Troubleshooting multiple issues is hard. This is a good step, it shows there was something not right with the TFT screen.
The steppers moving opposite is a different problem.
One note, never plug or unplug a stepper while the board is on. We’ll address the motion issues as a separate troubleshooting step.
This can be a problem, but we haven’t seen it in a while- and we have to be careful because…
The TFT is what smoked? It’s dead. Flipping the connector in this case wasn’t what needed to be done. The results with the RAMPS screen made that obvious, but the latency in replying meant we couldn’t warn you off.
Can you confirm the SKR is OK, and the RAMPS screen still works for you?
the board is shot i think, after switching the grey cable, it rings a high pitch sound from the skr board and ramps and tft. Before it smoked I uploaded the V1CNC_SkrPro_Dual_2209-2.0.7.2-src version and both motors were moving together but the marlin screen on the ramps was very distorted and ‘glitched’, I noticed in the firmware for V1CNC_SkrPro_2209-2.1.1 only has x, y and z uncommented but not x2, y2?
Reversing those cables should not have smoked anything. People reverse them all the time. I’m sorry something shorted, but reversing them shouldn’t have caused the issue. I would have advised trying that if Marlin mode didn’t work.
Where did the smoke come from? The Skr Pro? Can you post a picture of the burnt part?
Also, Something is weird in your setup. Until we have a good explaination, I would be wary of any of those parts. Maybe something in the screen shorted the skr pro. Maybe it was a cable. Whatever it is, you don’t want to toast new electronics.
There isn’t a burnt part, I just saw smoke around the area that the power cable is plugged in so I turned it off quick. Now as soon as I plug in any screen it beeps very loud, high pitch continually.
Look carefully at the connector pins on the SKR. It sounds like there may be a short on the grey cable connectors. Something that is small that might have dropped in there from some wire stripping. Also check underneath for solder bridges. (and make sure there is NOTHING metal under the board on the desk/table: I lost a board due to just a small wire under the board when I powered it up.)
Hmmm. Things go sour in milliseconds. I’m pretty sure if you saw smoke then something burnt up. I am surprised it is working this well but something is toast.
Agreed. I see that the display renders the V1 logo (corrupted), so the MCU on the SKR is running, but its not a healthy system.
I suggest going back to just SKR and PS. Does that power up and have the beeper on? From there we start checking out the PS and SKR by themselves and follow that wherever it takes us.
The beeper is controlled by a separate I/O pin to the screen. An output bank of I/O on the st microcontroller could be broken. That might explain why the screen logic still works but it is garbled. I have had that happen with a ln arduino mega. One set of outputs will be bonkers but the rest works ok.
In this case, I wish we knew why it fried. But the skr pro needs to be replace, unfortunately.
thank you Jeff and MakerJim for all your help, I really appreciate it. I was making this to teach my high school students to give them a hands on engineering experience, it’ll have to wait.
Hi, I was able to buy a new big tree skr pro 1.2, it’s doing the same thing, where only one stepper is moving and the other one follows along, like they aren’t in sync or just one motor is moving? Here is a video showing what it’s doing
It looks like one of the steppers is not powered. Did you set the jumpers right?
Did you connect the power correctly?
Also: why 6 drivers on the board?
