Wall stock on angled wall

[Sigurd]

I have attached a file of an electrode that I'm working on. In the third operation, I go around the bosses with the cutter set to -.005" stock in order to get my .005"/side overburn. My question is about the angled surface that I'm finishing in the fourth operation. When I set a wall stock value like -.005" does Mastercam offset along a machine axis (Y in this case) or normal to the surface? That small flat from sharp corner to sharp corner measures .020 and I need it to be .010 on the carbon. 

RH 11659-60 electrode.mcam

[Leon82]

If you click the question mark it has an explanation. It averages between wall and floor if I recall.

[gcode]

I believe there is a video on the Mastercam You Tube Channel that covers this in great detail 

[Sigurd]

Thanks for the replies. Is that video called "Stock Aware Finish Machining"?

[Sigurd]

I watched "Stock Aware Finish Machining" on lunch. Not quite what I was looking for, but still very useful. Would you be willing to post the link to the video you're referring to?

[danatoem]

Okay so we cut alot of trodes here. When you use minus stock it will take it perpendicular to the plane your cutting. I would use flow line on that angled surface  (-.005) . The path your using curently dips below the surface than back up which makes it awkward to see on verify. So you should cut -.005 with your 2 d and with 3 d paths and it will take what you need for a "spherical orbit" You can always put it in a sideview and replay and see that its taking correct stock. Now if your using a different orbit on you sinker than  stock has to be handled different.. With spherical, and sharp corner on your trode will end up with a .005 radius  in the steel. 

[ajmer]

its here

 

[Sigurd]

55 minutes ago, danatoem said:

Okay so we cut alot of trodes here. When you use minus stock it will take it perpendicular to the plane your cutting. I would use flow line on that angled surface  (-.005) . The path your using curently dips below the surface than back up which makes it awkward to see on verify. So you should cut -.005 with your 2 d and with 3 d paths and it will take what you need for a "spherical orbit" You can always put it in a sideview and replay and see that its taking correct stock. Now if your using a different orbit on you sinker than  stock has to be handled different.. With spherical, and sharp corner on your trode will end up with a .005 radius  in the steel. 

Thanks. I tried flowline and it's leaving a cusp up at the very top. I do see that it takes the stock perpendicular to the surface. It appears that that ends up cutting too much stock away. I need that TSC between the top of the trode and the angle to move .005" in the Y axis.

 

We do circular orbiting in the XY axis for almost all of our jobs. So yes, a .005" radius is left in the corner and that's fine. 

 

I've got the waterline path running in the machine right now. I started at -.002 stock and now I've adjusted it to -.004. This is not a critical feature, but I'd like to be able to get it right. And, I'm self-teaching here at work.

[Sigurd]

40 minutes ago, ajmer said:

its here

 

Will watch it when I get a chance, thanks.

[danatoem]

So if you take .005 off the angled face than -.005 off of the top flat face that should put you  right on the money!  

[Sigurd]

On 11/11/2021 at 3:21 PM, danatoem said:

So if you take .005 off the angled face than -.005 off of the top flat face that should put you  right on the money!  

See, I don't want to touch the top flat face with the toolpath. I've already trued that up in the surface grinder. 

I did watch that video. Will likely have to watch it again. 

I think that I can say we never use spherical orbit here at work. It's always either XY for most "normal" core/cavity work or YZ for a slide face.