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bigtreetech / BIGTREETECH-SKR-mini-E3

BIGTREETECH SKR-mini-E3 motherboard is a ultra-quiet, low-power, high-quality 3D printing machine control board. It is launched by the 3D printing team of Shenzhen BIGTREE technology co., LTD. This board is specially tailored for Ender 3 printer, perfectly replacing the original Ender3 printer motherboard.
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Screen in Marlin mode gets scrambled when starting a print #335

Open Whiskaya opened 4 years ago

Whiskaya commented 4 years ago

Description

Screen scrambles text and shows unintelligible symbols that change fast when starting a print. Sometimes this happens when starting in TFT mode and then switching to Marlin mode, without starting a print. Sometimes text scrambles lightly in Marlin mode. Moving the knob may sometimes fix it. (VIDEOS AT THE END)

Steps to reproduce

  1. Start printer normally (in Marlin mode).
  2. Start preheat.
  3. Start print.

Expected behavior Normal printing.

Actual behavior Printer keeps working as normal. Entering menus (if you remember the moves on the knob) is still possible. Screen is unreadable.

Actions taken

  1. Flashed stock (stable) firmware on main board and TFT board.
  2. Changed ribbon cable.
  3. Tried different SD cards, in all formats (FAT16 and FAT32) and sizes (micro w/ adapter and regular), from board and TFT mount.
  4. Connected stock display.

Hardware

Ender 5 Stock PSU SKR Mini E3 V2.0 TFT35 E3 V3.0

First 2 pictures show "light scrambling" (recoverable when moving the knob). Last 2 show "severe scrambling" (can't see the Marlin screen until reset). image00001 image00002 image00003 image00004 Videos.zip

jphansendk commented 4 years ago

Have same issue.. Haven’t found solution yet.. But For some reason I have a suspicion to low memory on EEPROM is causing it.. just don’t know what to pick to shrink my Marlin firmware.. CE8FC4D1-455C-4C64-B57A-C7B157801E64

Whiskaya commented 4 years ago

I've read some comments blaming the generic PSU, as soon as they changed it for a MeanWell, the problem was gone. Maybe it's an interference problem, as it starts when heating... mostly. Still, very few times it starts without any high current active (i.e. idling). Tried many firmware changes so far, just to try and confirm if it's a hardware thing.

jphansendk commented 4 years ago

Do you have a long cable like me connecting the screen and the board? Don’t know if that can be a part of the issue.. my “glitch” starts as an example if I run a PID calibration and go in to the menu afterwards to store the new PID.. that is impossible for me.. the glitch happines as soon I enter the menu.

Whiskaya commented 4 years ago

I’m just using the cable that comes with the TFT35 V3.0. For now you might want to try doing the PID from a computer and save it with M500. I've noticed even though the screen goes crazy, the printer itself doesn't stop working.

jphansendk commented 4 years ago

Yeah guess so but it doesn't solve the issue 😄

jphansendk commented 4 years ago

Just found this: https://marlinfw.org/docs/basics/troubleshooting.html

Whiskaya commented 4 years ago

Nope... Still the same :/ Tried to fiddle around with the numbers. No luck. At this point I'm 90% sure it's something to do with some kind of interference.

IMG_9588.mov.zip IMG_9587.mov.zip

Whiskaya commented 4 years ago

Just to make it more interesting... here's both displays at the same time(TFT35 using TFT cable and stock LCD using the serial one). No problems in the stock display with and without the firmware edit. Seems as it could be a thing within the TFT35 board maybe?

Both Displays Stock LCD
jphansendk commented 4 years ago

Or maybe the simulation causes the problem. As I understand it tft35 emulate the marlin mode? So maybe it's some settings in the tft35 firmware where the solution can be found?

jphansendk commented 4 years ago

From a thread on facebook I made got this reply: Hi

I had exactly the same issue when I retrofitted one od my printers. I nearly lost my mind trying to figure it out. In my case, I clipped a ferrite bead around the TFT and EXP1 and 2 cables and the isue went away. In my case the symptom only showed up when I turned on the bed heater.

jphansendk commented 4 years ago

I'm not a code guy and don't have the guts to jump in right now but the new release of Marlin 2.0.6 could be a solution?

https://github.com/MarlinFirmware/Marlin/releases

jphansendk commented 4 years ago

Just compared my configuration.ini with a guy who had it working without the glitch.. the only difference is his baudrate is set to 250000 mine is set to 115200. Will test later

jphansendk commented 4 years ago

Just tested the baudrate. Changed from 115200 to 250000 and I think that fixed the problem.. SOOO f** simple.. will report back if I'm wrong.

Whiskaya commented 4 years ago

Already tried Marlin 2.0.6 and baudrate to 250000... no luck. Now I dare to say: It's most definitely a TFT board thing!

vicewize commented 4 years ago

I’ve been fighting this since day one. Tons of different Marlin flashes, TFT flashes, etc. I 100% believe it has to do with the TFTs hardware when trying to emulate. It happens to me if I try to edit like z-steps or anything and I’m turning encoder a lot it’ll happen, but then I’ve had it happen just within a menu. Can’t figure it out. So I use the stock display and the TFT for now.

jphansendk commented 4 years ago

Do you have the baudrate set to 250000?

vicewize commented 4 years ago

Do you have the baudrate set to 250000?

I’ve tried mine with both Baud rates and same result. 115200 & 250000. It still occurs. I’m stumped.

Andyman14159 commented 3 years ago

Hi I'm commenting to keep this issue alive. December 2020 and I have tried all of these fixes with no good sustainable result. Has anyone came across anything new?

Beekeeper007 commented 3 years ago

same Problem with Ender 5+ and SKR Mini and tft35 v3 and everything is brand new ....

but only when bed is heating and if the display is near the psu or skr mini?????

if i put the display infront of the printer (as long es the cables get) on the floor it worked?? but a couple of inches nearer to the psu the screen gets scrambled when heating...what it could be? i checked everything...would ferrite help??

Pipstapee commented 3 years ago

I have the same issue after swapping over the hotend to a Volcano and extending the display serial cable to have the PSU at the back of my Ender 5. I've changed the hotend back to the standard one and it's still an issue so I'm going to assume it's the serial cable. I've a huge reconfig going on but will have a swap around to see what makes the difference and or solves the issue.

Pipstapee commented 3 years ago

I swapped back to the original Ender screen and it worked fine with no issues, indicating it was the an issue with the TFT35. I remember having an issue with the BMPs when I flashed the firmware initially so revisited that. Although I didn't use the touchscreen icons I thought there may have been a connection some how. I flashed the TFT35 firmware again and followed this guide to the letter: https://github.com/bigtreetech/BIGTREETECH-TouchScreenFirmware No issues after a few days of printing.

kermus commented 3 years ago

I can say 90% certainty that the culprit is the motherboard (SKR Mini E3 v1.2) I have changed my own Ender3 power supply, display, all the display cable and firmware several times and each time the same problem comes on for about 30min-2 hours from start printing

Yathani commented 2 years ago

Make sure the ribbon cables for the TFT are not touching any stepper drivers on the motherboard. Keep them away as much as you can.

TGTools79 commented 1 year ago

Hi there! 1st, thank you all very much for your comments as it helped me eliminate a bunch of possibilities. I (finally) managed to stop my TFT24 from doing the same. Just by supplying 5v to the "5v Independent Power Supply" port. It could be in combination with other stuff i did but as soon as I did this, the problem has vanished completely. image Edit: After installing some longer cables to mount my screen top front of my printer, The problem showed-up again but this time it was way worse than ever. Immediate scrambling on the screen at power-on in marlin mode. Even with a good 5v supply to it. I figured that it might just be some noise from the long cables and after sheilding the EXP1 and EXP2 cables with copper tape and grounding the shield to the power supply's casing the problem was solved again. Removing the 5v independent supply; still no scrambling. When switching to BTT mode (thru the still un-shielded TFT cable) everything looked fine at first but when trying to send some commands to the printer, nothing was happening. I changed the TFT cable for a homemade shielded one with 4 connectors and using the shield as ground. Everything is working perfectly since then.

LouDnl commented 1 year ago

After reading what @TGTools79 described here, I was able to resolve my issue with the random characters and the display freezing.

What I did was:

Now it seems solved, will post here if not :)