V1pi and SKR-PRO-V1.2 integration

LowRider CNC Advice
1

I recently got my LR2 working to the point where I was able to use the TFT35-E3 V3.0 to verify that the steppers are working as expected and they are. I am about ready to print out the crown and have the .nc file created and ready to load. I would really like the use one of my spare Raspberry Pi 3 B+ boards to drive the SKR-PRO-V1.2 so that I can access it through a browser and be able to load the .nc files across the LAN. The Pi has v1pi loaded and it boots up. I am able to connect to v1pi.local and bring up CNCjs 1.9.20. The problem I’m having is connecting to the SKR-PRO-V1.2. Currently I’m using the blue USB cable that came with the SKR-PRO to connect to the Pi. I am unable communicate between the Pi and the SKR-PRO. The red LED next the the USB type B connector on the SKR-PRO board is on and with the Pi is disconnected or powered down this LED is off.

I can’t remember if I read somewhere that the USB connection between the Pi and the SKR-PRO (driver board) has to be made with cable with a type A connector on both ends or not. If so, that could be the problem, but this isn’t all that common, so I’m guessing my memory may be at fault here. If my memory is at fault then, I’m missing something. From everything I’ve read, this should pretty much be a plug-n-play operation.

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Can’t use positioning / jog buttons to move the steppers which may not be possible with CNSjs and this is something I can live with if that’s the case. But, I am also unable to load a .nc file, something I can’t live without!

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I am absolutely sure this is something I’m doing wrong, I just can’t figure out what. I should also note that I’m attempting to debug not being able to load the .nc files is being done at my desk in the house, which means the that the driver board is not physically connected to any stepper motors at the moment.

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I’m not sure if that would prevent a .nc file from being loaded. Note: I live in South Florida and the temperature in the garage is in the upper 90 with a fan blowing. NOT COMFORTABLE!!! So the testing that can be done in air conditioned space, is.

Thanks in advance.
ken

2

Your usb cable looks fine - have you tried it with other devices to make sure it’s good? I’ve gotten some bad ones when they’re bundled with other purchases.

If the cable checks out, try different COM port and BAUD settings. My grbl shield connects to cncjs at 112500, but my RAMPS board connects to Repetier Host at 250000. Not sure what the SKR board expects, as I don’t have one to play with.

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You should see two ports on the upper left. One is the builtin (ama, I think) and the other is skr (acm, I think). And the baud rate should be 250k. Then hit open.

4

Thank you gentlemen, that seems to have fixed that problem. It did, however, highlight another problem and that is that the server stops after a few seconds (30).

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Then…

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Seems I remember reading something about this and crontab. Jeffab3, you seem to be the go to guy for things related to v1pi issues, any ideas?

Sorry for the delayed response. Wanted to make sure everything was done properly before reporting results.

Thanks again!

5

Found the problem. Seems I was clicking on the wrong serial port. After picking the other port mentioned, the problem with disconnecting from the server seems to have been corrected.

Now I can try printing the crown!!!

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