I am trying to build the spoil board set up from Corbin Dunn ( https://www.youtube.com/watch?v=wUP99Vdxp3E) and I have the Fusion file loaded up, but the output it trying to send the bit out of bounds on the right (X+) axis.
There’s ample room available, the purple dots accurately represent the soft limits of the machine, and my spoilboard is pretty close to 0,0 (within) those limits as well.
As graphed, were it to cut the left side would not extend off the left edge, and the right would go more than a bit’s width off the board.
Assuming the X travel of this file doesn’t exceed the X travel of your machine than they points to the X offset being such that it’s pushing the job over in X+
Go to Set Part Zeros>WCS table and look at your XY offsets. From the looks of it they are more than zero. If they are, zero them out and see if it graphs.
Which part are you trying to cut? The slats? If I were to do it again I’d just do those on the table saw and rabbet them. If you don’t have a tablesaw, then the CNC is good (and more precise).
Make sure in the “Setup” I didn’t leave an offset there; I frequently use offsets and forget to reset them when I share the files. It should be G54 for most people.
Be sure to set your spoil board’s front/left side to be your 0,0 origin in G54.
Finally, if it is still going out of bounds you might have to change how the entry and exit works for the toolpath; you should be okay with a 49" piece of MDF on a “Four foot” avid table.
I had the same issue when I setup my spoilboard with Fusion.
My first problem was using a facing operation to surface, and I ended up switching to a pocket to get past it. The large surfacing bit would go out of bounds with the way the facing operation worked.
The second issue, and I think was the real cause, had to do with setting tool height and WCS. I’m still not totally sure where I screwed up (and I think I still screw this up, so maybe I still don’t totally get it). I think that when I set xyz0, I didn’t tell Centroid which bit I was using and that threw things off. I had told Centroid I was using a 2" bit, but I switched to a .25 to set xyz0.
I still often have to set xyz0 twice with the plate. Often the first time doesn’t do it right, and I’m certain it’s not a system fault, but something I’m misunderstanding.
Have you guys verified the gcode to see if the WCS is actually being set? Back when I was setting things up it was a checkbox that wasn’t checked by default in the post processor. I know I missed it.
Our default post processor for Fusion (on EX) does NOT output a G54 or G55 command for the WCS. This is on purpose so that you can set it to whatever you want in Centroid and when you run your G code it will be on that WCS.
You CAN have Fusion output a WCS if you want, there are options in the post processor setup you can turn on.
You might be overthinking this a little…
Basically it works like this:
Whenever you put in a new tool you press the MTC button. When you do that the tool is measured and that tool height is set. You don’t have to think about tool heights anymore, you can just go on to setting your XYZ zero with your plate, manually etc.
I’m pretty sure you nailed my problem. It took me a while to get used to that, and is probably why things work better now.
I still have an issue sometimes when setting xy using the plate. I’ll send the spindle xy0 and it’s off, then do it again and it’s perfect. I don’t think there’s a glitch with the system, but haven’t figured out what the issue is yet.
