Thank you for Dave Thompson

[Bruce Caulley]

quote:

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This was possibly the hardest post I've ever written. Going from a fix 90deg along an othagonal axis to a generic rot and tilt is insane. I used MP functions like dot and cross products that I've never had reason to use in over 10 years.

 

Regards,

 

Dave

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Job done

 

Bruce

[Greg Williams]

quote:

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I used MP functions like dot and cross products that I've never had reason to use in over 10 years.

---

Dot and Cross products?

 

Dave do tell what are these?

[Bruce Caulley]

I think they are mathematical functions similar to those used for matrix multiplication. Just a guess since it has been years since I studied higher maths.

 

Bruce

[Clay Walnum from CNC Software]

Yes, they're formulas used in 3D graphics programming. I'd be more specific, but it's been a long time since I've used them. :-)

 

--Clay

[Roger Peterson]

These are vector math functions that I didn't do so well on. Dot products basically give you the midpoint between two vectors. Cross products are a bit tougher to explain, with two vectors defined the cross product will give you coordinates for a third vector that is perpendicular to the plane of the first two vectors (I think??). Someone else can give a much better explanation than I.

 

One other thing, congradulations to Dave to actually be able to apply them in a real world situation!!!!

[John Summers]

I put a little 'manual' on the vector math found in MP.DLL on the FTP site. It's called VLIB.MPK. Use MUNPACK to unpack it. It's in POSTS... or will be soon. There are both 2d and 3d functions -- choose carefully.

[John Summers]

The name of the folder is Text_&_post_files_&_misc

[Guest CNC Apps Guy 1]

Hey John,

 

Some of us only have V9-X installed. MUNPACK is no longer available. Is it possible to get it in *.ZIP or *.RAR format? Please

[crazy^millman]

Just put in a directory you want it to go. V9 will put the file in what folder you have without any problem by doulbe clicking on the file. They are called .vec files and can read by any text editor. I like Cimco but any will work just fine for viewing the files.

 

Thanks for sharing that is very instrering stuff I like see old school math reminds of my Calculus days.

 

Is there anyway to get a copy of the VLIB.PST they talk about?????

 

HTH

[Roger Peterson]

V9 still has the unpack utility, just right click on the mpk file and hit munpack.

[Guest CNC Apps Guy 1]

Not in my V9.

[Guest CNC Apps Guy 1]

Nevermind, I just double clicked on the file and Mastercam took care of the rest. It must be imbedded in the Mastercam exe or somewhere else invisible to the untrained eye.

[Allan Brown]

Originally I thought we'd mount a 90deg head along X+, X-, Y+, or Y-.

 

Bruce decided to slap a theoretical manual rotary/tilt angled head on a tilt/tilt 5-Axis machine. The vector math stuff was used to analyze the angles between the final 'as-mounted' aggregate position, and the desired tool vector to set the machine rotary angles. It's been far too long since I've dealt with that stuff, so it gave me a brain owey.

 

MP really is kickass. Thanks CNC.

 

I'm either drinking a case of Fosters or a case of Peter Lehmann Shiraz this weekend to get this one out of my head. Whatever it takes...

[?Mark]

Hey Dave, don't be too modest and go for the best stuff, looks like you well deserved it...

[Allan Brown]

I was trying to name-drop Aussie drinks!

[Bruce Caulley]

Dave,

One word of warning. In order to raise GDP we export our treated effluent. It comes in blue cans with an F on the label.

 

 

Bruce