Error: REWIND: Rewind of machine is required for simultaneous multi-axis toolpath

[AllanRidesBikes]

This is unreal! I buy the machining extension, post a rotary toolpath, run the part and then want to change the WAY THE PART GETS CUT OFF, and nothing else......

Error: REWIND: Rewind of machine is required for simultaneous multi-axis toolpath and has been disabled.
Beyond upset at this!
I had this problem the last time I bought a month of the machining extension also with no resolve.

Haas ST20Y machine. 

I searched again for how to fix this in the post and can't seem to find anything like what it says on the support post:

https://knowledge.autodesk.com/support/fusion-360/troubleshooting/caas/sfdcarticles/sfdcarticles/How...

https://forums.autodesk.com/t5/fusion-360-manufacture/going-along-just-fine-then-rewind-error-haas-s...

Please help. My blood is boiling right now!

[seth.madore]

What post processor are you using, and can you share a simple Fusion file that would demonstrate this issue? Is the problem found at toolpath creation, post processing, or actually at the machine?

[AllanRidesBikes]

@seth.madore 
The problem is with the post I believe. The toolpath simulates fine and has no warnings.

I was able to get it to post. I deleted the toolpath and started a new rotary toolpath with all the SAME data and it worked. Even furthering my confusion.

The real kicker to me is that I'm using the circular style rotary pass so the C axis only goes from 0º to 360º and back. No need to rewind correct?

I duplicated the program and attempted to recreate the problem but it's not exactly predictable and is posting just fine now.

[seth.madore · Accepted solution]

 

[AllanVarcoe]

On a positive note, the gauge came out pretty bitchin'!

 

[daniean]

I'm currently having this same problem with the rewinds. The other day i posted a program that involved a 2D adaptive on the face of a part in the lathe, but i didn't get any errors on that program and the rewinds worked fine. 

What i cant wrap my head around is why does it even want to do rewinds on a cyclic axis? In my mind this should be unnecessary because its a spindle, so it doesn't care how many revolutions it does in one direction.

The machine in question is a (2 month old) Haas ST-30Y, using the latest post for that machine from the post library.

I've attached the fusion file i am having this problem with, aswell as the failed NC program post and the log file to go with it.

[Laurens-3DTechDraw]

I know in the posts there is a limit to the C-axis revolutions. At least the older machines probably still have this limit of 8280 degrees positive or negative.
I'm not sure for the lathes if already has been fixed. But in the past there also was a limit to the C-axis on the UMC's and it was just a software limit that could be fixed by Haas.

[daniean]

So i guess i could check if my machine has this limit and if it doesnt, i could make a change in the code below to define the axis as cyclic? Do you think this would work?

var cAxisMain = createAxis({coordinate:2, table:true, axis:[0, 0, 1], cyclic:false, range:[-8280, 8280], preference:0, reset:1});

[Laurens-3DTechDraw]

If your machine does not have that limit I would suggest changing it to this indeed:

    var cAxisMain = createAxis({coordinate:2, table:true, axis:[0, 0, 1], cyclic:true, preference:0});

[AllanRidesBikes · Accepted solution]

I was wondering why they chose +/-8280º when the spindle/C axis doesn't give s $#!t how many times it rotates. I was about to pull my hair out and decided to change it to +/-50000º in my post and ran my part. Worked great!

Then I had asked the tech support about it and they said to just delete the range from my post.  

So set cyclic to true and then delete "[range: -8280, 8280]"

Once I did that it all had been working great! I've been using this post for about a month now!