Error on 'SET_VELOCITY_LIMIT ACCEL_TO_DECEL=': unable to parse

General Discussion
1

Printer Model: Voron Trident
MCU / Printerboard: M8P

klicky-macros.cfg (43.8 KB)

printer.cfg (21.7 KB)

klippy.log (1.8 MB)

Error on ‘SET_VELOCITY_LIMIT ACCEL_TO_DECEL=’: unable to parse

So took a break from printing for a while, on returning, did some updates.
Now, I get the following error message:

Error on ‘SET_VELOCITY_LIMIT ACCEL_TO_DECEL=’: unable to parse

I see that Klipper-macros has the lines:

M400
SET_VELOCITY_LIMIT ACCEL={printer.configfile.settings.printer.max_accel}
SET_VELOCITY_LIMIT ACCEL_TO_DECEL={printer.configfile.settings.printer.max_accel_to_decel}
RESTORE_GCODE_STATE NAME={function} MOVE={move} MOVE_SPEED={speed}

Is it trying to find
SET_VELOCITY_LIMIT ACCEL_TO_DECEL=
in printer.cfg ?

I could revert the cfg files to a previous backup but would like to resolve this is anyone can help.

Thanks, Dan.,

2

See the latest changes from 20240313:
https://www.klipper3d.org/Config_Changes.html#changes

As the parameter ACCEL_TO_DECEL has been deprecated along with max_accel_to_decel the respective commands for setting those are obsolete now.

You should now use: minimum_cruise_ratio
And look here for reference on the new set functions:
https://www.klipper3d.org/G-Codes.html?h=minimum_cruise_ratio#set_velocity_limit

2 Likes
3

You are running a non genuine Klipper version:

Git version: 'v0.12.0-125-gbfb71bc2-dirty'

For we don’t know what is changed, it’s recommended to try again with a clean Klipper version.

4

Thank you,

Seems I need to wait for Klipper to catch up the updates.
Set manual limits in the meantime which works.

Regards

Dan

5

Hi

Thanks. Seems Klicky hasn’t caught up with the changes. Manual speed solved problem in meantime.

Regards

Dan

6

Klipper is quite up to date!
You have to adapt your macros where those commands are involved.

7

Klicky I mean

8

Anyone have the correct entry I need to update Klicky Probe cfg?

The problem was…
M400
SET_VELOCITY_LIMIT ACCEL_TO_DECEL={printer.configfile.settings.printer.max_accel_to_decel}

I’ve changed it to manually set the speed, which solved the problem:.
SET_VELOCITY_LIMIT ACCEL_TO_DECEL=2000

Thankls

9

Be careful as you cannot simply replace max_accel_to_decel by min_cruise_ratio.

To convert from one to the other:

min\_cruise\_ratio = 1 - \frac{max\_accel\_to\_decel}{max\_accel}
1 Like
10

Thanks, will give it a go.

11

So it was:
SET_VELOCITY_LIMIT ACCEL_TO_DECEL={printer.configfile.settings.printer.max_accel_to_decel}

Now it should be?:
SET_VELOCITY_LIMIT ACCEL_TO_DECEL={printer.configfile.settings.printer.min_cruise_ratio = 1 - \frac{max_accel_to_decel}{max_accel}}

Or?:
SET_VELOCITY_LIMIT ACCEL_TO_DECEL= 1 - \frac{max_accel_to_decel}{max_accel}

12

The new variable is
printer.toolhead.minimum_cruise_ratio

I would suggest not to mess with this macro and wait until the original author updates it.
Personally, I will not invest my time to sift through this macro and find the places where an adaption is needed.

13

Hi Folks, hi @Hypoxic01
Have had the same Problem today, here is the solution:

You’ve only to copy the “klicky-macros.cfg” and all works as usual.

Regards

3 Likes
14

Thank you. Klippy-macro.cfg updated and working great!

1 Like
15

Thank you! This saved me a lot of debug time! worked great.

16

New here, but I edited the TEST_SPEED macro and it’s working.

# NOTE Find how to use instructions here: https://ellis3dp.com/Print-Tuning-Guide/articles/determining_max_speeds_accels.html
# Home, get position, throw around toolhead, home again.
# If MCU stepper positions (first line in GET_POSITION) are greater than a full step different (your number of microsteps), then skipping occured.
# We only measure to a full step to accomodate for endstop variance.
# Example: TEST_SPEED SPEED=300 ACCEL=5000 ITERATIONS=10

[gcode_macro TEST_SPEED]
gcode:
    # Speed
    {% set speed  = params.SPEED|default(printer.configfile.settings.printer.max_velocity)|int %}
    # Iterations
    {% set iterations = params.ITERATIONS|default(5)|int %}
    # Acceleration
    {% set accel  = params.ACCEL|default(printer.configfile.settings.printer.max_accel)|int %}
    # Bounding inset for large pattern (helps prevent slamming the toolhead into the sides after small skips, and helps to account for machines with imperfectly set dimensions)
    {% set bound = params.BOUND|default(20)|int %}
    # Size for small pattern box
    {% set smallpatternsize = SMALLPATTERNSIZE|default(20)|int %}
    
    # Large pattern
        # Max positions, inset by BOUND
        {% set x_min = printer.toolhead.axis_minimum.x + bound %}
        {% set x_max = printer.toolhead.axis_maximum.x - bound %}
        {% set y_min = printer.toolhead.axis_minimum.y + bound %}
        {% set y_max = printer.toolhead.axis_maximum.y - bound %}
    
    # Small pattern at center
        # Find X/Y center point
        {% set x_center = (printer.toolhead.axis_minimum.x|float + printer.toolhead.axis_maximum.x|float ) / 2 %}
        {% set y_center = (printer.toolhead.axis_minimum.y|float + printer.toolhead.axis_maximum.y|float ) / 2 %}
        
        # Set small pattern box around center point
        {% set x_center_min = x_center - (smallpatternsize/2) %}
        {% set x_center_max = x_center + (smallpatternsize/2) %}
        {% set y_center_min = y_center - (smallpatternsize/2) %}
        {% set y_center_max = y_center + (smallpatternsize/2) %}

    # Save current gcode state (absolute/relative, etc)
    SAVE_GCODE_STATE NAME=TEST_SPEED
    
    # Output parameters to g-code terminal
    { action_respond_info("TEST_SPEED: starting %d iterations at speed %d, accel %d" % (iterations, speed, accel)) }
    
    # Home and get position for comparison later:
        M400 # Finish moves - https://github.com/AndrewEllis93/Print-Tuning-Guide/issues/66
        G28
        # QGL if not already QGLd (only if QGL section exists in config)
        {% if printer.configfile.settings.quad_gantry_level %}
            {% if printer.quad_gantry_level.applied == False %}
                QUAD_GANTRY_LEVEL
                G28 Z
            {% endif %}
        {% endif %} 
        # Move 50mm away from max position and home again (to help with hall effect endstop accuracy - https://github.com/AndrewEllis93/Print-Tuning-Guide/issues/24)
        G90
        G1 X{printer.toolhead.axis_maximum.x-50} Y{printer.toolhead.axis_maximum.y-50} F{30*60}
        M400 # Finish moves - https://github.com/AndrewEllis93/Print-Tuning-Guide/issues/66
        G28 X Y
        G0 X{printer.toolhead.axis_maximum.x-1} Y{printer.toolhead.axis_maximum.y-1} F{30*60}
        G4 P1000 
        GET_POSITION

    # Go to starting position
    G0 X{x_min} Y{y_min} Z{bound + 10} F{speed*60}

    # Set new limits
    #SET_VELOCITY_LIMIT VELOCITY={speed} ACCEL={accel} ACCEL_TO_DECEL={accel / 2}
    SET_VELOCITY_LIMIT VELOCITY={speed} ACCEL={accel} MINIMUM_CRUISE_RATIO={0.5}

    {% for i in range(iterations) %}
        # Large pattern diagonals
        G0 X{x_min} Y{y_min} F{speed*60}
        G0 X{x_max} Y{y_max} F{speed*60}
        G0 X{x_min} Y{y_min} F{speed*60}
        G0 X{x_max} Y{y_min} F{speed*60}
        G0 X{x_min} Y{y_max} F{speed*60}
        G0 X{x_max} Y{y_min} F{speed*60}
        
        # Large pattern box
        G0 X{x_min} Y{y_min} F{speed*60}
        G0 X{x_min} Y{y_max} F{speed*60}
        G0 X{x_max} Y{y_max} F{speed*60}
        G0 X{x_max} Y{y_min} F{speed*60}
        
        # Small pattern diagonals
        G0 X{x_center_min} Y{y_center_min} F{speed*60}
        G0 X{x_center_max} Y{y_center_max} F{speed*60}
        G0 X{x_center_min} Y{y_center_min} F{speed*60}
        G0 X{x_center_max} Y{y_center_min} F{speed*60}
        G0 X{x_center_min} Y{y_center_max} F{speed*60}
        G0 X{x_center_max} Y{y_center_min} F{speed*60}
        
        # Small patternbox
        G0 X{x_center_min} Y{y_center_min} F{speed*60}
        G0 X{x_center_min} Y{y_center_max} F{speed*60}
        G0 X{x_center_max} Y{y_center_max} F{speed*60}
        G0 X{x_center_max} Y{y_center_min} F{speed*60}
    {% endfor %}

    # Restore max speed/accel/accel_to_decel to their configured values
    #SET_VELOCITY_LIMIT VELOCITY={printer.configfile.settings.printer.max_velocity} ACCEL={printer.configfile.settings.printer.max_accel} ACCEL_TO_DECEL={printer.configfile.settings.printer.max_accel_to_decel}
    SET_VELOCITY_LIMIT VELOCITY={printer.configfile.settings.printer.max_velocity} ACCEL={printer.configfile.settings.printer.max_accel} MINIMUM_CRUISE_RATIO={printer.configfile.settings.printer.minimum_cruise_ratio}

    # Re-home and get position again for comparison:
        M400 # Finish moves - https://github.com/AndrewEllis93/Print-Tuning-Guide/issues/66
        G28 # This is a full G28 to fix an issue with CoreXZ - https://github.com/AndrewEllis93/Print-Tuning-Guide/issues/12
        # Go to XY home positions (in case your homing override leaves it elsewhere)
        G90
        G0 X{printer.toolhead.axis_maximum.x-1} Y{printer.toolhead.axis_maximum.y-1} F{30*60}
        G4 P1000 
        GET_POSITION

    # Restore previous gcode state (absolute/relative, etc)
    RESTORE_GCODE_STATE NAME=TEST_SPEED