Re: [Emc-users] Home switches for LinuxCNC on a Lathe

2022-12-08 Thread John Dammeyer
Hi Leonardo, > > Just to clarify because sometimes it confuses me too. And please someone > correct me if I'm wrong: > > Positive and negative soft limits are always with respect to the 0 home > position. No matter where the home switch is located or if that 0 position > is aligned with the

Re: [Emc-users] Home switches for LinuxCNC on a Lathe

2022-12-08 Thread Leonardo Marsaglia
> > The G54 causes the DRO actual machine positions to be offset from the G53 > machine world coordinates. So do the soft limits use the part coordinate > system(G54) or the world coordinate system (G53)? I think G53. > Exactly, soft limits are based upon your origin of coordinates on the G53

Re: [Emc-users] Home switches for LinuxCNC on a Lathe

2022-12-08 Thread John Dammeyer
Thanks for the feedback. Here are the other two screen shots. One showing how the G54 is now applied to the tool position after the touch off so that now the POSition accurately reflects the work coordinate system. The other shows that I want to move in from 0.500" to 0.475" to do a 0.025"

Re: [Emc-users] Home switches for LinuxCNC on a Lathe

2022-12-08 Thread andy pugh
On Thu, 8 Dec 2022 at 07:37, John Dammeyer wrote: > I've done a bit more work on this. I've made an assumption that the home > switch is about 5" from the theoretical lathe centerline with a specific > tool inserted in a fixed holder. > I don't think that you need to worry about the machine

Re: [Emc-users] Home switches for LinuxCNC on a Lathe

2022-12-08 Thread Leonardo Marsaglia
It looks ok to me. But my recommendation is to forget about the distance between the home switch and the centerline. For example when I retrofitted the Mazak, I wired all the limits and home switches and when I was sure the hard limits worked I started playing around with the homing setup.