# Enhanced Avid Post Processor for Fusion 360

**URL:** <https://forum.avidcnc.com/t/enhanced-avid-post-processor-for-fusion-360/5049>\
**Category:** Everything Lasers\
**Created:** [August 3, 2025, 3:08am UTC](https://forum.avidcnc.com/t/enhanced-avid-post-processor-for-fusion-360/5049 "2025-08-03T03:08:28Z")\
**Posts on this page:** 1\
**Showing post:** 11

<div class="post-metadata">

**Author:** ![WhiteRoomSkis](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.avidcnc.com/whiteroomskis/32/79_2.png) [@WhiteRoomSkis](https://forum.avidcnc.com/u/WhiteRoomSkis)\
**Post date:** [December 17, 2025, 2:06pm UTC](https://forum.avidcnc.com/t/enhanced-avid-post-processor-for-fusion-360/5049/11 "2025-12-17T14:06:12Z")

</div>

unfortunately in Mach 3 it is not as simple as just using M11/M10. I have a separate laser only machine 3 profile with many modification made to the configuration to make those commands work without any delay in firing the laser. This also requires a small breakout board to be added to your CNC controller this is outlined in the mach 3 set upI have attached. I made this profile many years ago after scouring Mach 3 and other forums for information. I don’t know if this will help you but it might help others who have Mach 3 and would like to use a laser attachment. I will also attach my apple scripts for GRBL-M3 and GRBL-NEW to convert these to something created in lightburn that Mach3 can use. This could very well be specific to my Endurance laser and how it interacts with Mach 3. I have never tested it with a different set up. Hopefully there is some value to it for you.

I have attached my set up guide for Mach 3. this is also posted in this forum in a different thread. I will add the link to the thread also. [Mach 3 set up thread](https://forum.avidcnc.com/t/laser-cut-on-cncrp-avid/846/14)

[Mach 3 set up.pdf](https://forum.avidcnc.com/uploads/short-url/2YAGbDQXKzguDSKo9D69ZTzBRL0.pdf) (372.9 KB)

I am not able to upload scripts to this thread. my laser script is pasted into this thread. [M3/M5 to M11/M10 apple script](https://forum.avidcnc.com/t/laser-cut-on-cncrp-avid/846). This is the apple script I use to convert GRBL-M3 in light burn for 100% power/cutting. I have a separate script that I use for fill tool paths or to use less than 100% power that works with GRBL-NEW. That script Adds M11PxSx commands above every G0 move to an fire or turn off the laser.

this apple script is pasted below as I can not upload the file. Again I’m not sure how much use this is but maybe it gives you some information or helps someone else. Feel free to use/modify this as needed if it is helpful to you. One day I will try to modify these further to see if I can get my system to output greyscale raster images but I have not yet had the time or motivation to try this. But this thread has be shining about this again.

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-- Choose the file to be modified using the Finder

**set** chosenFile **to**  **choose file** with prompt “Choose a file to modify:”

**set** fileReference **to**  **open for access** chosenFile **with** write permission

-- Initialize variables

**set** modifiedLines **to** {}

-- Define the text to be inserted

**set** insertLineAbove **to** “M10P2”

**set** insertLineBelow **to** “M11P2 S45”

-- Read and process the file line by line

**try**

```auto
-- Read the file line by line

**set** eofReached **to** *false*

**repeat**  **until** eofReached

	**try**

		-- Read the current line

		**set** currentLine **to**  **read** fileReference until "

```

"

```auto
		-- Check if the line contains "G0"

		**if** currentLine **contains**"G0" **then**

			-- Add M10P2 one line above the G0 command

			**set**  **end**  **of** modifiedLines **to** insertLineAbove

			**set**  **end**  **of** modifiedLines **to** currentLine

			-- Add M11P2 S30 one line below the G0 command

			**set**  **end**  **of** modifiedLines **to** insertLineBelow

		**else**

			-- Keep the line unchanged

			**set**  **end**  **of** modifiedLines **to** currentLine

		**end**  **if**

	**on**  **error**

		-- End of file reached

		**set** eofReached **to** *true*

	**end**  **try**

**end**  **repeat**

-- Close the file

**close access** fileReference

-- Combine the modified lines into a single string

**set** modifiedText **to** (*items* 1 **thru** -2 **of** modifiedLines) **as** *text*

-- Write the modified text back to the file

**set** fileReference **to**  **open for access** chosenFile **with** write permission

**set eof**  **of** fileReference to 0

**write** modifiedText to fileReference

**close access** fileReference

**display dialog**"File successfully modified and saved." buttons {"OK"} default button "OK"

```

**on**  **error** errMsg

```auto
-- Handle any errors that occur

**try**

	**close access** fileReference

**end**  **try**

**display dialog**"Error: " & errMsg buttons {"OK"} default button "OK"

```

**end**  **try**

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