i am just downloading your codes. thank you sooo much by now. i will try to figure it out and let you know how i am doing. thank you for your offer to ask you questions.
regarding to my construction: i will build it next week. basically its a similar design to the makebot-router which you can find on www.makebot.com. the difference will be that i will use linear ball bearings. if you like i will keep you informed about how i am doing.
thank you so much again and have a nice day!