Roughing pass was done with a .38 bit and seemed to go ok.
finishing was done with a 1/8 ball nose. about 1/2 way through I see that the roughing carve took way too much material out of some areas, leaving the 1/8 finishing carve hitting nothing.
Ill attempt to link the project Keep in mind I modified the project now to reflect a 1/4 inch bit for the roughing, but I am afraid to re do this as I have no reason to believe it won’t screw up again. (yup, its a large carve too)
ill also include a picture of the area it took too much off from.
the red circled area is what was cut too much.
its odd. its not like a belt slip as I would see the rest of the carve be off.
I used a z probe for depth and the machine did not bottom out during the carve.
@ChrisStrahan1
Too bad your roughing pass is gone now, first thing that comes to mind is spoilboard or workpiece mounting not coplaner with the X & Y axis, which a close inspection of the roughing would have revealed. Just for fun use the read out on your Z axis to check your spoil board.
I thought of that as well. I had recently cut some plexi with measurements of .001 of an inch and had no issues so I would have to assume its good.?
also, I have done several 3d carves before with zero issues…
it leads me to believe the file could be the culprit? I am trying to remember if I had to shrink the file down (meaning it was over the size limit)
IDK… just really struggling trying to figure this one out.
I appreciate the reply!
@ChrisStrahan1 .
The other thought that comes to mind is perhaps a bit of twist in the workpiece, or a fold in the tape if you were glueing, or even a bit of debris trapped under the workpiece.
My newbie mistake was using threaded inserts in my spoilboard so it is easy to use a bolt that is a little long which lifts the spoilboard.
It may be as simple as your finishing pass bit being a little too high. I’m not sure how you zeroed everything. It might be possible to re-run your finishing pass after lowering your finishing bit a small amount.
Keep in mind I modified the project now to reflect a 1/4 inch bit for the roughing, but I am afraid to re do this as I have no reason to believe it won’t screw up again. (yup, its a large carve too)