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oval hole is not correct dimension

13 REPLIES 13
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Message 1 of 14
thierry924K4
302 Views, 13 Replies

oval hole is not correct dimension

Hi someone who can help me in need

 

I need to make this oval hole in this part, I have done this a thousand times, but now something is wrong, the overal diameter is correct 10.3mm but the width is to small, it should be 9.1mm but it come out 6.5mm, 

 

i tried it with a endmill of 4mm and with a mill of 6mm.

 

tried adjusting the feeds, nothing helped

 

please please please someone help me 😞 😞 

13 REPLIES 13
Message 2 of 14
seth.madore
in reply to: thierry924K4

Hmm, your code and toolpath look right, it's going to X-/+ 1.55mm. Add in the 6mm of your tool and we arrive at 9.1mm

I see you're doing this with XY motion alone. Have you tried using Polar?

 

When you touch off your tool in the X, how are you adjusting for tool radius?


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 3 of 14
thierry924K4
in reply to: seth.madore

Hi Seth

Indeed I tried and draw the outlines in autocad to see if the coordinates are correct and it is..

I already am using polar because I need to do this on the subspindle.
I post it as u primaire spindle job and then manually typ G14 to get the correct output on my subspindle, because fusion cannot post a milling job on the subspindle.
Message 4 of 14
seth.madore
in reply to: thierry924K4

Mmm, no. Polar is a series of X/C moves, but I was able to post out in X/Y. Were you seeing differnt?

 

At the end of the day, the code is correct, so the problem exists somewhere in your offsets or machine 😞


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 5 of 14
thierry924K4
in reply to: seth.madore

If I put the oval hole out of the centre, it does it correctly.. the post processor for the haas st20y needs a urgent update on milling on the subspindle
Message 6 of 14
seth.madore
in reply to: thierry924K4


@thierry924K4 wrote:
...the post processor for the haas st20y needs a urgent update on milling on the subspindle

With your file and using the Haas post, I get code that is correct. It doesn't work on your machine (on the sub spindle).

 

Are you colliding with anything that's out of your field of vision?


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 7 of 14
thierry924K4
in reply to: seth.madore

Hi seth

There is no way that you can post a complete job with main and subspindle milling actions on a lathe, the main spindle uses C axis and the subspindle uses x,Y value

+ if I post a milling job in fusion on the subspindle it always fails, with or without C axis...
There is no way around it, I have to post the milling job that needs to be done as a primaire spindle job and then I manually adjust the code (g14 instead of G15)
Remove C0, H0,M154

Where can I ask someone for this post adjuiment?
Message 8 of 14
seth.madore
in reply to: thierry924K4

Hmm. Take a look at this code and this video and help me figure out what I'm doing different and won't work for you:

 


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 9 of 14
thierry924K4
in reply to: seth.madore

Hi seth

 

thx! But my machine goes into a fault because it post go c0 and and the line below g182.

 

Why is it posting this

 

Message 10 of 14
seth.madore
in reply to: thierry924K4

Did you mean "G112"? (Not 182)

 

It needs the C0. to orient the spindle and define it's start point, no? Otherwise, how would it know where to start?

 

To clarify (for my understanding), you want to be seeing X/Y moves in the code, not X/C, correct?

 

 


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 11 of 14
thierry924K4
in reply to: seth.madore

Hi seth

The subspindle on a haas does not have a c axis, maybe with a m119 p0?

I would like it in x y code indeed.


Message 12 of 14
seth.madore
in reply to: thierry924K4

If you remove the G112 and C0 from the code that I shared;

A) Does it run and is it correct dimensions?

B) How does the spindle know where the part is in "C"? 

C) Is there a spindle brake that holds it in place?


Seth Madore
Customer Advocacy Manager - Manufacturing
Message 13 of 14
thierry924K4
in reply to: seth.madore

hi seth

 

i manually add a brake and M19 P0. command

 

it runs perfect but the dimension is still not ok, does it maybe have something to do with feedrate?

 

I am going crazy, such an easy part

Message 14 of 14
seth.madore
in reply to: thierry924K4

Yes, it's an easy part, but you're effectively asking your machine to do something it wasn't designed to do, right?

Can you confirm that you're not colliding with anything in the turret when you're machining this feature? 

 

It wouldn't hurt to reduce your feedrates and see if that solves it, but I'm skeptical of that being the cause..


Seth Madore
Customer Advocacy Manager - Manufacturing

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