I have a A1 printer with the AMS option.
Since day one, supports are a bit of a problem, but until a few weeks it is a mess.
The subjects self mostly print good enough (the occasional lost strand or blob is irritable), but when i print supports it is getting realy ugly.
The print head scrapes over the already printed supports and there are gaps, strands an blobs everywhere!
I’ve calibrated all there is to calibrate, but the print itself is fine. It is only the supports that are a problem.
With a properly calibrated filament the supports should be unless your speeds are way too high and/or you print them in very fine layers.
The mess of blobs could be due to bad retraction settings.
There is simple test models to play with the parameters in order to reduce or get rid of the artefacts.
The nozzle bumping into things again should not happen with a well calibrated filament but it can happen anyway with certain materials.
You can adjust the Z-hop distance to get more clearance for travel moves, even force the hop (take more print time) but that should only be required for tricky filaments.
Print the Bambu cube with your standard settings and check for quality.
If it comes out perfect it means your settings are as good as it gets, if it has flaws then there is room to improve.
The nozzle temp should be just high enough to provide a good layer bond but not too high as this make the filament too soft and aggravates curling and other issues.
As a rule of thumb I got 5º above the temp that provides single wall objects where I can’t rip the layers apart.
In the quality settings you can adjust the line width for the supports, the default is 0.42mm.
Increasing this to 0.5mm might help during the testing phase.
I print at default speed and at default layer thickness. The bumping of the nozzle is only with supports; not with the subject nor the infill. I’ll try the z-hop!
The quality of the cube is pretty decent just as the rest of my prints. While printing the cube I saw a black blob, while I was printing white PETG, so that was odd. I had a new print nozzle so I changed them and recalibrated everything again.
After fiddling all morning and afternoon with minimal result I was changing some filament settings again and my eye was drawn to the “User presets” menu just below the filament settings.
It read: “0.08 extra fine”… I dismissed it first, but a few seconds later I thought: That should be way higher!
And yes… I should read 0.20 Standard!
So changing it back to 0.20 solved al problems. Although fiddling with the settings made the print even a bit better, so happy camper here!
It has either be changed during an update or by myself without me knowing it.
So the lesson to be learend for me is: check to see if everything is default!
