... . MODELCEDSHKANGLEC13MM6MM20 Warm promptly:When you engraving different hard stone , please change your machine parameters as follows:1,NormalJoyFeedrate:1800-50002,RapidJoyFeedrate ... . If you have any questions with CNC Router Machine , How to use our tools , How to use engraving softwares , please contact us . Yueqing Diamond ...