Pete , have you conneced spindle-enable ? this should stop the problem i use a second relay in the common line of the direction relay
theirs not so much information on turrets , although it can be done using classicladder , i find is easier to use a component and have linuxcnc know what tool is current via the feedback from the proximity switches .. see the components for the emco and triac toolchangers in the wiki , they can easily be changed to suit your particular type see Jt's page for using a turret as per his hcnc conversion . http://gnipsel.com to reverse homing use negative numbers in the homing section of the ini but beware it can get confusing if you change the major direction , so make sure the dro's count in the correct direction first On 17 September 2014 13:59, <p...@wpnet.us> wrote: > I have a Harrison T280 lathe I am retrofitting to LinuxCNC. This is a > stepper driven machine, the original controls were previously retrofitted > with MicroKinetics stuff and I'm re-retrofitting with LinuxCNC and Mesa > 5i25 / 7i76 while keeping the MK stepper drives. > > I did a clean install of 2.6.3 from a USB drive image. I'm new to LinuxCNC > and PnCConf and while I'm making progress getting things going I'm running > into a few issues I haven't yet found answers to in the docs I've found so > far. > > Issues so far: > > 1. The biggest issue currently - After some fiddling I have the Hitachi > VFD controlled spindle operating in the PnCConf open loop test where I am > able to run it forward and reverse at various speeds. I have the spindle > encoder connected (A and Index only, not sure on CPR currently) and in > HALscope I can see the A pulses and index pulse. I haven't been able to get > the spindle to operate in LinuxCNC however no matter what I've tried. > Another issue I have found is that when running in reverse and stopping, > LinuxCNC drops the direction line before the VFD has completed the decel > ramp, causing the VFD to slam the lathe into forward for the duration of > the decel, obviously not a desirable thing. > > 2. I've got the axis homing working in the direction it seems to want to > run, i.e. in the negative direction, however this seems like a bad idea on > a lathe to me. If I have a part in the spindle and need to re-home for some > reason, something not unexpected on a stepper machine, homing in the > negative direction will crash the toolpost into my part. It would seem > better to home in the positive direction and "zero" to the max travel of > the axis. I haven't figured out how to do this. > > 3. The lathe has an 8 position unidirectional stepper driven tool turret > with a home switch. I currently have the stepper drive wired to stepgen 2 > (0=Z, 1=X). I was able to configure an A axis so I can manually move the > torret, but I've not found any docs so far that give me much of a starting > point to figure out how to configure the tool turret properly for automatic > changes. > > Thanks, > > Pete C. > > > > ------------------------------------------------------------------------------ > Want excitement? > Manually upgrade your production database. > When you want reliability, choose Perforce > Perforce version control. Predictably reliable. > > http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ Want excitement? Manually upgrade your production database. When you want reliability, choose Perforce Perforce version control. Predictably reliable. http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
