When cutting feed speed too fast what consequences

When cutting feed speed too fast what consequences. Of selecting the suitable laser cutting machine in cutting feed speed is very important, if choose undeserved can cause bad cutting results. Such as the choice when cutting feed speed is too fast will cause: ( 1) In can be cutting materials, cutting sparks. （ 2) Can cause some area can be cut off, but some area cannot be cut off. （ 3) Can cause the cut surface present article diagonal lines, and lower investment. （ 4) Can cause the whole cross section of thicker, but without melting stains.