1)
3D printer has printed a part like this. What is the reason? 1st screenshot shows model is in the file & Model wall thick is 1 mm and printer nozzle diameter is 0.5 mm.
2)
Inscription on the part was not appeared.
But other part is okay.
1)
3D printer has printed a part like this. What is the reason? 1st screenshot shows model is in the file & Model wall thick is 1 mm and printer nozzle diameter is 0.5 mm.
2)
Inscription on the part was not appeared.
But other part is okay.
In general a putty knife (or some sharp tool) is used for these types of support material (though be careful in using the tools). But it might be not easy to remove it completely since it is on the inner side. Also it seems that they might have used the same material for support material which would make it little more hard.
Check with them about the properties of both materials and if support material is different then you might be able to find some other methods like other chemical (some support materials are water soluble) to remove the support material.
It seems those are the support material (as visible in picture 1). Did you printed them in-house Or got them printed from an outside company? If someone else did the 3d printing them he/she might have forgot to remove the support material. Also the engraving didn't appeared on the part due to model thickness or too coarse finish. Discuss both issues with the person who produced these parts.