[BUG] TFT_LVGL_UI (MKS_UI): Y axis motion loss / offset, does not occur with TFT_COLOR_UI

[phcay]

Did you test the latest bugfix-2.0.x code?

No, but I will test it now!

Bug Description

MKS_UI: Y axis movement loss / offset, does not occur with Marlin color UI

Bug Timeline

First use of official Marlin on this printer. Use of the TwoTrees (custom MKS) and MKS variants beforehand.

Expected behavior

No response

Actual behavior

When using MKS_UI there are Y axis movement losses / offsets at random Z heights, does not occur with Marlin color UI. The offsets generated can reach the entire width of the printed layer.
Note that my motherboard is an MKS Robin nano 1.2 and does not have uart / spi communication with the drivers, which are therefore in standalone mode, and Marlin cannot affect their current setting.
By significantly increasing acceleration and printing speeds, the problem seems to occur less, or even disappear, but it would take a lot more testing to confirm this.
On this printer, a TwoTrees Bluers, I used MKS_UI with the fork of Marlin 2.0 from MKS beforehand with a fairly similar setting without this anomaly appearing.

Steps to Reproduce

No response

Version of Marlin Firmware

2.0.9.2 (+commits 04/10/2021)

Printer model

TwoTrees Bluer V1+ (V2 in Marlin)

Electronics

Stock MKS Robin nano 1.2 x+y=tmc2208, z+e=tmc2209

Add-ons

BLTOUCH, MKS WiFi

Bed Leveling

ABL Bilinear mesh

Your Slicer

Prusa Slicer

Host Software

No response

Additional information & file uploads

Slicer is SuperSlicer.

I am using "#define MKS_UI" to switch between Marlin_color_ui and MKS_UI, with conditions on SERIAL_PORT_2, Marlin LCD menus, FILAMENT_RUNOUT_SENSOR, ADVANCED_PAUSE_FEATURE, TFT_LVGL_UI and TFT_COLOR_UI.

Configuration.h.txt
Configuration_adv.h.txt

[phcay]

I tested yesterday with the bugfix-2.0.x of 10/19/2021 and the result is the same.
I don't know if it is strictly related to MKS_UI or to other related things like MKS_WiFi. I saw that MKS released Robin nano firmware based on Marlin 2.0.9.2. When I have a moment, I'll test him to see if he reacts the same.

[phcay]

For information, I also tested on another printer, an ender3 with an MKS Robin Nano 2.0 card, and it's the same. With TFT_COLOR_UI, no problem. With TFT_LVGL_UI, random shift on the Y axis.

[Rockman18]

I experience the exact same bug since a while on my Two Trees Bluer modified with :

• MKS Robin nano v2
• TMC2209
• BLTouch
• MKS_WiFi
• MKS PWC

I'm on the latest bugfix-2.0.x with TFT_LVGL_UI.
On every print, I have Y axis shifts, more or less important 1-2mm or sometime very huge. Tonight, during a calibration cube one Y move was fully inverted and the extrusion find itself in the void.

I'll try TFT_COLOR_UI

Edit : TFT_COLOR_UI solves this issue.... Thanks for the hint. Hope MKS_UI will be fixed soon !

[phcay]

Yes, in addition to my Two Trees bluer with the MKS Robin Nano v1.2, I also have a Nano 2.0 on an Ender3, without WiFi module, with TMC2209 (in uart, unlike v1.2). Both printers present the same bug when using TFT_LVGL_UI, including on the MKS fork of Marlin 2.0.9.2 for Robin Nano.

Rockman18, can you provide your configuration.h and configuration_adv.h so that I can compare with mine.

I tried to analyze the code, but so far I haven't found any convincing leads. What is strange is that it only affects the Y axis.

[WesleyvH]

Confirmed, had the same problem. Layer shifts on Y axis after flashing this version of Marlin. Switched to TFT_COLOR_UI from TFT_LVGL_UI and it fixed the layer shifts.

Using custom built printer with MKS Robin Nano v1.2.
XYZ TMC2208
E0 A4988
No WiFi Module

[Rockman18]

Yes, in addition to my Two Trees bluer with the MKS Robin Nano v1.2, I also have a Nano 2.0 on an Ender3, without WiFi module, with TMC2209 (in uart, unlike v1.2). Both printers present the same bug when using TFT_LVGL_UI, including on the MKS fork of Marlin 2.0.9.2 for Robin Nano.

Rockman18, can you provide your configuration.h and configuration_adv.h so that I can compare with mine.

I tried to analyze the code, but so far I haven't found any convincing leads. What is strange is that it only affects the Y axis.

@phcay : Here are my configuration files Rockman18@36615bd

[mmaaddzz]

I have the same issue with 2.0.9.2. Objects are shifted in Y direction starting from random height. Board is Robin Nano v1.2 with TMC2209 drivers with serial connected to unused E1 pins. Without MKS_WIFI_MODULE.
Config.zip
.

[phcay]

I also opened a ticket on the MKS fork, which is also affected by the same issue since they reconciled with version 2.0.9.2, and other users reported the same issue.
This seems to only affect the Nano V1.2 and V2, but not the V3 (I have one in stock, when I have a little more time I would do a swap with the V2 to confirm or not that).
I suspect that there is a conflict of use of the PINs used for the Y axes, with an alternative function of these PINs (TIMER4, JTAG, FSMC, I2C, SDIO ...), which would also explain that this does not not happen on V3.

#define Y_ENABLE_PIN PE1
#define Y_STEP_PIN PE0
#define Y_DIR_PIN PB9

PinName Type I / O-Level Main-function- (after reset) Alt-funct-Default Alt-funct-Remap
PB9 I / O FT PB9 TIM4_CH4 (9) / SDIO_D5 I2C1_SDA CAN_TX
PE0 I / O FT PE0 TIM4_ETR / FSMC_NBL0 -
PE1 I / O FT PE1 FSMC_NBL1 -

But I don't have enough knowledge to find or fix this yet.

[gsalvati]

Se problem here MKS Robin nano 1.2 TFT_LVGL_UI. Custom built based on BLUER configuration source.

[daniDevKr]

I have a similar problem with my MKS Robin Nano V 1.2 board.
My marlin version: Marlin 2.0.9.2
The printed object have some shifted layers.
configurations.zip
model.zip