Printing with Bambu Silk+ on my A1 and I am seeing variation in the sheen of the color. The first layers are glossy, then it changes to more of a satin sheen, then back to glossy and now satin again.
I dried the filament for 8 hours @ 50C.
I set the Outer wall speed to 40 mm/s.
It seems like this happens when speed varies, but shouldn’t all outer walls follow the same speed setting (40 mm/s)?
I am printing multi-color with PLA Matte, this has a nozzle temp that is 10C lower than the Silk, but the nozzle appears to heat up before printing the Silk. Could this be the cause?
In the slicer result select ‘speed’ view and you will see how the speed varies by layer. You can slow down the outer wall to get a more consistent look but it will increase print time.
When investigating “sheen” etc, check 3 things in preview tab to see if any of them line up. All these are characteristics of the filament, so this is extremely generalized:
Check the Speed tab, ensure you’re not bumping into your maximum flow rate / layer cool time, etc and that there is a uniform speed on your outer layers. You are ok here
Check the Flow tab. Ensure similar, that it isn’t constrained on the outer wall.
Check the Layer Time tab. If your visual aberrations line up with the layer time map, then it’s likely related to the polymers cooling/contracting/warping. You can do things with the minimum layer time to potentially slow down to become more uniform. I notices your print is multicolor. The layer time between layers that switch and layers that stay a single color is DRAMATIC and sometimes needs to be handled if the polymer cant handle it nicely.
If the aberrations only occur on layers with color changing, not directly to layer time (this can be hard to tease out, but youll know), then you may want to increase your flushing volume to the max.
Flow is consistent between colors along the outer wall.
Layer time is also consistent between all but the very top layer (which I haven’t gotten to yet). I will try playing with the layer time.
The sheen changes do appear to correlate with filament changes, also I reduced flushing volumes by half (which has worked well with non-silk filaments). I will increase flush volume back to 100%.
Increasing the flushing volume back to 100% has helped, but there is still a change in sheen (from glossy to matte) that occurs after a certain height. It does correlate with a color change, but there are many other layers with color changes where the sheen remains constant (glossy).
