Trying to run first metal part on new mill conversion

Hi All,

I have a Sieg X3 mill with a Mesa 5i25+7i76 running LinuxCNC. I created a part in Fusion 360 and did the cam in there too. I'm not sure where I should be asking this question CNCZone, Fusion360 forum, or here so I'll start here. This is a simple drilling operation. When I run the part, the X & Y look OK but the Z does not go deep enough. It should be a hole through 1/8 inch aluminum but is only goes about have way through. In the Fusion simulation the bit goes well through the part. I tried some commands on the MDI tab and the Z moves 1 inch when commanded to do so. I tried jogging to make sure I wasn't hitting a soft limit. Each time I run the program it get just the slightest chip when the drill touches the bottom of the hole. I just don't know what else to check.

Thanks
John

Reading G Code is still a lot like reading Spanish for me. I'll go through it today since I am off.

JT, are you on the Spyder Lovers forum? You look familiar.

Here is the code

Could it be this line? N65 G43 Z21.35 H2 How would Fusion know the length of my tool when I don't even know that until I touch it off? I using R8 collets and a drill chuck to drill bits. I'm going to try changing it by 5mm and see what happens.

I'm still trying to understand how to perform manual tool changes with R8 collets. Eventually I going to get tool holders so I can set the tool lengths and put them in the tool table.

%
(ZSWITCHPLATE)
(T2 D=5. CR=0. TAPER=118DEG - ZMIN=-3.502 - DRILL)
(T3 D=1.6 CR=0. TAPER=118DEG - ZMIN=-2.481 - DRILL)
N10 G90 G94 G17 G91.1
N15 G21
N20 G53 G0 Z0.
(DRILL1)
N25 M9
N30 T2 M6
N35 T3
N40 S2000 M3
N45 G54
N50 M9
N60 G0 X5. Y6.
N65 G43 Z21.35 H2
N75 G0 Z11.35
N80 G98 G81 X5. Y6. Z-3.502 R11.35 F728.
N85 X80.
N90 G80
N95 G0 Z21.35
N105 M5
N110 G53 Z0.
(DRILL2)
N115 M9
N120 M1
N125 T3 M6
N130 T2
N135 S2000 M3
N140 G54
N145 M9
N155 G0 X14.696 Y9.9
N160 G43 Z21.35 H3
N170 G0 Z11.35
N175 G83 X14.696 Y9.9 Z-2.481 R11.35 Q0.4 F400.
N180 X24.196
N185 X37.699
N190 X47.199
N195 X60.473
N200 X69.973
N205 G80
N210 G0 Z21.35
N220 M9
N225 G53 Z0.
N230 M30
%

If you have a R8 spindle, look for the tormach tooling. That works well with smaller machines. I prefer their older style holders that are not designed for the tool changer if you can find them as they are a bit shorter.

T2 M6 followed by T3 does not look correct to me. Not sure why the post would call out 2 tools.

OT-CNC I do have R8 and I'm definitely getting some tool holders.

I did figure out what was wrong. In fusion the origin of the part was the bottom face of the part rather than the top. Since I was drilling a hold in 1/8 inch material when I touched off the part it thought that the tool was on the bottom face. Then when it went to drill it was drilling into the material by the amount of break through depth I had. I just made my first successful milling operation. The first attempt broke a 1/4 end mill because the default feed was too aggressive.

As far as the code calling out two tools I that was because the part had two different size holes in it. I was expecting to get prompted for the tool change and be able to touch off the second tool but it doesn't seem that how it works. For now I will stick with one tool per file until I either get tool holders and can populate the tool table or learn how to do what I thought I would be able to do if it can be done at all.

Much more learning to do.

Thanks
John