I been playing with wipe and coasting since today I got a lot of free time for the first time in 3 weeks. And.. well.
Coasting distance, works much better with very very very short distances like 0,04-0,20. Using like I used before distances of 0.40-0.60 creates an error on the print, when doing a TON of retracts and extruding very small amounts of material, like my little texts that are on a process that uses 0.32-0.36. There's a point that makes it under extrude the text after the 3-4layer because there are errors on the restart after a retract since some material has been lost on the wipe/retract. Specially when printing more than 1 at the same time. With just 1 it happens but ... well... depends on the material mostly.
If you activate Wipe nozzle and you have 'Perform retraction during wipe movement' then the distance you set for 'Wipe nozzle' it doesn't matter. It will wipe as much time as the retracts takes place. So if you retract faster the wipe distance will change. Also it will only wipe if the minimum travel for retraction kicks in, so it won't wipe always, but only when he can.
To be able to control wipe nozzle, you must deactivate the perform retraction during wipe, but that also removes the retraction. So... It's quite like juggling balls.
Ofc the amount of filament lost could be controlled with extra restart distance. But that would need a very fine tune with a big amount of print tests.
a) Save coasting for very drippy filaments
b) Wipe nozzle + advanced 'perform retract during wipe' cancels the distance of the wipe with as much as he needs to retract (so retraction speed + distance defines this)
c) Wipe alone without retraction can be controlled.
This it's how the retraction speed affects how much distance will the wipe do when te option 'perform retract during wipe' it's enabled.