Quote Originally Posted by Mjolinor View Post
Wow, that is one hell of a difference.

Are you changing the acceleration in replicatorG > machine > onboard preferences?

Care to post your numbers please.

Is this the same problem?
http://3dprintboard.com/showthread.p...rring-features
Yep, same problem!
I'll post some numbers that I've used below;

Quote Originally Posted by Geoff View Post
Awesome stuff!! Glad someone is working on it, that damn shadowing has always been an issue for me too - pretty much on any sort of hole that's printed or detail on the vertical. I would love to know what you did to get that final print, my FF is to the point now where it's done over 2000 hours, and although it's printed some awesome stuff I have never really gotten down to the nitty gritty.

I thought originally like Curious, that you were probably thinking these machines were capable of alot more than they really were, but as you have proven that's not the case and if you spend the time and effort you can get them printing just as good as a 3k ultimaker.
Just a 3k Ultimaker? We'll get it to print much better than that!

Quote Originally Posted by jimc View Post
you guys have already mentioned it and are all over the cause of it. its not your steppers. it all this boils down to resonance from sudden direction changes. almost every machine does it to some degree. some are better than other but this is what core xy movement gets rid of or atleast limits. unfortunately printers with core xy are extremely limited but you will be seeing it more and more on newer printers being released. this can also come right down to the material your printer is made of, how rigid the construction of the frame is and if the bed is cantilevered like on a mb/ff and tons of others and also the weight of the moving print head. you can lower the acceleration which can help a ton but this can also just be inherent in your printer's design and you will never get rid of it 100%.
Yes, I understand. Perhaps I'll make some parts out of aluminum as soon as I've got a CNC router to improve it a tiny bit more.
And even though my photo doesn't show it, in the last picture there is also some of this shadowing going on, but it's almost not visible (and you can't feel it with your nail) - so with some finish (paint) it'll look very clean.

Ok. Some numbers I tested yesterday - as a disclaimer; I just lowered it by a large amount and didn't test anything time-effeciency-wise yet. NOR have I tested any preferred settings. This will all be done over the following weeks.

Not at home, so have not got exact screenshot, but the acceleration settings can be changed by going to: RepG->Machine->Onboard Preferences->Acceleration

There you will see:

I am using Sailfish 7.7 and I pressed 'Reset motherboard to factory settings' to get standard values.
Then I took the 'X acceleration rate (mm/s²)' and 'Y acceleration rate (mm/s²)' and set them to 100 (because standard is "1000" and not "1" ... man I would've figured this out sooner if us Dutch people would use international standard regarding commas and dots...)
Also changed the 'X/Y max junction jerk (mm/s)' to 8
Press 'Commit Changes'.
..
and that's it that's were the fine-tuning will start. (because this specific setting made it so that prints take about twice as long! - but you'll really see and feel what the machine is doing, which is very interesting and useful! I think that with a lowered acceleration setting you can easily up the maximum speed.)
If you want to test stuff, good luck and please post pictures and/or settings!