Center Drill Definition is not quite complete

[Dead Money]

http://www.emastercam.com/cgi-bin/ultimate...t=000015#000000

 

Anything happening with this yet?

 

I am programming a part using a 60° centerdrill to drill off center holes in the side of a shaft. I would like to time in edge breaks using verify but the current tip of the tool is drilling the holes oversize.

[jeff]

It amazes me the little things that Mastercam doesn't address.

Especially since it's been around for so long.

[mayday]

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It amazes me the little things that Mastercam doesn't address

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not to mention the big ones.

[chopsley]

Applicon Bravo, the desendent of the old CompactII of the late 70's, let you pick any size centerdrill you wanted, tell it what dia. chamfer you were were looking for and bang, the Z depth was calculated for you. No problem unless some bozo had been grinding on the centerdrill. I loved that feature.

[Guest CNC Apps Guy 1]

WAY WAY WAY back in the day I had a C-Hook for this. I compiled it for V8. I never updated it.

Never felt the need as I never use Center Drills.

 

The C-Hook would let you select circles, then you selected your centerdrill (based on values stored in amn editable external file and it created points at the appropriate depths for the centerdrill selected.

 

I could ressurrect it... not for free because of what I'll have ot do to resurrect it. Install Visual Studio (latest release), configure, re-compile, etc... Probably looking at a day's work.

 

Let me know if there's any interest.

[Charlie Pierson]

Stock 60 deg c'drill formula, if anyone wants it:

 

Zdepth(inc)=(1.3*Pilot Dia)+.866(Chamfer OD-Pilot OD)

[chopsley]

Thanks Charlie. I used to have that formula when I was learning to program many years ago with pencil cam. Then with compactII and Applicon Bravo I did not need it anymore. Now in 2010 with MasterCam it will come in handy once again.

[Rob @ Target Machine]

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Stock 60 deg c'drill formula, if anyone wants it:

 

Zdepth(inc)=(1.3*Pilot Dia)+.866(Chamfer OD-Pilot OD)

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I've been using this for years.

 

Desired Diameter - Tip Diameter * .866 + Tip Length = Depth

[Programinator]

good one charlie.....Thanks

[Matthew Hajicek - Singularity]

I'd just like to be able to use standard center drills without having to draw them as a custom tool. I use double and triple aught center drills for spotting sometimes on small stuff, and I just want to see if the shoulders clear.

[chopsley]

I've heard that the MasterCam center drills you call from the library are not exactly correct. Therefore what you see on verify might not be what you will get on the part. I agree. Creating a standard centerdrill into a custom tool is a pain in the toe workaround. I feel your pain Matt.

[Guest CNC Apps Guy 1]

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Creating a standard centerdrill into a custom tool is a pain in the toe workaround.

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Which is why the C-Hook was created. Teh definition table was an editable table so you would take the dimensions from your Ctr. Drill Mfr. and you're off to the races. I just took the numbers from the Machinery's Handbook.

[mayday]

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Teh definition table was an editable table

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ahhh,

 

so the dog ate it huh?

[Guest CNC Apps Guy 1]

I said ediTAble, not edible .

[Matthew Hajicek - Singularity]

IMHO this is something that should be address by CNC, not an aftermarket add-on. Ima gonna send it in again.

[Charlie Pierson]

Mastercam Guru,

if you add in the length of a 118 deg tip point, our formulas are identical w/ the exeption of reading left->right or right->left.

[Rob @ Target Machine]

Yeah - You're right, but it's:

 

Zdepth(inc)=(1.3004*Pilot Dia)+.866(Chamfer OD-Pilot OD)

 

Jes messin wit ya. Lol

 

What's 4 tenths between friends anyways?

 

Actually, I like your formula better, as it's a little more straight-forward....No need to check tip length at the comparator.

[Guest CNC Apps Guy 1]

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IMHO this is something that should be address by CNC, not an aftermarket add-on. Ima gonna send it in again.

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Funny, same thing is said about MoldPlus, Verisurf, Prodrill, etc...

 

That's been a request since the dawn of time. Good luck with that.

[chopsley]

Bak at the dawn of time, ( I remember, I was there), Applicon Bravo and Compact II handled it very nicely. I'll admit MasterCam and other systems are way more powerfull than the old text based stuff but it would be a nice feature and it cannot be that hard to provide one would think. Bravo had some very nice lathe roughing routines as well. Say you were roughing a part that had a good number of step diameters on it. You described the stock and finish boundaries as usual and had the option to specify a range of depth of cuts. The system would then optimize the cutting within that range so you would not be taking say a .040" depth of cut for a span while most of your other depths were say .140" to .185" or so. I really liked that one.

 

Sorry to ramble but I used that system for quite a few years and am sometimes amazed the new systems don't have a lot of these user friendly features.