Add retraction for duration of retraction

[PHYKER]

Could you add additional retraction according to the time it takes to move to the next location?
As in: if the move is going to be smaller than 0.25 seconds, the retraction will be the normal retraction.
If the move is larger than 0.25 seconds, the retraction is on a gradient curve of "Y" mm/s.
Or, have the retraction take place 1/2 at the beginning of the retraction and 1/2 along the move.

Moving farther requires additional suction on the nozzle to keep the filament material from oozing and the printer should be able to accommodate this with software.

Thanks in advance for the awesome software you guys provide!!

-Shane

[oliverbrossmann]

I think this would be a great feature and help print quality

-Oliver

[jfkansas]

There isn't true "suction" in a hot end, It isn't a hydraulically sealed system, like a syringe.

A lot forget to use the coast and - retract values. Remember for every retract there is an equal and opposite "prime" where the same amount of filament is pushed that was previously retracted. Using a small negative value in the Extra Restart will prevent some extra ooze. Of course coast can attempt to empty the nozzle a bit before retraction.

[oliverbrossmann]

The problem with using coast or - on restart is that if you have a lot of travel moves/ retracts in a small space you build up a deficiency in your filament flow and will have small missing layers until a section of uninterrupted printing occurs.

[jfkansas]

That is why you set a value so retracts don't happen unless moves are 5mm or so or more.