On 01/31/2011 12:08 PM, gene heskett wrote: > >> I was suggesting using your gantry as a planer head. >> > So would I, but first, because its alu, I have to ask: Is is alu for some > reason related to interaction with the bamboo?, or just for the expediency > of construction? > > I would, because the alu will eventually wear, consider overlaying the alu > with twin strips of steel, epoxied to the alu bed so that the vacuum slot > is not effected, but raised by the thickness of the steel strip. This > would, I think, give a longer wearing surface after the top of the strips > were ground dead flat to whatever sag may be in the carriage rods, using > the gentle touch of a drill doctor wheel to do the actual grinding. > > That would of course bring up the thermal effects on the flatness as it > would probably only be truly true to the carriage at only one temperature, > tending to warp up and down with the thermometer reading. I can think of > ways to control that, all of which are a bigger PIYA though. > > Grinding the alu to flat is not a workable idea because of alu's tendency > to plug up the grinding wheel, not even the drill doctor wheel would be > immune to that. Thought, flood the alu with k1, lots of it, recycling the > runoff, and still use the drill doctor diamond wheel, but turning slowly > enough so as not to throw the K1 all over. This should help prevent the > wheel from plugging up to a large extent by keeping its surface wet. Move > the carriage slowly, say 2-4 hours to make one pass, feed it a thou closer > and retrace, repeat till a clean cut is obtained. > > I have no idea how long an aquarium pump would last pumping k1, but that > should be an ample flow rate to keep the area flooded and clean. You > would, with the diamond wheel, be cutting an un-oxidized surface once the > initial cut has been made, or as least an only slightly oxidized surface > due to the oxygen reduction the film of k1 assures, making the wear of the > diamonds much less. > > Can you show us a piccy of this track from the end on view? With a tape > measure for scale? >
Okay, here's some pics of the hold-down bed and the cutting head. First, an unadulterated pic of the hold-down bed: > http://farm6.static.flickr.com/5217/5407421436_d806332728_b.jpg Next, with Gene's tape measure... ;-): > http://farm6.static.flickr.com/5011/5407421544_6c86112d0d_b.jpg Quick and dirty view of the cutting head: > http://farm6.static.flickr.com/5293/5407421640_9da64c20c4_b.jpg And last but not least, the entire cutting head: > http://farm6.static.flickr.com/5254/5407421742_99bee52187_b.jpg I've got about 70% of it draw filed and scraped. I'm gonna need Gene's hydraulic can crusher with all the spinach I've been eating. ;-) Mark ------------------------------------------------------------------------------ Special Offer-- Download ArcSight Logger for FREE (a $49 USD value)! Finally, a world-class log management solution at an even better price-free! Download using promo code Free_Logger_4_Dev2Dev. Offer expires February 28th, so secure your free ArcSight Logger TODAY! http://p.sf.net/sfu/arcsight-sfd2d _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
