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TinyG USB goes on and off if I move an axis by hand
Posted: Tue Nov 21, 2017 7:37 pm
by Pixopax
I placed a few boards today and hat several connection errors, in the middle of the placement it hanged.
Now I foundout that as as soon as I move an axis by hand the USB connection sound of Windows goes off. There seems to get current from the mototrs to the USB connector. I am not sure, but that seems to be the case.
I did not have that before.
Does anyone know how I can prevent that?
Re: TinyG USB goes on and off if I move an axis by hand
Posted: Tue Nov 21, 2017 10:58 pm
by mawa
Stepper motors are very good generators and if you turn them too fast you can produce high voltages that can eventually destroy your TinyG.
Some drivers have protection circuit.
I don't know if the ones used in tinyG have such a protection. If you look at the board while you move the stepper you can notice the leds lighting up. So the electricity gets to the board.
So, don't turn the stepper by hand. If you can't avoid it, then do it very... very... slow.
Re: TinyG USB goes on and off if I move an axis by hand
Posted: Wed Nov 22, 2017 7:52 am
by JuKu
Although not certain (I’ve read the data sheet but didn’t get a good answer), it seems that TinyG tolerates this. Still, if started to get hiccups, something went wrong. Grounding, perhaps?
Re: TinyG USB goes on and off if I move an axis by hand
Posted: Wed Nov 22, 2017 8:31 am
by Pixopax
I now grounded all metal parts of the machine itself, and will see if it gets better today, I have to place the other side of the boards.
Re: TinyG USB goes on and off if I move an axis by hand
Posted: Wed Nov 22, 2017 8:11 pm
by Pixopax
I just checked your post about the USB camera problems, and downloaded the tool showing all usb connections. I found out that I have 2 hubs on my system, both cams and the TinyG were all on one hub.
Now I can connect the cameras on each hub, that would make my connection problems better I guess.
Tomorrow is placement day again, we will see
Louis
PS: I placed some 300 boards with your liteplacer now, it still works good. It needs some afterwork sometimes, but that is ok.
The tousands of Cs and Rs which I do not have to place by hand now pay for that
But to be fair, I have other cameras, use a complete other layout, board in the middle, tapes left and right from it, and use an other software (the rmod-fork) which is vastly reprogrammed to suit my needs.
It can manage panels, and has also QFN-detection, but does not use the up cam.