Hi everyone ! ( i’m sorry if my english is not better…i’m from France )
I build my MPCNC and I use Titan aero for extrude. I had a big problem from the quality to my print…
I use a good black PLA and when I finish to print, He look like brigh and he is brittle… I’m begginner and I need help !
Thank you !
How fast is it running?
First off that isn’t as bad as it looks, for that to finish printing you are pretty close to the right settings. We need to know what settings you used to be able to help. That is kind of a tough print to start with, something more cubic is a better starter.
Could be print speed, print temp, retraction, print fan.
Thank you for yout help,I send you some screenshot to repetier, I have to modify in repetier or in arduino config.h ?
change
retract speed to 30mm/s
retract distance to 1mm
Your print speeds are way too high for an mpcnc, I use 30mm/s max, if you have a really small rigid build maybe 35. You have 100! Look at my settings in the extruder page and match them. A regular printer basically only moves around an extruder, the MPCNC moves 5 steppers an extruder and the whole center gantry, much stringer but also much more massive. Slow and steady is the name of this game.
Even your travel is pretty insane and faster than the firmware permits, if that print were larger it would have failed. Rapids I would say no faster than 60mm/s or so.
Conservative settings on this page, https://www.v1engineering.com/import-extruder/
My first thought would be to check that your extrusion steps are calibrated correctly. Speed could explain that but it looks to me like it may be under extruding. Here’s a writeup on how to check extrusion calibration:
I can’t even print that fast on my delta.
For printing that fast the print came out pretty good in my opinion. I didn’t think it could move that fast without breaking something, now we know. Slow it down and I think it will be fine.
