The spindle runs properly (except for the sudden reverse issue) in the PnCConf open loop test. Enable, direction and control voltage all work peoperly, I can change the control voltage output and get the expected speeds from the VFD. There seems to be some disconnect / misconfig in getting it to LinuxCNC. I'm also anything but clear on the settings for the spindle encoder (A and Index) for threading.
The toolpost is low on my priority list at the moment since I can hack it and control via the pseudo-A axis enough to change tools for now. Really just advance it enough degrees to get past the ratchet pawl, then back up a bit to seat on the pawl (and stall the stepper). I tried to get it to home in the positive direction and that works to a point, but it wants to make that home location zero instead of the max axis travel such as 18.0 and as a result if the home position is set as 18 it will just blindly run away looking for that in the positive direction to overtravel. It needs to find home and set that location *as* 18 and call it good, not set as 0 and look for 18. Thanks, Pete C. ------Original Mail------ From: "David Armstrong" <cncbas...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Wed, 17 Sep 2014 14:38:31 +0100 Subject: Re: [Emc-users] New to LinuxCNC and PnCConf and need some help... 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 ------------------------------------------------------------------------------ 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
