topic Re: Configure 4 axis head to cut Pocket2d with 45deg Tool Orientation in HSM Post Processor Forum

Configure 4 axis head to cut Pocket2d with 45deg Tool Orientation

markER7TS — Tue, 28 Jan 2020 19:17:00 GMT

We have an older Biesse Rover with a C-Axis, equipped with a fixed inclinable aggregate set to 45 degrees. In Inventor, we've drawn a 3/4" thick panel and put a 3/4" chamfer along the edge at X=0 using the Pocket2D strategy, and to achieve this, we've set the Tool Orientation. This works nicely, and in simulation the tool is at the correct angle. Everything looks great.

Where I am stuck in the post is that I am getting incorrect results for my X and Z in the onLinear() entry function. It appears that the Inventor Tool Orientation is implemented in the post by tilting the workPlane, which equals [[0.7071, 0, -0.7071], [0, 1, 0], [0.7071, 0, 0.7071]], and that makes sense, because I have tilted the tool in X and Z, but in onLinear(), for instance, Z goes to zero and stays there. But I need Z to increase as X increases to affect my 45 degree slope.

I feel like I need to transform the points in onLinear() in the inverse direction of the tilt of the workPlane, and so I have tried this (and many other things) ...

function onLinear(x, y, z, feed) {

// simplified

// get the work plane
var w = currentSection.workPlane;

// get workplane inverse and multiply by my point
var v = w.getTransposed().multiply(new Vector(x, y, z));

// resulting vector does not yield the points I need

writeBlock('testing', v);

}

... but I am well and truly stumped. If anyone can offer some insight into how to approach this problem, it would be greatly appreciated.

Thanks,
Mark

Re: Configure 4 axis head to cut Pocket2d with 45deg Tool Orientation

markER7TS — Wed, 29 Jan 2020 01:00:41 GMT

I solved this in onSection() using ...

var w = currentSection.workPlane;
setRotation(w);

And in case it helps someone else, for the Biesse you can express C, AR, and AZ like...

forceABC();
var v = w.getTurnAndTilt(Z, X);
writeBlock('G0', cOutput.format(v.z), arOutput.format(v.z), azOutput.format(v.x));

Mark

Re: Configure 4 axis head to cut Pocket2d with 45deg Tool Orientation

bob.schultz — Fri, 31 Jan 2020 23:41:12 GMT

Hello Mark,

I am curious, what post are you using for your Biesse?

Thanks

Re: Configure 4 axis head to cut Pocket2d with 45deg Tool Orientation

markER7TS — Sat, 01 Feb 2020 02:21:08 GMT

Hi Bob,
Thanks for your interest. I've written a post pretty much from scratch. We have a couple of older machines, both Biesse NC 1000, and we couldn't find anything 'off the shelf.' I just keep adding capabilities as the need arises.

All the best,

Mark