[FR] Buffer SLOWDOWN allow custom/user threshold

[reloxx13]

Description

Currently the SLOWDOWN threshold is 50% of buffer. So it will slowdown if the buffer is half empty.

Now if i set a higher buffer, i have more commands which are still waiting in the buffer and i dont need to slowdown at 50%, rather at 25%.

Example1: Default
Buffer max 50 commands
Half 25 commands
=> Slowdown

Example2: Higher Buffer
Buffer max 100 commands
Half 50 commands, still enough
Now at quater 25 commands left
=> Slowdown

Conclusion

It would be nice if the user can define the slowdown threshold himself, but set default at 50%.
The boards are also getting better and will have a higher buffer.

Or the other way around, eg if octoprint is too slow transfering the commands, a higher threshold could gain some important time to avoid printhead stops which result in blobs.

Config example:

// If defined the movements slow down when the look ahead buffer is under given percentage
#define SLOWDOWN 25 //in percent (default 50)

[vadsh]

I believe that would be a great feature. 50% with large buffer is not good. Custom threshold seems to be easy to implement and useful.

[sjasonsmith]

This was added about 6 months ago:
#17171

[github-actions]

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