I think ...
Many problems with the machine are very much dependent on the quality of the filament current used. Color additives and the overall composition have a very large influence on the resulting for property quality and even on the adhesion behavior. There are colors such as magenta, or yellow, which did not even want to adhere properly to a special print plate. Because, unfortunately, small tweaks are almost invariably required. I print mostly with inexpensive PLA, which regularly is cheaper by almost half compared to Ultimaker filament. New materials I test with identical settings, characterized itself quality differences of the various filaments can be identified very quickly.
A major problem also exists in the material feeding in a Bowden extruder system with only one drive wheel. Even apparently well-modified material feeder, fundamentally based on the ordinary principle with a single drive wheel, can often not keep the material flow over a longer period consistent enough, since the most accurate calculations can unfortunately do anything about.
Observe once the material transport to the naked eye, at any open material feeder, such as that of iRobert. Then it looks at the current machine maybe normal, but on closer inspection of various filament pieces that have been run by the same machine, a problem can be clearly seen. Unfortunately, my not yet published BEMF-Universal has this unicycle problem:
The distances of the bite-marks of the knurled wheel in the filaments are often differing from one another, and sometimes even sanding marks to heavy abrasion can be seen. A very small grip-loss can at the final object already left clearly visible traces. It helps a bit, if the material feeder allows a wide adjustment range for the force of the counter pressure roller, but then high print speeds are almost unthinkable.
Here two materials from a single supplier, printed with identical machine Settings:
I would skip zsteps, esteps, and temperature. I would leave X and Y alone. I don't think there is anything to gain in those areas.
However for UMO you can make the Z axis much faster by increasing acceleration. I doubled mine (long forgot from what to what) and this greatlyl reduces any Z scaring because switching layers is more of a click than a move - very fast.
On the UM2 I think the Extruder can probably go much faster. Someone should play with extruder acceleration and max velocity. I have a feeling it can go maybe 10X faster. If retractions were more of a click than a zip, that would not just speed up prints but it should improve quality also.
Link to post
Share on other sites