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.
1 Like
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.
1 Like
Thank you. I used adaptive clearing and it worked.
1 Like