Unable to resolve coolant momentary switch issue
05 Aug 2017 12:59 #97028
by IIOII
Unable to resolve coolant momentary switch issue was created by IIOII
I'm new to LinuxCNC and I'm having difficulty getting the following setup to work.
I'd like the coolant to turn on or off using either the Axis checkbox or an external momentary switch.
What's the best way?
I'd like the coolant to turn on or off using either the Axis checkbox or an external momentary switch.
What's the best way?
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- Todd Zuercher
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06 Aug 2017 04:21 #97059
by Todd Zuercher
Replied by Todd Zuercher on topic Unable to resolve coolant momentary switch issue
There are halui pins for controlling coolant (flood and mist). They are separate three separate pins for both, on, off, and a status pin. You can use some hal logic to control them using a single momentary input,.
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06 Aug 2017 12:15 #97066
by IIOII
Replied by IIOII on topic Unable to resolve coolant momentary switch issue
I've been troubleshooting the below code without success. When the momentary switch is pressed, the coolant is turned on, but unable to turn off again. Any suggestions on how to rectify?
loadrt toggle2nist count=1
addf toggle2nist.0 servo-thread
#Seems these need to be here to keep check boxes visible
net coolant-flood <= iocontrol.0.coolant-flood
# Coolant switch
net flood-toggle toggle2nist.0.in <= hm2_7i76e.0.7i76.0.0.input-27
net flood-on toggle2nist.0.on => halui.flood.on
net flood-off toggle2nist.0.off => halui.flood.off
# Coolant LED control
net flood-control halui.flood.is-on => hm2_7i76e.0.7i76.0.0.output-14Please Log in or Create an account to join the conversation.
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07 Aug 2017 03:18 #97090
by Todd Zuercher
Replied by Todd Zuercher on topic Unable to resolve coolant momentary switch issue
I'm not sure that the Toggle2NIST component is the right tool for the job. (at least by it's self.) Toggle2NIST holds it's output pins true between button presses. What might be a better option is to just use a couple of and2 comps, a not, and maybe a oneshot (or edge).
The idea being a button press and the coolant on pin true, sends a pulse to the coolant off pin, and Similarly a button press and a coolant-on-not pin true would send a pulse to the coolant on pin.
When ever I try, this sort of hal logic, it always seems to end up much more complicated than it appears at first glance on the surface.
The idea being a button press and the coolant on pin true, sends a pulse to the coolant off pin, and Similarly a button press and a coolant-on-not pin true would send a pulse to the coolant on pin.
When ever I try, this sort of hal logic, it always seems to end up much more complicated than it appears at first glance on the surface.
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07 Aug 2017 05:49 #97093
by rodw
Thats why I think that making a custom component is often so much easier. What you can do in 2-3 lines in C can take half a page in hal.
This is probably LinuxCNC's best kept secret.
Replied by rodw on topic Unable to resolve coolant momentary switch issue
When ever I try, this sort of hal logic, it always seems to end up much more complicated than it appears at first glance on the surface.
Thats why I think that making a custom component is often so much easier. What you can do in 2-3 lines in C can take half a page in hal.
This is probably LinuxCNC's best kept secret.
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07 Aug 2017 13:47 #97104
by Todd Zuercher
Replied by Todd Zuercher on topic Unable to resolve coolant momentary switch issue
Easy peasy, if your fluent in C. I'm not, so I just muddle along stringing together hal commands.
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07 Aug 2017 23:02 #97132
by IIOII
Replied by IIOII on topic Unable to resolve coolant momentary switch issue
I've written some similar logic in Lua for a previous Mach4 build, so the logic and code should be somewhat similar in C. What's the process for creating and compiling a custom C component? Alternatively, does anyone have some hal logic they could share to achieve the required result?
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08 Aug 2017 03:01 #97156
by rodw
If you drop in on the plasma and laser section on this forum, there are several components I've written. Use them as an example.
This is a simple one. forum.linuxcnc.org/plasma-laser/32657-th...-indicator-component
Then its just as simple as typing "halcompile --install mycomponent.comp"
And the component is compiled and installed for you.
Just remember your component is being called every time the servo loop is called. Don't do any loops, just wait until the next pass through.
Replied by rodw on topic Unable to resolve coolant momentary switch issue
I've written some similar logic in Lua for a previous Mach4 build, so the logic and code should be somewhat similar in C. What's the process for creating and compiling a custom C component? Alternatively, does anyone have some hal logic they could share to achieve the required result?
If you drop in on the plasma and laser section on this forum, there are several components I've written. Use them as an example.
This is a simple one. forum.linuxcnc.org/plasma-laser/32657-th...-indicator-component
Then its just as simple as typing "halcompile --install mycomponent.comp"
And the component is compiled and installed for you.
Just remember your component is being called every time the servo loop is called. Don't do any loops, just wait until the next pass through.
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08 Aug 2017 14:27 - 08 Aug 2017 14:31 #97174
by Todd Zuercher
Replied by Todd Zuercher on topic Unable to resolve coolant momentary switch issue
This will work with the toggle2nist, it just needs to be connected right and maybe an edge, added.
loadrt toggle2nist count=1
loadrt edge count=1
addf toggle2nist.0 servo-thread
addf edge.0 servo-thread
#Seems these need to be here to keep check boxes visible
net coolant-flood <= iocontrol.0.coolant-flood
# Coolant switch
net flood-button <= hm2_7i76e.0.7i76.0.0.input-27 => 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
# Coolant LED control
net coolant-flood => hm2_7i76e.0.7i76.0.0.output-14
Last edit: 08 Aug 2017 14:31 by Todd Zuercher.
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08 Aug 2017 17:08 #97190
by andypugh
linuxcnc.org/docs/2.7/html/hal/comp.html
For fun you could use LUT5, with inputs from the button, halui.coolant.is-on and the iocontrol coolant pins.
LUT5 is especially good fun when you feed its own output back as an input. But it does tend to make for rather "write once" HAL code.
Replied by andypugh on topic Unable to resolve coolant momentary switch issue
What's the process for creating and compiling a custom C component?
linuxcnc.org/docs/2.7/html/hal/comp.html
For fun you could use LUT5, with inputs from the button, halui.coolant.is-on and the iocontrol coolant pins.
LUT5 is especially good fun when you feed its own output back as an input. But it does tend to make for rather "write once" HAL code.
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