First, congratulation on your ordering and welcome to the forum!
The dimensional accuracy is a very interesting question. As I do not print ABS I cannot give you proper numbers for the accuracy to be expected with this material. With PLA, which has a substantially smaller shrink effect while cooling down, I got positioning accuracies down to 0.1mm on nearly any dimension, coming mainly from the play of the belts. However, bores will always be up to half a millimeter smaller in diameter than they should and outer contours 0.1-0.2mm larger.
It's nearly impossible to predict. Or it would require a software similar to the software used for tool design in injection moulding. The usual way to go is try and error. Print the part once, measure the important dimensions and adjust the model, print again etc.
But this is the nice thing about printing with a consumer 3D printer, the costs of a print are much smaller than with a professional machine while quality differences shrink every day.
If everything is well adjusted and all screws are tight, then prints should be quite repeatable. Everything else is a hint that something is not as it should be.
Shrinkage of ABS is 0.4-0.7%. So your 100mm in CAD should be between 99.3mm and 99.6mm in your printed object.
It has nothing to do with the printer, it is a characteristic of the material.
EDIT: I have never printed with ABS.
EDIT2: Variation between parts should be very small.
Link to post
Share on other sites