Finishing mistery

[Alphastar]

I am trying to figure out why shorter endmills are giving me MORE tool marks than longer ones. Anyone ever seen this? Cutting wax with very small bits, and just looking for any kind of theory that I could test with. Again, all factors the same, but shorter bits give worse finish.

Similar Threads:

• Doosan Puma 2100Y tapping mistery
• Need Help!- no plunge feed rate when Z level finishing and Advanced Z level finishing V27
• The Greatest Mistery of Chinese Lasers...
• Soba (Shoba) 4'' rotary table problem/mistery
• Finishing

[gabedrummin]

You holding all the tools the same way .You talking about the floor or wall finish ?

[awerby]

Maybe your longer bits are sharper.

[Alphastar]

You holding all the tools the same way .You talking about the floor or wall finish ?

Yep... Using an ATC. Tools from the same supplier, tried multiples of each, all brand new.

I am seeing it on the slopes and floors, not walls. A straight line in the floor looks like an open bracket. The direction the bracket faces looks to depend on the direction of cut. G40 is set, G41 not used.

[mactec54]

Yep... Using an ATC. Tools from the same supplier, tried multiples of each, all brand new.

I am seeing it on the slopes and floors, not walls. A straight line in the floor looks like an open bracket. The direction the bracket faces looks to depend on the direction of cut. G40 is set, G41 not used.

G40 and G41 G42 are not needed that is for cutter compensation, would have nothing to do with how the surface finish looks even if it was being used

G40 is cutter comp cancel
G41 is for cutter compensation left
G42 is for cutter compensation right

[Alphastar]

G40 and G41 G42 are not needed that is for cutter compensation, would have nothing to do with how the surface finish looks even if it was being used

G40 is cutter comp cancel
G41 is for cutter compensation left
G42 is for cutter compensation right

Right... I merely brought it up because I wanted to show that it was turned off. Because if not, you would get that exact problem.

Anyway, everything is opposite. Long tools are giving me less toolmarks. Toolmarks are perpendicular to cutting direction. For example, a horizontal pass is giving me vertical lines, and a 45 degree parallel pass is giving me lines at 135 degrees.

Nothing makes sense.

[Algirdas]

what if you increase / reduce the spindle rev ?

[dazp1976]

Tool Helix?.
A couple of my tools leave a horizontal line all around the side of a part when doing a contour finish pass.
Unexplaned. Tools looked fine

[mactec54]

Right... I merely brought it up because I wanted to show that it was turned off. Because if not, you would get that exact problem.

No Cutter Compensation would have nothing to do with finish on the part

Anyway, everything is opposite. Long tools are giving me less toolmarks. Toolmarks are perpendicular to cutting direction. For example, a horizontal pass is giving me vertical lines, and a 45 degree parallel pass is giving me lines at 135 degrees. Nothing makes sense.[/QUOTE]

Can you post so photos of the cuts