It's the start of the weekend. There are these two settings: retraction distance and retraction speed. And most of us have v6 and volcano nozzles to play with, and a range of different filaments. I keep thinking that they're really important settings that could change a lot. But have no idea how to optimise. Now with the arrival of the Titan, this should be a hot topic. What's the deal?
retraction - pulling back the filament retraction speed - how quick to pull it back when retraction is on - if S3D calculates it needs it, it will retract prior to move, then refeed that same amount on arrival if you have extra restart distance it will add or subtract to the amount refed on arrival if you have z-lift it will retract, then lift, move, drop, refeed
ram purge is a technique to purge the nozzle the idea is to extrude at a high enough speed to get coldish filament all the way to the bottom of the nozzle then retract it quickly enough to get it out of the melt zone before it does melt this is not managed by the inbuild S3D retraction system, but as part of a script (tool change script)
Thanks! So the default s3d PLA profile settings were, I think, 1.6mm and 75mm/s. I've heard people insisting on much lower - or hoping for much higher - numbers for the speed? I've heard people changing them according to the type of filament: and some people just leaving them the same? Some people think it's important to adjust... others see no difference?
By the way for the Taulman3D filaments they post settings for retraction given how exotic some of their materials are...
Interesting. On the other hand I've heard people say that for a v6 nozzle - kind of irrespective of filament - a certain retraction configuration is appropriate. It's a mystery!
Oh, I've found that different materials (due to elasticity, etc need more/less retraction) in my limited experience so far on the BB.
A while ago on G+ I asked RichRap what he considered to be "good retraction". He just posted the following reply: Richard Horne +R design I hate to say it all depends, but... If using an E3D V6 for example, I never - ever go over 5mm retraction, even in a Bowden system. 'Normal' would be 1-2mm. And speed really depends on what torque and gearing you have set - and how tightly clamped it is. Try to go as fast as you can without slipping or grinding. I'm not happy with an extruder retraction if it's not over 32mm/sec and I try to make them always go at least 40mm/sec. As little retraction as you can get away with and as fast retraction - and that to me is 'good retraction' Other people may have a different strategy, but that's what I do. Here's the post: https://plus.google.com/u/0/100264134938466402588/posts/YN8AdyWNGni?cfem=1
