BIQU BX printer config #4950

adelyser · 2021-11-21T16:27:42Z

BIQU BX STM32H743

Add the BIQU BX printer config.

Signed-off-by: Aaron DeLyser bluwolf@gmail.com

Sineos · 2021-12-06T16:20:16Z

config/printer-biqu-bx-2021.cfg

+step_pin: PG13
+dir_pin: !PG12
+enable_pin: !PG14
+microsteps: 16


You do not use interpolate, which is good acc. to #4977
Why this low microsteps?

This actually does use interpolate, the default is True.

Acc to #4977 it seems preferable to use higher microsteps and set interpolate: false
The BIQU BX SKR SE-BX should not even break a sweat with this

While the BIQU BX definitely doesn't have a problem with this config, testing shows that the printer is crazy loud using the spreadcycle mode. For default, I decided to leave it as stealthchop because most users will find it annoying and want to quiet it down anyways.

Sineos · 2021-12-06T16:20:32Z

config/printer-biqu-bx-2021.cfg

+uart_pin: PG10
+diag_pin: ^PB11
+run_current: 0.800
+hold_current: 0.525


You might want to refer to #4977
Same for the rest of the hold_current references

I removed the hold_current

Sineos · 2021-12-06T16:21:45Z

config/printer-biqu-bx-2021.cfg

+
+[tmc2209 extruder]
+uart_pin: PI8
+interpolate: false


Any reason to explicitly mention interpolate here?

This disabled interpolate, as the default is true

Sineos · 2021-12-06T16:26:27Z

config/printer-biqu-bx-2021.cfg

+    G4 P90000
+    G28 Z
+
+    M190 S{params.BED}
+    M105
+    M82
+    G90
+    G21
+    M83
+    G92 E0
+
+    # Set LED to Red for nozzle heating
+    SET_LED LED=led BLUE=0.0 RED=1.0 GREEN=0.0
+    M117 Heating Nozzle
+    G0 X2 Y0 F6000
+    G0 Z0.4
+    M109 S{params.NOZZLE}
+    M105
+    # Set LED to white for printing
+    SET_LED LED=led BLUE=1.0 RED=1.0 GREEN=1.0
+    M117 Printing
+
+    # Purge Line
+    G1 X120 E30 F1200
+    G1 Y1
+    G1 X2 E30 F1200
+    G92 E0
+
+    G1 Z1.0 F600
+    G92 E0
+    G0 F9000
+
+[gcode_macro PRINT_END]
+gcode:
+    M400                             ; wait for buffer to clear
+    M104 S0                          ; turn off hotend
+    M140 S0                          ; turn off bed
+    G92 E0                           ; zero the extruder
+    G1 E-4.0 F3600                   ; retract
+    #   Get Boundaries
+    {% set max_x = printer.configfile.config["stepper_x"]["position_max"]|float %}
+    {% set max_y = printer.configfile.config["stepper_y"]["position_max"]|float %}
+    {% set max_z = printer.configfile.config["stepper_z"]["position_max"]|float %}
+
+    #   Check end position to determine safe directions to move
+    {% if printer.toolhead.position.x < (max_x - 20) %}
+        {% set x_safe = 20.0 %}
+    {% else %}
+        {% set x_safe = -20.0 %}
+    {% endif %}
+
+    {% if printer.toolhead.position.y < (max_y - 20) %}
+        {% set y_safe = 20.0 %}
+    {% else %}
+        {% set y_safe = -20.0 %}
+    {% endif %}
+
+    {% if printer.toolhead.position.z < (max_z - 2) %}
+        {% set z_safe = 2.0 %}
+    {% else %}
+        {% set z_safe = max_z - printer.toolhead.position.z %}
+    {% endif %}
+
+    #  Commence PRINT_END
+    G91                              ; relative positioning
+    G0 Z{z_safe} F3600               ; move nozzle up
+    G0 X{x_safe} Y{y_safe} F20000    ; move nozzle to remove stringing
+
+    M106 S0                          ; turn off fan
+    G90                              ; absolute positioning
+    G0 X{max_x / 2} Y{max_y} F3600   ; park nozzle at rear
+
+
+[gcode_macro CANCEL_PRINT]
+description: Cancel the actual running print
+rename_existing: CANCEL_PRINT_BASE
+gcode:
+  TURN_OFF_HEATERS
+  PRINT_END
+  CANCEL_PRINT_BASE
+
+[gcode_macro M600]
+gcode:
+    {% set X = params.X|default(50)|float %}
+    {% set Y = params.Y|default(0)|float %}
+    {% set Z = params.Z|default(10)|float %}
+    SAVE_GCODE_STATE NAME=PAUSE_state
+    PAUSE
+    G91
+    G1 E-0.8 F2700
+    G0 Z{Z}
+    G90
+    M83
+    G0 X{X} Y{Y} F3000
+
+[gcode_macro RESUME]
+rename_existing: RESUME_BASE
+gcode:
+    RESTORE_GCODE_STATE NAME=PAUSE_state
+    RESUME_BASE


Macros should only be defined if they are needed to support specific printer functions (https://github.com/Klipper3d/klipper/blob/master/docs/Example_Configs.md 5.iv)

The PRINT_START macro is definitely needed to support this printer. This is due to how the ABL is setup and the macro implemented "mimmics" the printers current Marlin behaviour for consistent probing of the bed.

I also setup all the other macros based on user feedback on the stock printer. Should I remove those anyway?

Thanks for the feedback!

I don't know this printer, so I guess this is fine. Final call is on Kevin anyway

I'm fine with removing all the macros except PRINT_START. That one is important for printer usability.

KevinOConnor · 2022-01-26T23:21:01Z

Some feedback:

The example config should not specify a pressure_advance setting.
Specifying "interpolate=false" doesn't seem to make sense.
I don't understand the comment at the top of the file regarding the display requiring the mcu to set the initial pins. We typically only use the mcu initial pins setting to set pins that must be set in order to communicate with the host. If there is some other necessary setting, it really should be in the printer.cfg file and not in "make menuconfig".
The example macros look complex to me. It's generally preferable to keep the example configs similar to ease long term maintenance. I think the goal of the example configs should be to get an initial starting point for users - not to customize the printer for them.

-Kevin

KevinOConnor · 2022-01-26T23:21:54Z

Also, the extruder rotation_distance looks very unusual. It's generally preferable to specify a gear_ratio for extruders using a gearing mechanism.

-Kevin

adelyser · 2022-01-26T23:35:59Z

@KevinOConnor Thanks for the feedback.

I will remove the pressure advance setting, you are correct that shouldn't be in there.
I will remove the interpolate setting
So the GPIO pins need to be set so they are active when the printer boots, not when Klipper connects. The TFT Screen, specific to the BIQU BX printer, has an HDMI switcher and the backlight controlled from the mainboard LTDC driver in Marlin. These GPIOS are required to be set, or you will not see anything on the screen during bootup, or until Klipper connects.
The only macro really needed is the PRINT_START macro. This printer comes with an ABL probe and there's a specific sequence needed to get it to work properly, which PRINT_START handles. I can remove all the other macros, or trim them out to be the basic macros needed.
-The weird thing about the rotational distance, I tried using the gear ratio method and my extrusion values were noticeably off. This was what I came up with to get a valid extrusion value that worked. I don't know what was going on with the gear ratio, but it was off.

KevinOConnor · 2022-01-27T16:21:48Z

Thanks.

These GPIOS are required to be set, or you will not see anything on the screen during bootup, or until Klipper connects.

I understand the gpios need to be set. I don't understand why they need to be set in "make menuconfig" instead of in "output_pin" settings in printer.cfg?

The weird thing about the rotational distance, I tried using the gear ratio method and my extrusion values were noticeably off.

You should be able to count the number of teeth on the extruder gearing mechanism and then apply that to your existing rotation_distance. So, for example, if it is 50:17 gear ratio, then you would replace rotation_distance: 3.433 with gear_ration: 50:17 and rotation_distance: 10.097 (3.433 * 50 / 17 == 10.097).

-Kevin

adelyser · 2022-01-27T17:36:54Z

@KevinOConnor Thanks for the response.

I understand the gpios need to be set. I don't understand why they need to be set in "make menuconfig" instead of in "output_pin" settings in printer.cfg?

So these need to be set in the firmware because you want the display, while the RPI is booting, when the printer is turned on. The RPI is attached to the backside of the TFT and powered with the printer power. If these are put into the printer.cfg file, you get no display until klipper connects. If there is an error with klipper connecting, still no display, which is is a bad experience. It acts as if the printer isn't doing anything but running the fans.

You should be able to count the number of teeth on the extruder gearing mechanism and then apply that to your existing rotation_distance. So, for example, if it is 50:17 gear ratio, then you would replace rotation_distance: 3.433 with gear_ration: 50:17 and rotation_distance: 10.097 (3.433 * 50 / 17 == 10.097).

I totally understand what you're saying and I fully understand the calculations. At first, I did use a gear ratio of 7:1, with a rotation_distance of 24.03 (correct values for the H extruder, 932 esteps provided by BIQU). The extruder was over-extruding while printing. Changing that to 3.433, fixed the extrusion issue. I toggled it back and forth a couple times to confirm, and I don't know why it wasn't working correctly.

KevinOConnor · 2022-01-27T18:19:35Z

So these need to be set in the firmware because you want the display, while the RPI is booting, when the printer is turned on.

This isn't what the comment in the example config file says. If this is a "nice to have" then the comment should say that - for example, "Note: In order to update the TFT70-BX display when the micro-controller first starts, add PB5 and PE5 ...".

Changing that to 3.433, fixed the extrusion issue.

That indicates something is very wrong and should be investigated. The only thing Klipper does with the rotation_distance is multiply it with full_steps_per_rotation and gear_ratio to get an internal step_distance. Updating the config with gear_ratio: 7:1 and rotation_distance: 24.031 results in an identical internal state.

-Kevin

adelyser · 2022-01-27T19:00:42Z

@KevinOConnor Ok, updated everything.

I changed the verbage for the note at the top. I also added the gear ratio back in. I agree that it "should" be identical to what I had, but it wasn't I didn't spend any time trying to figure out why. A lot of example show to just set the rotation_distance based on esteps, so that's what I ended up doing.

I also had to add a G90 at the end of print_start, as slicers such as Cura and S3D expect that and it was causing move errors.

KevinOConnor · 2022-01-29T18:31:49Z

Thanks.

-Kevin

nicedevil007 · 2022-02-05T22:50:57Z

@adelyser I have a problem with your default config and hope you can help ? #5236

small side question: did you figure out how to get the whole display to show the klipperscreen or are you using anything else?

adelyser changed the title ~~STM32H7 - BIQU BX config~~ BIQU BX printer config Dec 6, 2021

Sineos reviewed Dec 6, 2021

View reviewed changes

adelyser added 12 commits January 26, 2022 16:52

Add config for BIQU-BX printer

0b6027d

Move comments for print_start

49af185

Add note about setting PB5 and PE5

5ac9c11

Update print_start variables

dcf4a6e

Update macros

7f4333e

Fix tab

a09c975

Remove motor hold currents, reset serial device, remove virtual_sdcard

14e19dc

Add BIQU BX to the tests

b6f63c9

Add config for stm32h743

aa8a66d

Fix a typo

169c89d

Add beeper pin definition

315fdc9

Remove macros, pressure advance and interpolate

d2bbc64

adelyser force-pushed the biqu_bx_config branch from c7e73bf to d2bbc64 Compare January 26, 2022 23:55

Update verbage, set gear_ratio

dda0ee1

mental405 assigned mental405 and unassigned mental405 Jan 28, 2022

KevinOConnor merged commit c15d38b into Klipper3d:master Jan 29, 2022

diggit mentioned this pull request Feb 7, 2022

test fails #5242

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BIQU BX printer config #4950

BIQU BX printer config #4950

adelyser commented Nov 21, 2021

Sineos Dec 6, 2021

adelyser Dec 6, 2021

Sineos Dec 6, 2021

adelyser Dec 6, 2021

Sineos Dec 6, 2021

adelyser Dec 6, 2021

Sineos Dec 6, 2021

adelyser Dec 6, 2021

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KevinOConnor commented Jan 26, 2022

KevinOConnor commented Jan 26, 2022

adelyser commented Jan 26, 2022

KevinOConnor commented Jan 27, 2022

adelyser commented Jan 27, 2022

KevinOConnor commented Jan 27, 2022

adelyser commented Jan 27, 2022

KevinOConnor commented Jan 29, 2022

nicedevil007 commented Feb 5, 2022

BIQU BX printer config #4950

BIQU BX printer config #4950

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adelyser commented Nov 21, 2021

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KevinOConnor commented Jan 26, 2022

KevinOConnor commented Jan 26, 2022

adelyser commented Jan 26, 2022

KevinOConnor commented Jan 27, 2022

adelyser commented Jan 27, 2022

KevinOConnor commented Jan 27, 2022

adelyser commented Jan 27, 2022

KevinOConnor commented Jan 29, 2022

nicedevil007 commented Feb 5, 2022