Fusion 360 lathe post processor?

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05 Nov 2017 23:41 #101384 by Ross77
I'm have trouble finding a PP that works with G76. I got the latest one from Autodesk but keeps failing with the follow error message

Error: Threading not supported using synchronization of feed-spindle.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

I found the one on Github for g76 and the same error. Is it something I'm doing in fusion that is not setting it up correctly?

I tried the modified Tormach one and that does generate gcode but dosn't use g76 and failed to cut a thread when I ran it.

Cheers

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06 Nov 2017 19:49 #101458 by andypugh
The standard tormach slant_pro.cps file appears to use G76:
  switch (cycleType) {
  case "thread-turning":
    var r = -cycle.incrementalX; // positive if taper goes down - delta radius
    var threadsPerInch = 1.0/cycle.pitch; // per mm for metric
    var f = 1/threadsPerInch;
    writeBlock(
      gMotionModal.format(76),
      xOutput.format(x - cycle.incrementalX),
      yOutput.format(y),
      zOutput.format(z),
      conditional(zFormat.isSignificant(r), g92ROutput.format(r)),
      feedOutput.format(f)
    );
    return;
  }

Is that the one you are using?

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06 Nov 2017 19:51 #101459 by andypugh
The Autodesk postprocessor programming manual is here:
github.com/AutodeskCAM/Documentation/blo...manual-sm-130829.pdf

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07 Nov 2017 00:31 #101478 by Ross77
Hi Andy, No I cant get that to work either. Makes me think I have something wrong in fusion. this is the error using the tormach slant PP

Information: Configuration: Tormach Turning (Slant-PRO)
Information: Vendor: Tormach
Information: Posting intermediate data to 'C:\Users\User\AppData\Local\Fusion 360 CAM\nc\1001.nc'
Information: Total number of warnings: 1
Error: Failed to post process. See below for details.
...
Code page changed to '1252 (ANSI - Latin I)'
Start time: Tuesday, November 07, 2017 12:22:02 AM
Loading locale from 'C:\Users\User\AppData\Local\Autodesk\webdeploy\production\49d03f9fc343664d5942b9c34209b4f6b73c6c2d\Applications\CAM360\Data\Posts\common.en.lang'
Code page changed to '20127 (US-ASCII)'
Post processor engine: 4.2.1 41684
Configuration path: C:\Users\User\AppData\Local\Autodesk\webdeploy\production\49d03f9fc343664d5942b9c34209b4f6b73c6c2d\Applications\CAM360\Data\Posts\tormach slant-pro.cps
Include paths: C:\Users\User\AppData\Local\Autodesk\webdeploy\production\49d03f9fc343664d5942b9c34209b4f6b73c6c2d\Applications\CAM360\Data\Posts
Configuration modification date: Wednesday, October 04, 2017 1:31:08 PM
Output path: C:\Users\User\AppData\Local\Fusion 360 CAM\nc\1001.nc
Checksum of intermediate NC data: 10e9b9a96cc88a098f4bed7f95561320
Checksum of configuration: 0e429eda3c0636cde124aefd22a66e2a
Vendor url: www.tormach.com
Legal: Copyright (C) 2012-2017 by Autodesk, Inc.
Generated by: Fusion 360 CAM 2.0.3706
...
Warning: Work offset has not been specified. Using G54 as WCS.
Error: Threading not supported using synchronization of feed-spindle.
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Error: Failed to execute configuration.
Stop time: Tuesday, November 07, 2017 12:22:02 AM
Post processing failed.

I used the one posted on here "Linuxcnc_Lathe_20160430.cps" that uses the correct tool change for linux.

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08 Nov 2017 01:16 #101513 by Ross77
Think I may have solved it and it was user error. Doh

I just needed to check the "use Cycle" box in the passes box of the treading tool path in fusion

Thanks for the help, on to the next problem then.....

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