External Coolant Controls

davidimurray
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5 years 2 months ago #217835 by davidimurray

External Coolant Controls was created by davidimurray

Hi All

After a hiatus, I'm back working on my new lathe. Having done some setup on the bench in Linuxcnc, I am now working on moving various functions into PP.

One thing I'm looking to do is add some external controls - in addition to the software controls. I can get either the external control, or the on-screen buttons to work. But not both together. Any help would be appreciated

Looking in the UI file - it appears PP looks at tormach.coolant-iocontrol

Code:

def on_coolant_button_release_event(self, widget, data=None):
        # POSTGUI_HALFILE contains:
        # net coolant-flood tormach.coolant => parport.0.pin-14-out
        # net coolant-flood-io iocontrol.0.coolant-flood => tormach.coolant-iocontrol
        # The UI code here watches tormach.coolant-iocontrol for changes from LinuxCNC.
        # See the periodic handler for details
        if not self.is_button_permitted(widget): return
        self.window.set_focus(None)
        # disable coolant lockout : if user commands coolant, do it immediately
        self.coolant_lockout = 0
        # use our tormach.coolant HAL pin to track actual coolant state
        coolant_on = self.hal['coolant']
        if not coolant_on:
            self.hal['coolant'] = 1
        else:
            self.hal['coolant'] = 0

In the postgui file I have the following. The last two line are the original PP code. As shown, the code switches my coolant relay with the external switch but on-screen does not work. If I uncomment the original code - it complains about more than one pin being connected to the signal.

Code:

#coolant toggle section#
loadrt toggle2nist count=1
loadrt edge count=1
addf toggle2nist.0 servo-thread
addf edge.0 servo-thread
net coolant-flood  <=  iocontrol.0.coolant-flood

# Coolant switch
net flood-button <= hm2_7i76e.0.7i76.0.0.input-06 => edge.0.in 
net button-edge <= edge.0.out => toggle2nist.0.in 
net flood-on <= toggle2nist.0.on => halui.flood.on 
net flood-off <= toggle2nist.0.off => halui.flood.off
net flood-control <= halui.flood.is-on => toggle2nist.0.is-on

#original tormach code below here
#net coolant-flood tormach.coolant
#net coolant-flood-io iocontrol.0.coolant-flood => tormach.coolant-iocont

Any ideas would be much appreciated.

Thanks

Dave

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nkp
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5 years 2 months ago #217840 by nkp

Replied by nkp on topic External Coolant Controls

Code:

        self.hal = hal.component("tormach")
        self.hal.newpin("coolant", hal.HAL_BIT, hal.HAL_OUT)
        self.hal.newpin("coolant-iocontrol", hal.HAL_BIT, hal.HAL_IN)
        self.hal.newpin("coolant-tgbutton", hal.HAL_BIT, hal.HAL_IN) #nkp

Code:

         # initial hal states:
        self.prev_coolant_iocontrol = self.hal['coolant'] = 0
        self.prev_coolant_tgbutton  = 0 #nkp https://forum.linuxcnc.org/pathpilot/43326-external-coolant-controls

Code:

          if self.prev_coolant_iocontrol != self.hal['coolant-iocontrol']:
            if self.hal['coolant-iocontrol']:
                self.hal['coolant'] = 1
            else:
                self.hal['coolant'] = 0
            # current becomes previous
            self.prev_coolant_iocontrol = self.hal['coolant-iocontrol']

        # nkp https://forum.linuxcnc.org/pathpilot/43326-external-coolant-controls
        if self.prev_coolant_tgbutton != self.hal['coolant-tgbutton']:
            if self.hal['coolant-tgbutton']:
                self.hal['coolant'] = 1
            else:
                self.hal['coolant'] = 0
            # current becomes previous
            self.prev_coolant_tgbutton = self.hal['coolant-tgbutton']

Code:

net coolant-flood     tormach.coolant           => parport.0.pin-14-out
net coolant-flood-io  iocontrol.0.coolant-flood => tormach.coolant-iocontrol

net tgb  tormach.coolant-tgbutton

loadusr sim_pin    tgb

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andypugh
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5 years 2 months ago #217881 by andypugh

Replied by andypugh on topic External Coolant Controls

I use a 3-position switch and a mux component for this.
In the central "auto" position the mux passes through the iocontrol.0.coolant-flood signal.
Then the off input is simply setp to 0, and on to 1. So I can either leave the coolant under software control, or force it on or off.

(Note that this is done with a mux-generic component, that can be configured for bit-type signals.)

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davidimurray
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5 years 2 months ago #217915 by davidimurray

Replied by davidimurray on topic External Coolant Controls

Thanks nkp - I tried for a few hours to get the code to work but I could not get it to switch with the external switch.

Andy - being cheeky would you have a sample of the code you use. I am a relative newbie to HAl and tried tonight to use mux-generic but think I confused myself!

Thanks both

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andypugh
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5 years 2 months ago #217916 by andypugh

Replied by andypugh on topic External Coolant Controls

Code:

loadrt mux_generic config="bb4"
addf mux-gen.00 servo-thread

net coolant-off hm2_7i84.008a.input-25 => mux-gen.00.sel-bit-00
net coolant-on hm2_7i84.008a.input-26 => mux-gen.00.sel-bit-01
net coolant-flood mux-gen.00.out-bit => hm2_7i84.008a.output-08
net coolant-auto iocontrol.0.coolant-flood => mux-gen.00.in-bit-00
setp mux-gen.00.in-bit-01 0
setp mux-gen.00.in-bit-02 1
setp mux-gen.00.in-bit-03 0

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davidimurray
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5 years 2 months ago #218176 by davidimurray

Replied by davidimurray on topic External Coolant Controls

Thanks Andy

I've been having a play and can get the external switch working, but not with the onscreen button. After some work, I;ve got HALshow working. And looking at the pins tormach.coolant seems to be the one that changes with the onscreen button.

I've tried changing
net coolant-auto iocontrol.0.coolant-flood => mux-gen.00.in-bit-00
to
net tormach.coolant => mux-gen.00.in-bit-00
but that doesn't work - any ideas much appreciated.

Thanks

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