HST Toolpaths not comping Tapered Ball Mill

[Mr. Wizzard]

I've working all morning trying to figure out why my hst toolpaths won't work right and i think i've got it.

I created my own tapered ball end mill to use for the part. It's a sphere-shaped cavity with draft and a couple small cone-shaped bosses inside.

Never really have issues with surfacing toolpaths, but it's been F'ing me all morning cause i can't figure out why the tool won't follow the surfaces.

I changed the tool to the same sized regular ballnose and now it works.

WTF?

Will Mastercam not comp a tapered ball end mill correctly or am i missing something?

Please help.....

thanks.

[Roger Peterson]

should be fine, as long as you didn't create an "undefined" tool. Create a tapered tool with a "full" corner radius.

[Mr. Wizzard]

It is an undefined tool, but it shows up correctly in backplot. It just doesn't seem to calculate the toolpath correctly. The ball doesn't cut the surfaces. It stays off everything like it's leaving stock.

[Mr. Wizzard]

This tool is a Harvey clearance cutter. It's a .078 diameter ballnose, .118 loc, then a reduced neck diameter to .195, then the 2 degree taper starts.

It's not a standard tapered cutter.

Does HST not support cutter compensation to the ball on custom tools?

[robgbritt@westpharma]

Make sure you have a value entered in the box for corner radius on the tool page for your undefined tool.

[Roger Peterson]

surface toolpaths will not compensate to an undefined tool. Create a "tapered" tool type with the correct angles, diameter, and corner radius and mastercam will compensate to the surfaces.

 

 

Regards,

[mchin-pilot]

Do as per rob g britt

Corner rad = half dia of cutter

[Roger Peterson]

doing as rob g britt, the surface toolpath will simply compensate to the diameter of specify with the corner radius you specify, essentially a bull nose or ball endmill.

 

 

Define it as a tapered endmill if you want the surface toolpath to compensate to the taper.

 

 

HTH

[Odell]

I have this same problem and I didn't before. It didn't show up until i went to MU3. All my custom ball mills do not generate right. On the other hand ,all of my tools that are flat or have a bull nose seem to work right. I cant figure it out ether.

[Mr. Wizzard]

quote:

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surface toolpaths will not compensate to an undefined tool.

---

Question, answered.

I can't use a "tapered" tool, because it can't be defined accurately for the tool i'm using. I need to use an undefined so the profile will come in, but i cannot get the path to come out right.

[Roger Peterson]

you can still define it as a tapered tool, then use a custom profile for backplot/verify so you can tell if the actual profile will cause any issues.

 

 

HTH

[gcode]

quote:

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I need to use an undefined so the profile will come in, but i cannot get the path to come out right

---

try this..

draw the tool to size

make it undefined

set the diameter at the intersection

of the tapered wall and a flat bottom.

Set the correct radius in the radius field

[Mr. Wizzard]

WTF? I tried the same HST path as yesterday with the same tool, same settings, and now it looks like it's working! I can't find anything different from what i did yesterday.

[Mr. Wizzard]

also, gcode, if i set the intersection of the taper and a flat bottom, I still get the same diameter of tool

Maybe i'm not understanding you fully...