On Wed, 21 May 2014 08:31:19 -0400, you wrote:
>Since lcnc has no clue about the ballistics of the reverse, and therefore >cannot predict the over travel, I'm not sure there can be a fix for that >other than setting the -limit well into the chuck. My neg working units limit is often well into the spindle - cant bore/drill etc inside the chuck otherwise. I have a moveable limit switch on the spindle end of the bed and a home/limit switch on the base of the tailstock where the saddle hits it. However - I don't use home in LinuxCNC, it's not lathe friendly - I have no homing set in ini. Limit switches are enabled though. I simply zero on the end of the work. Just have to remember to leave enough stuck out the chuck so the tool don't hit it on external turning/threading and parting off. The end of the stock is my master datum point Z0. Everything else relies on that. CAM sorts out the tool change position for each tool and the start/finish "at rest" position. My tool table in CAM is set up. It's all zero's in LinuxCNC. CAM knows the shape, working length and overhang for each tool. (plus lots of other params) and works out tool paths using all these parameters. Frightens me at times when the tool misses the end of the job by tiny amounts - I have it set to adjust them as work diameter/length changes during the job if I am making a lot of parts - saves time. Steve Blackmore -- ------------------------------------------------------------------------------ "Accelerate Dev Cycles with Automated Cross-Browser Testing - For FREE Instantly run your Selenium tests across 300+ browser/OS combos. Get unparalleled scalability from the best Selenium testing platform available Simple to use. Nothing to install. Get started now for free." http://p.sf.net/sfu/SauceLabs _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
