I had this same problem and wanted to use MDI to move the table and Z
axis to make the tool change and zero the Z axis. Leslie Newell created
a revised hal_manualtoolchange which I have attached. The exchanges
that explain it were under "Using MDI during a Program?" starting about
june 24 09 should be in the Archives. I guess we need to get it on the
Wiki sometime. This works very nicely for me. Since MDI keeps track of
the location when you hit continue it moves to the proper locations and
continues. Some time I forget to rezero the Z axis so I started doing
to make a mdi z move to verify that everything is as planned before
hitting continue. Also make sure when you zero that you are in state.
The zeroing dialog defaults to G54 when quite often you are working in
G55 so you need to set it to G55 to correctly set the offset.
Hubert
Michael Grundvig wrote:
Note: I posted this on CNCzone.com last night, but I think I'll get a better
response here. Sorry for the cross-post.
I feel like a fool but I don't get the trick with tool-changing. I use CamBam to create
the gcode for a series of operations that require a couple of different endmills. I
assign them different tool IDs as part of the process. When I run the gcode, EMC2 prompts
me to change the bits mid-operation at the right time as expected. It gives me the little
"change the tool" dialog with a continue button. Pressing the continue button
causes things to continue as expected.
The problem is that I don't have control over the machine at that point to
actually change the endmill. I need to raise the z-axis to get the endmill into
the collect and then I need to touch off the z-axis. Any help or walk through
of this process would be great as it's currently driving me crazy.
I've tried pausing the operation with the dialog up but I still don't get
manual control. I've also tried stopping the operation but I can't figure out
how to get it to resume at the line where it left off properly. I know this is
probably something super simple and I'm being a fool but it's got me stumped.
I've heard reference of a "go to line" ability somewhere but I've not seen how
to use it. It seems horrible that I can't touch off in the middle of a running program.
This is pretty critical for those of us that don't have a tooling that can be established
in a tool table. I know this is available in Mach3.
Apparently there is also a "tool change position" that can be set somewhere -
I'm assuming that can't be done via the Step Conf wizard so it must be in one of the
configuration files. Setting it will be of little use if I can't conveniently resume the
same file again.
Any help is greatly appreciated! Thanks!
-Mike
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#!/usr/bin/python
import sys, os
import gettext
BASE = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), ".."))
gettext.install("axis", localedir=os.path.join(BASE, "share", "locale"),
unicode=True)
import emc, hal
import rs274.options
iniFile = emc.ini(os.environ['INI_FILE_NAME'])
emc.nmlfile = os.path.join(os.path.dirname(os.environ['INI_FILE_NAME']),
iniFile.find("EMC", "NML_FILE"))
emcStat = emc.stat();
emcCmd = emc.command()
def do_change(n):
emcStat.poll()
curLine = emcStat.current_line
if n:
message = _("Insert tool %d and click continue when ready") % n
else:
message = _("Remove the tool and click continue when ready")
app.wm_withdraw()
app.update()
if curLine >=0:
emcCmd.abort()
h.changed = True
app.tk.call("nf_dialog", ".tool_change",
_("Tool change"), message, "info", 0, _("Continue"))
if curLine >=0:
emcCmd.mode(emc.MODE_AUTO)
emcCmd.auto(emc.AUTO_RUN, curLine + 1)
else:
h.changed = True
app.update()
h = hal.component("hal_manualtoolchange")
h.newpin("number", hal.HAL_S32, hal.HAL_IN)
h.newpin("change", hal.HAL_BIT, hal.HAL_IN)
h.newpin("changed", hal.HAL_BIT, hal.HAL_OUT)
h.ready()
import Tkinter, nf, rs274.options
app = Tkinter.Tk(className="AxisToolChanger")
app.wm_geometry("-60-60")
app.wm_title(_("AXIS Manual Toolchanger"))
rs274.options.install(app)
nf.start(app); nf.makecommand(app, "_", _)
app.wm_protocol("WM_DELETE_WINDOW", app.wm_withdraw)
lab = Tkinter.Message(app, aspect=500, text = _("\
This window is part of the AXIS manual toolchanger. It is safe to close \
or iconify this window, or it will close automatically after a few seconds."))
lab.pack()
def withdraw():
app.wm_withdraw()
app.bind("<Expose>", lambda event: app.wm_withdraw())
app.after(10 * 1000, withdraw)
try:
while 1:
change = h.change
if change and not h.changed:
do_change(h.number)
elif not change:
h.changed = False
app.after(100)
app.update()
except KeyboardInterrupt:
pass
------------------------------------------------------------------------------
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