On 17 November 2017 at 21:14, chris <[email protected]> wrote:
> The idea is that you start you machine, home it , do some mill action or jog
> around and than when press the "home" bottom again, then pops out a window:
> "Axis is already homed, are you sure you want to re-homed?"
> if you then press "yes" the Machine do the home sequence again and tell you
> with a pop-window something like: " your home location now has a difference
> of 0.2xx from the last time of your home position"
I had a think about this, and came up with a userspace Python module to do this.
------------------------------------------------------
#!/usr/bin/python
import hal,time
import Tkinter
import tkMessageBox
root = Tkinter.Tk()
root.withdraw()
h=hal.component("home_logger")
old = {}
for a in ["x","y","z","a","b","c","u","v","w"]:
name = "%s-axis-motor-offset"%a
h.newpin(name, hal.HAL_FLOAT, hal.HAL_IN)
old[name] = 0
h.ready()
try:
while 1:
time.sleep(5)
for n in old:
if h[n] <> old[n]:
tkMessageBox.showinfo("Home Position Change:", \
"%s\nOld: %05f New: %05f Delta: %05f""" % (n, old[n], h[n],
h[n]-old[n]))
old[n] = h[n]
root.update()
except KeyboardInterrupt:
raise SystemExit
------------------------------------------------------
That needs to be saved as "home_logger" somewhere that LinuxCNC can
find it (like /usr/local/bin) and made executable.
You can then add a HAL file to connect it.
------------------------------------------------------
loadusr -W home_logger
net h1 axis.0.motor-offset home_logger.x-axis-motor-offset
net h3 axis.1.motor-offset home_logger.y-axis-motor-offset
net h3 axis.2.motor-offset home_logger.z-axis-motor-offset
------------------------------------------------------
Now, this wasn't working for me. It seemed to work if I started the
component from the command line, but loadusr -W was never seeing the
component become ready (despite the h.ready() command) so I am hoping
that somone else can explain that bit.
--
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
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