5 axis cicular interpolation

[PT1VZ1]

Hi, I was wondering if anyone knows anything about 5 axis cicular interpolation for a laser cutter. Our current post using 5 axis curve creates small increments instead of circular code for circles. Any help would be great. Thanks

 

Greg

[crazy^millman]

Well I guess the fisrt question would be does the machine support axis sub. This would be the only way I could think of to get masteram to output the code you are looking for since I am assuming the head moves and not the material and it would be a vertical set-up. Also are the whole planear or are they 3d ellipse to make circles whihc would not be a true circle.

 

Do you have the filters turned on to make arc in your toolpath operations?

[PT1VZ1]

What kind of axis subs would be needed? I think that the manual teach box that the machine also has uses sub routines for it's programs. As far as I know the holes are planear not 3d elipse. I use a plane to control tool axis control in the toolpath? And the circles are created nomally. What filters are you refering to? The post that were using was written for us.

[TonyNanni@BNB]

why do you care if it outputs small increments instead of circular code for circles???

[RandleXX]

Is the geometry used for the toolpath a spline?

[Travis_Buchanan]

If I am think correct, teh crazy millman isn't talking about subroutines but is talking about axis subsitution. A set of virtual axis must be created and processed by the control to do a circular interpolation 5-axis. But why would you want to do that? Is it memory problems?

[John Summers]

I doubt that the control supports circular in any plane except X,Y, but I could be wrong, since I haven't seen the manual. If it does support circular, the postprocessor writer would need to see the 'rules' in the manual. In a tilting rotary table, the plane of the off-axis circle is rotated into the X,Y plane, so the control can use normal X,Y circular.

[PT1VZ1]

The geometry used to create the toolpath are lines and arcs, rarely splines unless doing a blend around trimline or something. The reason for not wanting small increments is that the machine isn't able to process them fast enough to run at faster feedrates.

 

Greg

[PT1VZ1]

Machine is a mitsubishi 2015VZ laser with zero offset head

[Fig sign]

You can use filtering ...

[PT1VZ1]

Sorry what kind of filtering?? New at this.

[PT1VZ1]

Found Filtering.

[Fig sign]

When you filter a toolpath, Mastercam replaces toolpath moves that lie, within a specified tolerance, in a straight line with a single tool move. You can also optionally replace multiple linear tool moves with an arc move of a specified minimum and maximum radius.

 

The Filter settings dialog box lets you set parameters for toolpath optimization, which include:

 

¨ tolerance for replacing multiple linear tool moves with a single move.

 

¨ number of points Mastercam looks ahead when filtering a toolpath.

 

¨ one-way filtering to filter a toolpath in one direction, usually for a finish toolpath, to avoid small polygonal patterns on the finish that can happen with zigzag filtering.

 

¨ optional replacement of linear moves with arcs. The Create arc options limit which planes arcs can be created in.

 

For Mill operations, Filter may create arcs in the plane you choose: XY, XZ, or YZ planes. Choose an option appropriate for your post processor configuration to handle arcs (usually designated as G17, G18, and G19 in the NC code).

 

¨ minimum and maximum arc radius.

 

 

There are 2 filtering ways assosiative and nonassosiative

Assosiative is a best way ,but nonassosiative you can imply on any toolpath ,even if it has no filter button

 

Choose NC utils, Filter to filter any existing NCI file.

 

In this method, filtering is performed on the ASCII NCI file, which is created when the operation is post processed. Once posted, the operation is no longer associated to the geometry so the filtering has no effect on either operations listed in Operations Manager or on the toolpath operation itself.

[JG]

quote:

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5 axis curve

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PT1VZ1,

 

I was told you can't get arc output using curve 5ax (g code 11) because it is always segmented internally.

 

Jg

[Fig sign]

I am not sure .

Anyway ,5 axes filtering helps great and I use it