Strange Entry behavior of Engrave

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Strange Entry behavior of Engrave

Postby dgolber » Fri Jun 02, 2017 7:05 am

RhinoCAM 2012, Product Version 3.0.0.48

Strange entry behavior for Engrave.

Here are three curves: The bottom one is a circle at Z=0. The top right curve is irregular, with varying Z. The top left curve is the same as the top right curve, except projected onto Z=0.

In all cases, cut depth is 10mm, with steps of 2mm.
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In the first picture (order 1.jpg), the top right curve is chosen first, then the top left curve, then the circle. In this case:

At the first curve the first entry is as described by the Entry choice, in Parameters, and is tangent to the curve. All later entries are simply vertical.

At the second curve, all entries are as described by the Entry choice, in Parameters, and are tangent to the curve.

At the circle, all entries are as described by the Entry choice, in Parameters, and are perpendicular to the circle.
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In the second picture (order 2.jpg), the top left curve is chosen first, then the top right curve, then the circle. In this case:

At the first curve all entries as described by the Entry choice, in Parameters, and are tangent to the curve.

At the second curve, no entries are as described by the Entry choice, in Parameters. All entries are simply vertical

At the circle, all entries are as described by the Entry choice, in Parameters, and are perpendicular to the circle.

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Sorry about the missing pictures. Maybe you can sketch them for yourself.
It used to be easy to upload a picture to this forum. Not any more.
After an hour or so preparing this example, I'm not willing to spend more hours putting these pictures on a web site, figuring out how to use BBC code to point to them, etc.

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Any comment from MecSoft?
dgolber
 
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Joined: Wed Mar 26, 2014 7:22 pm

Re: Strange Entry behavior of Engrave

Postby MecSoft Support » Fri Jun 02, 2017 10:12 am

Please send the Rhino file to support@mecsoft.com and we will check in 2012 to see if there is a simple solution for what you are having difficulty with. If it is a software issue, we will check it in the 2017 release and let you know if this is still a problem or not.
MecSoft Support
 
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Re: Strange Entry behavior of Engrave

Postby dgolber » Tue Jun 06, 2017 11:00 am

For an even stranger example:

Draw a circle with radius 50. Draw an ellipse with both semi-axes 50. (Geometrically the two curves are the same. Inside Rhino, they are very different.)

Do Engrave on both. The entrance to the circle is perpendicular to the path. The entrance to the ellipse is parallel to the path.

Someone at MecSoft said "It's functioning the way it was designed." Yeah, sure. But it's not functioning the way it is documented; there's nothing in the Help file about this. If the guy who designed it refuses to tell us what it does in the documentation, he should include his 24/7 telephone number so we can call him up from around the world and ask him. And if it is so complicated that he can't describe what it does, change the code.

What is a bug? It's when the code doesn't do what it is supposed to do. And what is it supposed to do? Answer: It is supposed to do what the documentation says it does. Not what is hidden inside the head of the designer.
dgolber
 
Posts: 34
Joined: Wed Mar 26, 2014 7:22 pm


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