Hello, I’m new to the 3d printing realm, i have encounter a problem I’m trying to print a model that has a 0.3 mm slit in the middle, but in my prints the slit is almost not existing, i have tried different layer heights. I now that the model isn’t the problem it has a lot of prints so its my fault
If anyone has an idea, it would help a lot. THX
I would print a curved slot in 0.05mm width increments in a small test block to find out how wide your designed slot needs to be for your printed slot width is correct. 0.35mm, 0.40mm, 0.45mm…
It’s not obvious to me from the image. It looks like the slit isn’t touching the bed surface, correct?
Do you have the slicer set to print external perimeters first?
The reasoning is that there’s pressure and overlap of every perimeter and infill so if you don’t have Print External Perimeters First then it often will print internal perimeters and work its way outward with each overlap pushing any excess outward.
You will also want to calibrate your machine so that you know darn well when your slicer is set to a .42mm wide line that you are outputting a .42mm line. You calibrate this by printing a single wall shape maybe 5-10mm high while turning off things like detect thin walls or anything else which will have the slicer change wall thickness. Then measure the wall thickness with calipers and adjust your Extruder Flow Ratio so that the extruder puts out a little more or a little less plastic to get your .42mm wide wall. Be sure to let the part cool for 15 minutes or so because there will be shrinkage.
Thanks for the replies, i will try some tests prints to calibrate my printer, clearly it has some calibration problem, I have just printed 2 cylinders that had to fit one inside the other, but they don’t fit.
mcdanlj - the slit doesn’t touch the bed , the height of the piece is 4cm and the depth of the slit is 1,5mm
Printer tuning is tedious, but as far a I know this is the gold standard for 3d printer tuning:
Hi, I can’t tell from the picture how this is orientated on the print bed, but that may be a factor i.e. you might need to tilt it a bit and use supports. Is that a top down or side view? Posting a 3D view might help.
Otherwise, it’s absolutely worth doing the calibration.
