Making max_accel_to_decel proportional ?

I can't get max_accel_to_decel to adjust dynamically on Accel changes and couldn't find answers in previous posts. Printer.cfg is : [include RatOS/printers/v-core-3/speed-limits-performance.cfg] Superslicer travel_deceleration_use_target is ticked. Any help ?
5 Replies
3DBoomer
3DBoomer2y ago
Should I just overide to :max_accel_to_decel = (1 / 2) * max_accel ?
miklschmidt
miklschmidt2y ago
You would need your slicer to set it via SET_VELOCITY_LIMIT. Only slicer i know that has support for that is OrcaSlicer.
3DBoomer
3DBoomer2y ago
Klipper
Proportional acceleration control
This is a set modifications to the kinematics parameters that I developed on my printer. The end goal is to allow the printing time to be dynamically changed while preserving the distances over which the toolhead accelerates, cruises, and decelerates. I make this topic for judging interest and to discuss the naming, compatibility and user exper...
miklschmidt
miklschmidt2y ago
this is a thread discussing potential changes to the internals of klipper this is not valid in a config What most people do, if they don't have a slicer supporting klipper (like OrcaSlicer) is override M204 so that it sets both accel and max_accel_to_decel at some predetermined ratio. In my case, i simply just leave it maxed out I don't see a big value in a lower max_accel_to_decel on my printers.
3DBoomer
3DBoomer2y ago
Well.... you certainly have an Top Notch Ultra Super Light printhead. On a 500 with an LGX and 7530.... I had this working on my old handmade klipper on Bears, it works great now on the Ratrigs : [gcode_macro M204] rename_existing: M204.1 gcode: {% set f = params.F|default(0.5)|float %} {% if 'S' in params %} {% set s = params.S|float %} SET_VELOCITY_LIMIT ACCEL={s} ACCEL_TO_DECEL={ s * f } {% else %} {% if 'P' in params %} {% set p = params.P|float %} {% if 'T' in params %} {% set t = params.T|float %} {% if p < t %} SET_VELOCITY_LIMIT ACCEL={p} ACCEL_TO_DECEL={ p * f } {% else %} SET_VELOCITY_LIMIT ACCEL={t} ACCEL_TO_DECEL={ t * f } {% endif %} {% else %} SET_VELOCITY_LIMIT ACCEL={p} ACCEL_TO_DECEL={ p * f } {% endif %} {% elif 'T' in params %} {% set t = params.T|float %} SET_VELOCITY_LIMIT ACCEL={t} ACCEL_TO_DECEL={ t * f } {% endif %} {% endif %}
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