It seems that Sefer toras can't be used for torah readings/alias(since nobody uses them for it and the amazing facts and feats book mentions a machine made Sefer can't be used. But Why cant a Sefer torah be written by a machine? If it's about lishma my pressing the start button should be good enough no?
Rambam list some things which would not give a Torah Scroll not a drop of sanctity and would be like a printed book:
If someone who wrote it is an Apikores or any other type of prohibited person. If someone wrote it without concentrating on Divine names.
שכתבו אפיקורוס או כיוצא בו משאר פסולין
שכתב האזכרות בלא כוונה
Computers seem to fall under that category.
In Kerisos 19b it is explained: Machshava is when someone thinks to do something, kavana is when someone is doing something for X.
You may have kavana with the button, but the computer doesn't.