Add Multi-Axis Machining Ideas here

COE Administrator

Add Multi-Axis Machining Ideas here
Add Multi-Axis Machining Ideas here

Bryan Carpio Felsher

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
All I really need is the ability to swap any drive, check, or part surface, and retain the original order including all the local modifications. It can be done easily in other systems such as NCL or any language system. Surely, it can't be that difficult in Catia.

Maybe even to have a Multi-axis features? Like offset zones, Geometrical zones, and rework areas? I personally don't care about this much...but I know some people want to be able to do multi-axis pockets.

Most important to me is the ability to swap a drive surface. I often do parts with 30 or more drive surfaces, and screwing up and forgetting one in the middle is a nightmare. Currently, sometimes I'll pick a few- replay, pick a few change the stop- replay, pick a few change the stop- replay, pick a few change the stop- replay,etc...just to make sure I don't end up missing something. Really a pretty big waste of time on big parts.

COE Administrator

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
I'd like to second what BFELSHER said about adding drive surfaces to a Multi-Axis Flank Contouring toolpath if you missed one out. There's a few forehead size dents in my desk as a result of this.

Also, I would like to somehow do a 'local modification' to a Multi-Axis Curve Machining toolpath. Part of my work is programming trimming toolpaths for plastic and composite parts which are held / sucked down onto a fixture.

I use the Multi-Axis Curve Machining toolpath with lead and tilt for the tool axis, keeping the tool normal to the part / fixture. Occasionally this can cause the machine head or tool holder to clash with the part or fixture on certain parts of the profile. At the moment I am changing to interpolation for the tool axis, so I can change the angle of the head at the part that needs to change, but this means the whole toolpath needs interpolating.

If I could just choose lead and tilt, then add a interpolation arrow or two at the offending area, which over rules the lead and tilt. Life would be good.

I'm not sure if this is workable, or there may be a another way I haven't found?

Cheers.

COE Administrator

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
In R19, what was shown to us a COE Orlando, is that you will be able to:

1. Pick multiple pockets, in a Multiaxis flank MO
2. The order of picks is not important anymore

3. I did not see local mods, but it is a good topic for the whats in R19 Webinar, that Mr. Tourorn told me he wants to show all COE users.

This may be their solution to the swap a drive surface issue


"retain the original order including all the local modifications."
I agree with this. Hopefully it will be there.

Good ideas Simon.
Have you tried creating geometry, in a dummy curve machining operation, that deactivate the dummy curve machining operation, and drive those curves you just created?

We do that sometimes, to get the tlaxis we want with the "Catia we have today"


Dave

Samarinder Singh

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
Simon,
Did you try using Thru Guide tlaxis option? I use that for trim lines and works really good for me. But then again I dont see what you have for your part geometry.

I would like to see MAF with options that you find inside unigraphics' sequential milling.
Where you can insert a surface in between or replace the surface or can cut one surface in more than one pass before going to next surface. It is the toolpath when nothing works in cam system and you dont want to write apt program.

Billy A. Pricer, Jr.

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
Dave,

Just a quick wish to add to the list.

"Interpolation" Tool Axis Option under Multi-Axis Contour Driven function would be nice.

COE Administrator

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
Thanks for the tip about using a guide curve for the tool axis, but I don't see how this can help me?

In this sample, keeping the tool axis 'normal' is perfect all the way, around apart from the 1 near vertical face arrowed. Here the tool and holder would lie horizontal 'ish' and hit the part / fixture as it gets low down.

So I just need to tweak this one section to give it a bit of a lean away from the fixture as it moves down.


Cheers.

Bryan Carpio Felsher

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
With a part like that, I don't think a guide-curve would work.

But with parts with less angle variances, creating an offset guide curve on a sketch plane above the part surface works okay. Better for parts shaped like a bowl- either concave or convex. I use tool-axis thru a point more often for those kinds of parts.

For this part, I would use interpolation right off the bat if I didn't have a knucklehead with tool long enough to clear part and just go normal to a surface. For me, selecting interpolation and setting a few axes is better than having to create tons of special surfaces to drive the tool with lead and tilt or normal.

By the way, YES we need to be able to set local modifications as default whatever we choose.

Anyone (like me) ever had to program a part with 100 pockets- all multi axis, but walls only angled on one axis, so have to individually change each surface to TANTO and constrained to a 4-axis plane so the job can run on a horizontal four axis or on a 5 axis (customer request)? This took forever!!! if only I could have just set TANTO and 4-axis plane as default!!! (TANTO is not the same as TANTO FAN)

Billy A. Pricer, Jr.

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
This seems to be the place to add Multi-Axis Flank Contouring enhancement wishes. I was using it heavily last week, and began editing stopping conditions, etc. But I ran into an error that I remember from my NCL days long ago. "Forward Sense Reversed". That is an error that I am sure is coming from the NCL module, but in NCL, you could fix that error by adding an INDIRV (In Direction of Vector) in the line above. I always felt that the error should say "Forward Sense Lost", because that's what has happened. The software doesn't know in what reference Forward, Right or Left are anymore. By saying INDIRV/1,0,0, you are saying that the general Forward direction for the next operation is X+, within a 180 span, didn't have to be an exact direction, just a general direction, and 99 percent of the time, the "Forward Sense Reversed" error would go away.

I would like to see the ability to add and INDIRV on the drive surface which is failing, same as you can edit the stopping condition and such. I think it would help get through some complex drive surfaces.

COE Administrator

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
Interesting...

Can you post a pic of the area, with ds 1-thru whatever shown?
I am curious

Dave

Bryan Carpio Felsher

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
I too agree with Billy about INDIRV. I am really foreseeing a nightmare in R19 regarding Multax multiple pockets...I hope to God they keep the working version of it as well, because there are sure to be bugs...

I get the forward direction reversed error sometimes, too. Usually on a joggle fillet smaller than the tool rad. In that case, I break up the paths if grabbing a ref point doesn't help- though it usually does.

I honestly don't want to do multiple pockets, and I want the order of drives surfaces to matter...I think we're losing control and going to have a nightmare if we change it too much from the original NCL path that works great. I just wanted to be able to swap any surface and retain the original order as well as local mods just like in APT or NCL.

Hmmmm...I heard that R9992235028467 of V56920305683 is going to be bug free!!!! But that's just a rumour...and I don't believe it!

Billy A. Pricer, Jr.

RE: Add Multi-Axis Machining Ideas here
(in response to COE Administrator)
Interesting...

Can you post a pic of the area, with ds 1-thru whatever shown?
I am curious

Dave


Give me some time, that was two parts ago. I need to load a Demo copy of snagit to grab all the windows and show you the error.

Billy