Auto Start Vacuum

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toddgrundman
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New Member

21 Dec 2016 16:19 #84496 by toddgrundman

Auto Start Vacuum was created by toddgrundman

I have been using makercam.com for some simple gcode generating. I have not found a way to have it insert an M8 into the beginning of the code to turn on the vacuum table.

So, I am looking for some help on writing a script to insert M8 using the FILTERS, or just a way to have the vacuum start with every job that LinuxCNC runs.

Thanks for any help you can provide!

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Todd Zuercher
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Platinum Member

21 Dec 2016 17:58 - 21 Dec 2016 18:03 #84507 by Todd Zuercher

Replied by Todd Zuercher on topic Auto Start Vacuum

I have a simple script filter that I use on some machines to insert the pre/post-ambles to allow some generic g-code to work on several machines.
The echo lines will be inserted at the beginning and end.

#!/bin/bash

echo "%"
echo "G92.1 G54 G49 G17"
echo "M111"
echo "G53 G0 Z0"
echo "G90"
echo "G64 P0.005"
echo "F80"
echo "M3 S18000"
echo

# The main part
sed -n 'p' "$1"

echo
echo "G0 Z1"
echo "M123"
echo "G53 G0 Z0 W0"
echo "G53 G0 X0 Y65"
echo "G49 G92.1"
echo "M5"
echo "M30"
echo "%"

Just save the script as something.sh (like pre-post.sh), move it someplace such as your config dir. Change the files permission to make it executable. Then in your ini file under the [FILTER] section add the line ngc = /(path to file loacation)/something.sh

You can also do find and replaces and what ever else you can dream up. A script that just finds one line that you always have at the beginning of the file and adds your M8 code might be even simpler (just a single sed line.)

Last edit: 21 Dec 2016 18:03 by Todd Zuercher.

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