> Please keep us updated about your progress with XYUV. > > (As far as I know, your foam machine is another milestone for EMC2.) > > Chris
Well, I got everything up and running last night, and after playing with my g-code for a bit, and trying to figure out the right combination of feed rate and wire temperature I managed to cut a reasonably respectable airfoil core. Some pictures of it are here. http://i14alberta.ca/gallery2/main.php?g2_itemId=1014 The only real issue I had was that I was generating x,y positions for the foil shape in relation to the chord of the wing. On the leading 20% I was creating them at 1/1000 of the chord length intervals to get a high resolution shape, and over the trailing 80% I was using 1/100 of the chord length intervals. The first couple of cuts I was using a chord length of about 100mm, meaning that my g-code statements around the leading edge where about 0.1mm apart or less, which caused the feedrate to slow down for some reason, which caused too much heat to build up in the leading edge. I re-processed the g-code to scale the chord up to 200mm, and remove any statements that where less than 1.0mm from the previous point and that seemed to do the trick. I am using 20ga nichrome-80 wire (about 2.5 Ohms/ft) and found so far that using about 2.2 amps of current and a feedrate of about 150mm/min gave pretty good results. My guess is that using a slightly higher temperature and faster feed rate would be better, but I need to lubricate the machine and fix some wobbles/stickies in my lead screws. I am using standard hardware store threaded rod, with the standard coupler nuts. Any idea what the best way to lubricate them is? I bought some lithium grease, but have not applied it yet. Next thing to do is to charactarize the kerf width and try some tapered sections. I will take some pictures of the machine when I get a chance and post them in the wiki. Ryan ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
