Fusion 360 toolpath isn's exporting correctly to Shopbot

[cryptoconsultants1]

I am new to fusion 360 and have designed my first project that I want to cut on the Shopbot for the first time. I got 3 toolpaths set up to accomplish the various cuts I need in the correct order. I exported the shopbot file to the shopbot program and I get an error that the x axis or y axis is beyond software table limits. After getting someone at the makerspace, it's a shared shopbot, to look over my gcode he didn't catch anything other than the x axis was slightly greater than 48. He told me to try running it. I accepted the warning and my first cut was in the wrong location so I stopped the process. When I went to move it back to 0,0,0 the machine jumped over the stop and came off the track. I need help. The 0,0,0 seems to be set correctly in fusion and the machine was 0'd in the right spot but my cuts aren't right and the warning is showing something else wrong. I attached the fusion file. My test cuts you will see in the same setup file didn't give a warning and seemed to cut at the correct locations.

[johnswetz1982]

This is most likely where you have set your work offset on the machine.

[Joshua.Aigen]

Hi @cryptoconsultants1 , I looked over the file and that looks good, as long as your machine is the same as mine with the X axis is the long axis. It sounds to me like Shopbot changed the origin on you. You could not have set it up off of the table as it would not let you, but I've know Shopbots to do quirky things like this. Fusion 360 can't be blamed because nothing in the code sets the origin (though I'm not a post processor expert) you do that on the machine. Would you be able to run it again? I'd reset everything and look for the error message. Even turn the machine off and back on as that has solved many Shopbot problem I have encountered. Feel free to keep this thread going or reach out on email so we can see this though.

[cryptoconsultants1]

I got the error message on two different days. The first time I didn't run
the program and asked for help at the makerspace. The second day I still
got the error. Hopefully someone at the makerspace can get that end of
things sorted with me. I might just have to cut things up the old fashion
way with my tablesaw and a router.

[FrodoLoggins]

I'm not familiar with ShopBot but on my Xcarve the X and Y axes are switched compared to most CNC mills. In most machines the orientation of the X axis is left to right, Y axis is front to back like so (same as you):

But for my X Carve, X is front to back, Y is left to right. For my X Carve the work offset needs to be oriented like so:

Also try test runs with slower feeds/rapids so you have time to stop it if it's getting close to hitting the stop and running off the rails.

[Joshua.Aigen]

I output my own NC and looking at the preview in the SBC3 software the parts look correct. With the fact that it jumped the rails when moving to the origin really tells that the problem is in the machine itself. If you can use the manual move/jog to set the origin, you would need to switch the controller out of the "Shopbot_easy" mode.

 

[Joshua.Aigen]

I found a short video on how to set-up the origin on the Shopbot, I hope this helps and is the same procedure you are going though before you start cutting. https://www.youtube.com/watch?v=E1yEbLwUmtg

[cryptoconsultants1]

That is the exact process I used to 0 the axis before I started. Thanks for
trying to help though.

Someone at the makerspace said the machine has two xyz datems , one for
cutting, and one for virtual limits, if people move the gantry or bottom or
z it will move the virtual limits out of bounds. I'm not sure how to check
the virtual limits and think maybe that's involved with my issue.

[cryptoconsultants1]

So I got the machine fixed and calibrated. When I go to run a preview it is showing that the scale way off. Have any idea why the scale would be off when the file is sent to the shopbot? I'm cutting on a 4x8 sheet of MDF but the cuts are showing off the table. 

[FrodoLoggins]

You're programming/posting in inch mode:

If the machine is running in metric but you're programming in imperial, I would assume the preview would show your work much smaller, but worth to verify both are running with the same units.

[cryptoconsultants1]

Both are imperial but thanks for trying. That would definitely cause a
discrepancy.

I'm told the shopbot software is very old and not an up to date version,
could that cause a problem?