm sure you need to do it multiple times as indeed it is done in complicated way without any visible interaction

I'm on holidays till next year so after that will be back with CNC if you don't fix it will try something

But let me know if you succeed in meantime

I used the WHB04B-4 for a year without problems on Linuxcnc 2.9.
After a fresh install of Linux and Linuxcnc (2.9) the problem started:

I noticed that lsusb shows correctly when the usb dongle is inserted but the pendant is off.
bus 002 device 002 10ce:eb93 Silicon Labs
I can repeat lsusb over and over and the device will be number 002
If I now switch on the pendant, the device will disappear in seconds. If I keep checking lsusb the device connects again for a short time, now with a new (higher) device number. And this goes on as long as the pendant is ON.
lsusb
bus 002 device 015 10ce:eb93 Silicon Labs
lsusb
the whole Silicon Labs line is missing
lsusb
bus 002 device 016 10ce:eb93 Silicon Labs
lsusb
the whole Silicon Labs line is missing
lsusb
bus 002 device 019 10ce:eb93 Silicon Labs

etc etc

Now I am on Linuxcnc 2.10 same problem.

anyone??

Maybe it is a problem with the device itself, I tried the same with my pendant (wireless) on version 2.9 (updated today) without any issues. 

After more trials I seem to be able to use the pendant again.
My work-around:

1. Keep the pendant switched off
2. power on CNC and computer
3. Start Linuxcnc
4. Home the machine
5. Power on the pendant

So far this has worked every day the last week.
Problem contained!


The disconnects still happen when I only have linux running and check with the terminal, so I just stopped doing that. This was possible before however...