Can't use scribe in PlasmaC + Sheetcam.

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31 Oct 2022 23:01 #255618 by santy
Hello.
I have been trying to set up the scribe in PlasmaC. I have the M3 $1 line of code from the post processor, and a #1 tool defined, but it doesn't translate into the activation of the correct outputs. i have tested the outputs with a mill config, associated with mist/flood buttons, and they work. but not while reading a gcode file in PlasmaC. What is it i should do?

here are my config and gcode files. 

   

PS: Btw, this board ( 7i96s) has 5 outputs. i can use the 2 last outputs (4, and 5) which im currently using as relays to trigger the scribe piston and scribe ON, but i can't use the #1, #2, #3 (ssr outputs also), any tips on wiring them? should i use lower voltages?
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31 Oct 2022 23:13 #255619 by phillc54
You also need a tool change command to switch to the scribe and apply the offsets.

linuxcnc.org/docs/2.8/html/plasma/plasma...er-guide.html#scribe

AFAIK you should be able to use any of the outputs.

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31 Oct 2022 23:49 #255623 by santy
thank you so much. you solved my problem right away, i can now use the scriber!

by the way, do you have any idea on a best wiring method and voltage to use the ssr outputs? i can only use the relay opto-isolated ones.

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01 Nov 2022 00:18 #255624 by phillc54
Glad you got it going.

Is it possible you have the polarity the wrong way around on the SSR outputs?

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03 Nov 2022 12:28 #255839 by santy
i tried but they have resistance around 20k ohms.

how would you wire this outputs? im trying to find diagrams but keep failing.

im using 12v power supply for a 12v air valve, but the voltage always passes through the output pins.. whether it is on or off. the LED light turns on at the board correctly. the resistance changes from 0 to a high value, but not infinite.

should i use 5v? or more than 12?

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03 Nov 2022 22:23 #255872 by phillc54
I use 24V on my table, for switching a relay I have the following. 
+24V > relay coil
relay coil > SSR+
SSR- > 0V
I also have a flyback diode across the relay coil, not sure if it is required but it can't hurt.
 

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