Hi Roman, ----- Original Message ----- From: Roman Black To: Sent: Saturday, December 29, 2001 8:30 AM Subject: [EE:] homemade CNC pick and place | Hi everyone, has anyone built a home made | CNC pick and place machine to do SMD work? | | I'm thinking of doing one with a couple of | old matrix printer chassis, they have sliders, | belts and stepper motors ready and will do good | speeds with 0.1mm repeatability easily. I've designed and built a small CNC router using three old matrix printers mechanisms, two wide carriage travel (y axis) an one normal carriage ravel( x axis). The reason of the two mechanisms for the y axis is for easy preventing of 'sticking' in the non-motory support, without the use of precision mechanics. This way, i've mounted the x axis mechanism over the carriages of the y axis, and one of the y axis motors is slave of the other. Anyway, and although this system is working (for now, plotting graphics using Bresenham's line algorithm), for best results i'll recommend You to take the hard way and do the mechanics from zero. By the way, my controller board is autonomous and decodes up to 64 KB of G-Codes (actually, only an adapted version of G00 and G01) previously downloaded from a PC to the system's memory. Best Regards and Happy New Year, S.- -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics