gene heskett wrote: > On Sunday, May 06, 2012 09:15:18 PM Jon Elson did opine: > > > >> you should be able to set up X and >> Z offsets for each tool in the tool table. >> > > That would require I get at least 3 or 4 more QC toolholders. But then I > am reminded that the QC post must be rotated in order to present the tool > to the work at the correct angle, which is only as repeatable as eyeballs > can make it. Well, if you don't use all the preset offsets, then you lose a great advantage of the lathe CNC system. Also, doing it all manually, you have to remember what tool is #1 in the tool table, etc. > OTOH, I do need more toolholders. I could make a setting > tool that would fix the reach out of each tool pretty consistent. But > before I tie a few hundred more up in holders for this flimsy post, my > first inclination is to ditch the whole compound slide since linuxcnc can > handle that rather nicely, and put a bigger, far more rigid QC post > directly on the X cross-slide. Something made out of real steel as opposed > to the crappy, flexible alu this QC is made out of. > Yeah, and then pretty soon you'll be lusting after an 8-station Barruffaldi CNC tool turret on eBay! > The thought also crosses my mind to mount a microswitch for homing that > could be dropped into a locator on the carriage, but that would require a > touchbar 3 inches long that was exactly on axis. The alignment to keep it > on axis while allowing it to swing out of the way, or be "unplugged" to get > it out of the way would be fairly stringent though > You can set your approximate Z work position by placing a tool in the way of the part and then pushing the bar through the chuck (or collet) until it hits the cutter. That's the "poor man's bar puller".
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