I need some help. I just built a MK2 clone with Ramps/Mega 2560/ and tmc2130. Last Friday, I was installing the silentstep stick protectors and had a https://youtu.be/A2eAT2sgISA moment. I was conected to the mega via usb and monitoring it through Prontaface. I got an error reading that said E0 coil 1 and coil 2 fault to ground ( I had only the protector installed on E0). I turn back towards the ramps to look and see if I had some sort of loose wire, just in time to watch each tmc2130 spark in rapid succession, then a big pop, and lots of magic smoke. I actually laughed, as the scene for Star wars played in my head. This caused my laptop to shut itself off, some sort of usb protection, I guess.
So my question is, where did I go wrong.
The TMCs have damage to the ic. The mega has a burned out mosfet, I believe it is a mosfet.( see pic). Ramps seams to be fine with no visible damage, not even the fuses are damaged.
Is it the way I have the protector pins turned up?
Is it a faulty tmc that back fed?
Was it something to do with that mega? Side note the reset on the ramps quit working, with a new mega it does work.
Was it simple user error? Most likely culprit atm.
Was it something I’m missing?
And finally if the protectors will work in this manner can I also run the DN pin down through the protectors and out the bottom? Would make wiring management very clean. I just got replacement tmcs and 2 new megas, so I’d like to solder them up to use the protectors.
Thanks to any help in advance.
So it looks like you soldered the pins in some of the protectors wrong. The 4 pins for the motor have 2 pins either side. Quite clearly visible in your first photo is the fact that on two of these protectors, you’ve got 1 pin on one side, and either 3 pins or 2 pins and a hole on the other.
My guess is that by getting that wrong, you’ve connected the 5V supply via the motor coil to the motor output, which will be at whatever voltage your motors run at (eg: 12V, 24V, etc). Basically this will have fried anything active on the 5V rail. So the 5V reg on the Mega, probably the Mega itself, all your drivers, and possibly your LCD.
Also, if you’re installing/removing anything, (ie: unplugging/inserting to add in the protector, disconnecting/reconnecting motors, heater outputs, etc) you should have absolutely no power connected to the board. That includes USB (which can provide 5V power to certain parts). Before you turn it all back on, triple check everything looks right (eg: why does that cable look off-center… oh the pins are soldered wrong).
Protectors aside, there is also a startup sequence which is required from the tmc drivers NOT to blow.
It’s documented on the Watterott FAQ on github.
When powering up the printer you need to make sure the main power supply is on before the USB cable is connected.
When powering down the printer you need to be sure to unplug the USB before the main power supply is shut off.
What I did was strip part of the jacket of my USB cable and cut a chunk of the red (5V) out so it couldn’t connect anymore. I then taped it up. This ensures your board is never powered from the USB cable.
I believe that I found the culprit(me). I checked the protectors for shorts and surprise, surprise it was the first one I used.
If you can see in the pic there is some copper exposed and it is shorted. All of the other ones are fine, what luck.
I will continue to check all the new devices , before installation.
Lesson learned.
Any suggestions on if it is fixable, or how to?https://lh3.googleusercontent.com/q6CSo9TeanBOzJuVE5doLx03RMetvsqp4nq2ozDJ2iAM3PxNicr-7TWTC5a9Agvj_aiQ_zQkuA
Backup and running. I did have the drivers and protectors wired up right. Just a bad protector.
I’m running the tmc2130 on only the x and y axis atm. More are on there way, then I’ll rewire them.missing/deleted image from Google+
