I have a bizarre issue. I am designing cabinet sides that include slots for domino tenons in fusion 360 to be processed on a onefinity elite MASSO G3. To do this, i am using slots, specifically for the 8mm cutter. The machine is calibrated because if I draw a 20mm x 20mm square it is cut perfectly to size. However, the slots are cut to a width of 6.5mm when in the vertical orientation and 7.5mm when in the horizontal orientation. Both are wrong but it is puzzling that this is also different in V vs. H. I am using a 1/8” cutter. So far. the only workaround I have found is to draw different V and H slots with the wrong size that will cut to the right size.
I am attaching the link to the fusion design and the G code file that is generated.
It would be great if somone had a hint as to why this is happening as it is driving me insane….
Thanks!
I looked at your files but could not open the toolpath to look at your settings.
I use Fusion, and one thing I often forget is that it adds stock to leave by default on some toolpaths.
The simulation shows you boring to full depth/15mm and then making the slot in a few full depth passes. This may lead to deflection which could be a factor in what you are seeing. Are the slot walls perpendicular to the stock top/pocket bottom?
I mill mostly aluminum and hardwoods and use multiple step-downs and always a finish/spring pass to reduce any influence from deflection.
Those are my initial thoughts.
Slotting in Fusion 360 is usually used when you have the exact size end mill loaded, so, if you used an 8mm bit, and ran a slot, the slot would be 8mm. Using a smaller bit, you’d want to create a rectangle and use an inside contour path with ramping.
Thank you. I used adaptive clearing and it worked.