What is a good step-over rate cutting this clock with a 1/16" tapered ball nose bit? Last time I got lines real badly. My 1/8" bit actually did a much better job so I must have got something off and step-over is the only thing I think I'm missing.
Oh, and about how long is your finish pass taking to complete? With my 1/8 it took about 3 hours, I just recalculated and it's 10hrs!
I don't always keep track of actual machining time, but in this case, I did.
Vectric_Mantle_Clock_ARCHES: 9 min.
Vectric_Mantle_Clock_FRONT: 5 hrs. 32 min.
Vectric_Mantle_Clock_PANELS: 20 min.
The files I created for the project already have the stepover percentages set just as I used for creating the sample. So, you'll see the front panel carving has a 39% stepover for the Roughing Toolpath (using a Down-Cut 0.25" EM @ 2 inches per second Feed Rate and 1 inch per second Plunge Rate) and 8% stepover for the Finish Pass (using a 0.0625" Tapered BN @ 3 inches per second Feed Rate and 2 inches per second Plunge Rate).
I prefer a 6% stepover for Finish Toolpaths, but often compromise and use 8% to save time. I find anything over 8% leaves more undesirable visible lines than lower settings and requires a little more sanding. The choice is...spend more time carving at the start or spend more time sanding at the end.
The Scale Factor I set for the project was 1.8, which yielded a reasonably close time estimate for the ARCHES and PANELS files. However, that Scale Factor was too low for the FRONT file. A more accurate Scale Factor time estimate for that particular file would have been 2.5 (time estimate 5:33 compared to the actual time of 5:32). My Rapid Rate setting is 100 inches per second.
I do not know how you are reaching a 10 hour estimate unless your Scale Factor and/or Rapid Rate is very far off, or the bit settings are incorrect. Double check those and see if you need to adjust accordingly. The settings in the original files are a good start, but you can tweak if necessary for your own machine and material.
I hope this is helpful.