Marlin- change Y axis pins on skr1.4 board

Hi all,

Wondering if anyone could help me with Marlin configuration. I'm trying to upgrade the board on my MK3s bear to a BTT SKR 1.4. There is something wrong with the port for the Y axis. It just chatters and doesn't want to move. I switched to the X axis port on the board and it works fine. So what I'm trying to do is switch the Y axis pins to the E1 pins which aren't being used. I made the attempt to revise the configuration that Chris Warkocki has on GitHub- [github.com]
I keep getting errors and it won't compile. I'm also upgrading to a TFT v3 touch screen.

Any help would be super appreciated! I will pay someone for their time to assist.

You have to edit Marlin/src/pins/lpc1768/pins_BTT_SKR_V1_4.h

Fine all of these lines.

#define Y_STEP_PIN P0_19
#define Y_DIR_PIN P0_20
#define Y_ENABLE_PIN P2_08
#ifndef Y_CS_PIN
#define Y_CS_PIN P1_09
#endif

#define E1_STEP_PIN P1_15
#define E1_DIR_PIN P1_14
#define E1_ENABLE_PIN P1_16
#ifndef E1_CS_PIN
#define E1_CS_PIN P1_01
#endif

#define Y_SERIAL_TX_PIN P1_09
#define Y_SERIAL_RX_PIN Y_SERIAL_TX_PIN

#define E1_SERIAL_TX_PIN P1_01
#define E1_SERIAL_RX_PIN E1_SERIAL_TX_PIN


Swap all "Y_" and "E1_" over then Y will use E1 on the controller.

Thank you for the reply.

I did change those. The problem I was having was that it wouldn't build in VScode. I kept getting errors.

How about posting the error so we see what is going on?

Attached are the errors that are preventing the build.

Something is very broken with your platfomio install.

delete the directory C:\Users\12313\.platformio (note the . in front of platformio) and restart vscode, it will reinstall platformio.

Deleted the directory you specified. It did reinstall on startup. Attempted another build on had these errors.

Again, thank you for the help.

You have broken your configuration.h

You have removed or commented out a #if without removing or commenting out its corresponding #endif line

Please stop using docx, its a PITA (for non windows users like myself)

Edited 1 time(s). Last edit at 09/26/2021 04:14PM by Dust.

I apologize. Copy, paste doesn't seem to work.

#define MOTHERBOARD BOARD_BTT_SKR_V1_4
//#endif
This endif was not commented out. Could you tell me where else to look?

You have not attached your Config files, so no, I can't
Not without new error messages or the Configuration.h and maybe the Configuration_adv,h file

Sorry. dumb question.

This is not the correct place

#ifndef MOTHERBOARD
  #define MOTHERBOARD BOARD_BTT_SKR_V1_4
//#endif

This should be

#ifndef MOTHERBOARD
  #define MOTHERBOARD BOARD_BTT_SKR_V1_4
#endif

The real cause is the line

//#if ENABLED(Z_SAFE_HOMING)

Which must be

#if ENABLED(Z_SAFE_HOMING)

you also really want Z_SAFE_HOMING enabled
change

//#define Z_SAFE_HOMING

to

#define Z_SAFE_HOMING

Now it compiles.

It looked like it was compiling. Then I received these errors-


Compiling .pio\build\LPC1768\src\src\module\settings.cpp.o
Compiling .pio\build\LPC1768\src\src\module\stepper.cpp.o
Compiling .pio\build\LPC1768\src\src\module\stepper\indirection.cpp.o
Compiling .pio\build\LPC1768\src\src\module\stepper\trinamic.cpp.o
Compiling .pio\build\LPC1768\src\src\module\temperature.cpp.o
Compiling .pio\build\LPC1768\src\src\module\tool_change.cpp.o
Marlin\src\module\stepper\trinamic.cpp:1024:45: error: static assertion failed: Y_SLAVE_ADDRESS conflicts with another driver using the same Y_SERIAL_RX_PIN or Y_SERIAL_TX_PIN
1024 | #define SA_NO_TMC_SW_C(A) static_assert(1 >= count_tmc_sw_serial_matches(TMC_SW_DETAIL_ARGS(A), 0, COUNT(sanity_tmc_sw_details)), TMC_SWSERIAL_CONFLICT_MSG(A));
| ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Marlin\src\module\stepper\trinamic.cpp:1026:3: note: in expansion of macro 'SA_NO_TMC_SW_C'
1026 | SA_NO_TMC_SW_C(Y); SA_NO_TMC_SW_C(Y2);
| ^~~~~~~~~~~~~~
Marlin\src\module\stepper\trinamic.cpp:1024:45: error: static assertion failed: Z2_SLAVE_ADDRESS conflicts with another driver using the same Z2_SERIAL_RX_PIN or Z2_SERIAL_TX_PIN
1024 | #define SA_NO_TMC_SW_C(A) static_assert(1 >= count_tmc_sw_serial_matches(TMC_SW_DETAIL_ARGS(A), 0, COUNT(sanity_tmc_sw_details)), TMC_SWSERIAL_CONFLICT_MSG(A));
| ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Marlin\src\module\stepper\trinamic.cpp:1027:22: note: in expansion of macro 'SA_NO_TMC_SW_C'
1027 | SA_NO_TMC_SW_C(Z); SA_NO_TMC_SW_C(Z2); SA_NO_TMC_SW_C(Z3); SA_NO_TMC_SW_C(Z4);
| ^~~~~~~~~~~~~~
Compiling .pio\build\LPC1768\src\src\sd\Sd2Card.cpp.o
*** [.pio\build\LPC1768\src\src\module\stepper\trinamic.cpp.o] Error 1
=========================================================== [FAILED] Took 133.62 seconds ===========================================================
Environment Status Duration
------------- -------- ------------
LPC1768 FAILED 00:02:13.621
====================================================== 1 failed, 0 succeeded in 00:02:13.621 ======================================================
The terminal process "C:\Users\12313\.platformio\penv\Scripts\platformio.exe 'run'" terminated with exit code: 1.

Terminal will be reused by tasks, press any key to close it.

Your Marlin/src/pins/lpc1768/pins_BTT_SKR_V1_4.h isnt quite correct in some way





Make sure it has these 4 lines

#define E1_SERIAL_TX_PIN P1_09
#define E1_SERIAL_RX_PIN E1_SERIAL_TX_PIN

#define Y_SERIAL_TX_PIN P1_01
#define Y_SERIAL_RX_PIN Y_SERIAL_TX_PIN

If that doesn't solve it, attach the file pins_BTT_SKR_V1_4 for inspection.

That allowed it to compile. The axis are not moving correctly though.

When I move the axis listed the result is as shown-

Z- left Z and Y. And the Bed is chattering terrible like it did when hooked up to the original driver
Y- Only moves the right Z
X- Works perfectly

I'm ready to just order another board. I'm sure you are as frustrated as I. I apologize for the time you've invested.

Your first post says "So what I'm trying to do is switch the Y axis pins to the E1 pins which aren't being used"

But your have setup the Configuration_adv,h so that Z uses two stepper drivers ieThe Z and the E1

You cannot use E1 as a second Z and a Y

If this is in error you need to change #define NUM_Z_STEPPER_DRIVERS 2 in Configuration_adv.h to #define NUM_Z_STEPPER_DRIVERS 1

I'm confused as to why the 2nd Z stepper is set up as E1. I didn't change this.
There is a designated driver for that stepper. I have attached the board schematic.
The E1 should be unused unless you have duel extruders. Unless I am not understanding it correctly.

Z can use 1,2,3 or 4 stepper drivers
You have set NUM_Z_STEPPER_DRIVERS 2.
This uses the unused E stepper as Z2 stepper

change NUM_Z_STEPPER_DRIVERS to 1

ZMA znd ZMB are both connected to the 1 z stepper driver

This worked. I thought there were 6 steppers. I didn't realize the 2nd Z went to the E1.

Thank you for all of the help!!!!