Perhaps I misunderstand but multi-spindle drill presses were once very common. They allowed one to drill several holes in the same time as drilling only one. The same could certainly apply to milling.
> -----Original Message----- > From: John Dammeyer [mailto:jo...@autoartisans.com] > Sent: Sunday, September 16, 2018 11:48 AM > To: 'Enhanced Machine Controller (EMC)' > Subject: Re: [Emc-users] Multi-spindle support > > Isn't it more in keeping with G-Code to do the equivalent of setting a mode. > For example we set Relative or Absolute and from then on all motion is done > that way. > > So why not an Mxxx.yyy to set currently active spindle. At that point > G-Code > remains the same with no incompatibility with any of the CNC CAM programs. > Changing Active Spindles would not set active spindle speed to 0. It's left > in > the mode after the last command. > > I'm not sure why there would ever be a need to have two spindles turning at > the same time. An example of where that might be useful would be > interesting. > > Or modify the tool selection process. > Select Tool # 990, 991 or 992 to lock in a spindle. Then Tool 1 for that > spindle. > Again, existing CAM software just sees a G-Code sequence for Tool Selection. > > I prefer the Mxxx.yyy technique. > > John Dammeyer > > > > -----Original Message----- > > From: andy pugh [mailto:bodge...@gmail.com] > > Sent: September-16-18 6:57 AM > > To: EMC developers; Enhanced Machine Controller (EMC) > > Subject: [Emc-users] Multi-spindle support > > > > After some consultation with the release manager I have decided to > > push multi-spindle support in to the current development branch. > > A side-effect of this is that motion.spindle.xxxx pins all become > > spindle.0.xxxxx pins. (and so on for extra spindles.) When I push it > > this will be added as a refinement to the update_ini automatic script > > so configs should update automatically. > > > > To add more spindles just add "num_spindles=" to the end of the > > "loadrt motmod" line in HAL, and add a [TRAJ]SPINDLES to the INI. It > > is imperative that these match or trouble will ensue. > > > > The spindle to use is controlled by the $ character (as all the other > > letters were in use). This doesn't match any commercial control, but > > should make remapping to match any specific control relatively easy. > > > > The current behaviour of LinuxCNC is that spindles have a speed even > > when off. To see this try M3 S100 followed by M5, then M3 with no > > S-word. You will see that the spindle re-starts with the previous > > speed. > > > > This becomes rather more obvious with multi spindle. > > S10 $0 > > S100 $1 > > S1000 $2 > > Will set the speeds of each spindle, but not start them. > > Then > > M3 > > will start them all simultaneously. M4 will reverse them all. M5 will > > stop them all. > > > > M4 $2 will only reverse spindle 2 > > M5 $1 will only stop spindle 1. > > > > G76 $1 ..... will perform a threading cycle synched to the encoder > > feedback on the spindle.1.revs pin. > > > > A preview version (merged with current master) can be tried in the > > "andypugh/multispindle-master" branch. > > > > Questions... > > What should be the effect of a $ on a line by itself? > > > > Should we allow multiple $? eg M5 $0 $2 to stop two spindles? At the > > moment there is an internal concept of "current spindle". Perhaps > > there should instead be a spindle mask and $ should be interpreted to > > set this mask prior to parsing the S and F words in the block. > > > > Has anyone used multi-spindle G-code on a different control? > > > > -- > > atp > > "A motorcycle is a bicycle with a pandemonium attachment and is > > designed for the especial use of mechanical geniuses, daredevils and > > lunatics." > > ? George Fitch, Atlanta Constitution Newspaper, 1916 > > > > > > _______________________________________________ > > Emc-users mailing list > > Emc-users@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
