Easy way to output analog voltage

[Mcasey]

Hi guys,

I have what I hope should be fairly straightforward, I just want a way that I can output a analog voltage thru gcode. Is there a simple way to do this? It's a 300eth I'm using, just want something like MXXX 5 would be 5v output, I've been trying to do this using the spindle PWM, but just can't get it to work

[dezsoe]

You can set var# -> analog out to a variable that is not 0, e.g. 1. Then in the g-code write #1=nnn where nnn is 0 to 65535 proportional to 0 to 10V.

[Mcasey]

I don't quite understand how to use variables, I thought they were used just for calculations, the manual is a bit vague on these, this was my understanding from the manual

The following code example shows how to use the variables:
#1 = 5 (Sets the value of variable #1 to 5)
#2 = 10 (Sets the value of variable #2 to 10)
G0 X#1 Y#2 Z1 (Moves the axis with rapid to coordinates X=5, Y=10, Z=1)
#2 = 1.5 (Sets the value of variable #2 to 1.5)
G1 X#1 Y#2 Z#2 (Moves the axis with set feedrate to coordinates X=5, Y=1.5,
Z=1.5)
#3 = #1 + #2 (Sets the value of variable #3 to 6.5)
#4 = 100 (Sets the value of variable #4 to 100)
G1 X#3 F#4 (Moves the axis with set feedrate of 100 unit/min to coordinates
X=6.5)
Typing ?#4 into the MDI will return the value stored within variable #4 to the
status message box on screen.

How can I use this to say put 5v for example on the analog pin 6 or 7? Sorry I'm just a little lost with this

[Mcasey]

Is it just type #1=32767, because I can't get this to work

[cncdrive]

Yes, you type it just like how you wrote, but to make that work you first have to attach var number 1. to an analog output channel in the configuration.

[Mcasey]

got it, thanks for the help guys.