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Holding a pin on?

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12 Jan 2019 19:35 #124039 by Matthew_Jones
My machine is a HY-TB5 5 axis Chinese machine that come ready with Mach 3 instruction for setup. There was another post somewhere on the forums but no one gave a complete setup.
I have been running it on Mach for 2 years almost, so everything is functional.

I have went through and tried the MACH.xml converter but it seemed to have the wrong settings especially in the motor settings so I did a custom. When the motor was set I do not get action from the motor but the motor audibly engages and the breakout board with its on board readout is getting the signal.

The best I can tell I have relay on the stepper driver that needs to be engaged so the power can get through. This requires a 5 volt input on pin 14 of the parallel port. Mach 3 had setting for it PORT1 Pin14 high. When it came time to mill it just came on, then went off after the code ran.

I tried this:
net relay-enable.power-on => parport.0.pin-14-out
In my Custom.hal. No resolve, but it looks like that just tells the pin its an OUT.

How do I tell it to turn the pin on and keep it on?? Still to new to all this to quite understand the docs but I am not sure that I even found what I was looking for.

Thanks
Matt

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12 Jan 2019 21:07 - 12 Jan 2019 21:08 #124043 by PCW
Replied by PCW on topic Holding a pin on?
That statement links (wires) the "relay-enable.power-on" signal
to the pin "parport.0.pin-14-out" so "parport.0.pin-14-out"
will follow the state of "relay-enable.power-on"

For this to be of any use, some other pin must drive the signal "relay-enable.power-on"

Note that signal names (like "relay-enable.power-on") are arbitrary, they have no intrinsic meaning so "relay-enable.power-on" could be replaced with "Blue_White_Wire" everywhere in the hal file(s) and the operation would be unchanged.
Last edit: 12 Jan 2019 21:08 by PCW.

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12 Jan 2019 21:15 #124044 by OttoDidact
Replied by OttoDidact on topic Holding a pin on?
In stepConfig on the pin assignment page, for pin 14 select "Amplifier Enable"

Easy peasy.

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12 Jan 2019 21:49 #124047 by Matthew_Jones
Replied by Matthew_Jones on topic Holding a pin on?
I am confused but I think I follow you. Would you mind giving me the process for holding pin 14 on while linuxcnc is running? I have been trying to find an example but with no resolve.
I know it has to turn on for the drivers to work because I went through something similar running mach3 on a laptop that had 3.2v signal. The relay wouldn't engage. 5v needed.
Linux is daunting but I know I can do it sooner or later. I just have to run across enough challenging problems then I'll eventually come around.

Thanks
Matt

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12 Jan 2019 21:50 #124049 by Matthew_Jones
Replied by Matthew_Jones on topic Holding a pin on?

OttoDidact wrote: In stepConfig on the pin assignment page, for pin 14 select "Amplifier Enable"

Easy peasy.


Your message came in while I was replying.

Thanks a bunch I'll try it.

Matt

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12 Jan 2019 21:56 #124050 by Matthew_Jones
Replied by Matthew_Jones on topic Holding a pin on?
Ya that did it. I have to work on my stepper config a bit everything is moving real slow but at least its moving and looks to be in line with whats on the screen.

Thanks a bunch both of you.
Matt

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14 Jan 2019 00:32 #124124 by cmorley
Replied by cmorley on topic Holding a pin on?
just to add for completeness:
If someone requires an always-on-pin for say testing - you can invert the pin in stepconf and it will be on when linuxcnc is loaded.

Chris M

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14 Jan 2019 00:55 #124128 by Matthew_Jones
Replied by Matthew_Jones on topic Holding a pin on?
Well actually thats the first thing I tried, both invert and non invert neither worked. "Amplifier on" worked. Not sure what the difference was but just setting the pin as an OUT isn't enough.

When this is done I am going to document this machine because I think they are conman and they need to move to this Linuxcnc system before even just making it easy on themselves using mach 3.

Thanks all.
Matt

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14 Jan 2019 01:19 #124130 by cmorley
Replied by cmorley on topic Holding a pin on?
Right, Should have said if you pick say digital output (that you don't need) and invert it that should work.

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