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27-12-2011 #1
Hi All,
Firstly many thanks to Jonathan and John S for their kind help and advice, for HiltonSteve for his inspired build log and drawings and all you others who have contributed build logs, posts and to routercnc for the fantastic spreadsheets!!. I have now bought my ballscrews, linear rails and bearings from Chai on Ebay. They turned up on time, and everything is straight and not bent. A really nice guy and fantastic value. Thanks John S for that one and the source for the stepper drivers.
Attached are various CAD diagrams for which I would appreciate your comments. You know the old adage, measure twice cut once! The ballscrew sizes are X - 1100mm, Y - 750mm and Z 300mm with 20mm supported round rails on the X and 16mm everywhere else. I plan on using Nema 23 steppers at 3.1Nm with 36V ps at 11A. The main purpose is to (mill or rout John S -:) )wood for guitar bodies , but also have the capability to do light 6060 aluminum milling. The extrusions are 40x80 (heavy 4kg/m) sections with 15mm toolplate for the gantry sizes and bed ends. The Y axis is 120x40 (heavy 8kg/m) extrusion. Z axis is 10mm toolplate. Router will be Kress 1050FME-1 with a planned upgrade to one of the 2.2Kw VFD Chineese spindles once I've got more funds. The drawings don't show the ballscrews, steppers, router mounting plate or the plate to join the gantry sides as yet - after all it is Christmas! but they will be in the ususal positions.
Comments please?
Kind Regards
Mike
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