5 axis - b axis spins

[MIKO ELLO]

Hi,

 

I am machining a 5 axis curve part(basically its a pocket and the walls are angle inwards a couple degrees). I am driving my tool along the curve and it looks good on verify. I run it on the HAAS machine and the B axis looks like its moving around the cutter the b axis is moving 90+ degrees to machine the part.

 

1 - Is there a way to get the A and B axis to have minimum movement and just have the X and Y profile the pocket?

 

Thanks

[CJep]

If you're wanting to have the A&B rotate into position only, then you could use a custom toolplane and associate it with a 2d pocket toolpath.

[MIKO ELLO]

If you're wanting to have the A&B rotate into position only, then you could use a custom toolplane and associate it with a 2d pocket toolpath.

 

I would like to have A and B axis have minumim tilt and then let the X and Y make all the moves, right now the X and Y are really not making any travel movements and the B axis is spinning the part to meet the cutter path. Im not sure if I am explaining it correctly

[MIKO ELLO]

I could probably live with the b axis rotating but:

 

1- I add depth of cuts to my curve 5 axis and it seems to take different passes at different depths

 

2- the rotary is choppy when it cuts

 

I just cant figure out how to fix these

[MIKO ELLO]

does anyone have a good Hass 5 Axis post that utilizes the HRT210? Maybe my post is just not set up correctly - I am using the Generix 5x post. Sorry if I posted in wront area

[CJep]

You could use control lines for your tool axis control that will limit the movement.

[MIKO ELLO]

I am using X3

[K2csq7]

Yellow, Did you try Cjeps toolplane & 2D pocket suggestion?

That would give you the correct A & B rotations on the first line of the toolpath, then only X & Y moves for the actual cut.

[MIKO ELLO]

I will give it a try. I didn't understand because i dont know how to do it. I will tinker with it and see what happens. So basically i create a new plane from one of the walls and run a 2d pocket path? I guess i was confused because I needed the 5axis

[crazy^millman]

Well I guess it comes down to do you understand what 3+2 machining is. This is the practice of tilting the head to a desired position then taking cuts in that plane. Then you do work in that plane to use the efficient and rigid part of the machine to accomplish a lot of work quickly. the thing most people to do realize is that the machine will do everything a 3 axis machine will do just in a 5 axis set-up. I do not recommend true 5 axis work for roughing and for some finishing. The reason is the work can be most times done in a 3+2 or 4th axis movement without the need of 5 axis. So to make a plane the easiest way in Mastercam to get use to it is to use the C-plane = G-view in the C-plane selection area. The idea is move the view from where you are to a place you know the tool will reach what you are looking ot machine and also keep the Z X and Y in the correct position. Now make a 2d toolpath from here and back-plot. This will give you a good idea how things work. From there you will understand how to use the rotate planes and other things. The one I like the best is Dynamic planes. It now gives you a visual way to see what is going on. I did a WCS help thing some time ago. Search for topics I responded and and it might be a of some help.

 

HTH

[Colin Gilchrist]

You can do this with just the Curve 5 Axis toolpath. The feature you are looking for is called "Fanning", and Mastercam uses it to make sure the tool only rotates in the corners, and it makes most of the wall cuts into linear only moves. You need to set a Fan Distance, this tells Mastercam how close/far from the corner to start rotating. Try 100% of your endmill Diameter as a starting value for the fan distance. You will probably also want to turn on the Point Generator, set to Angle, with a setting of .1 degree.

[bot9million]

Colin, I might be blind but I don't see the fanning option in Curve 5 Axis. I do see it in Swarf 5 Axis however.

[MIKO ELLO]

I don't see the fanning option? is swarf the same as 5axis curve. Im using X3

[MIKO ELLO]

can i send this file to anyone so they can take a look? is there a way to upload

[MIKO ELLO]

I was able to figure it out using advanced mutli 5-axis swarf. I cant control how the b spins because we are using a trunnion. The trunnion doesn't tilt shown in verification so that is why the b axis is rotating to compensate

 

Thanks