CNC machines make me horny...

[Harley]

Originally Posted by C*H*U*D

Helmets are cool.......but I think this is a more interesting subject:

http://www.youtube.com/watch?v=pMlGA...eature=related

Most painful pearl necklace ever?

[tom@vp]

Originally Posted by eron

how many lines of code you think that was? 10,000?

way way more than 10,000 lines

laser scanning to create geometry and programming the machine are two completely different things, hence where the term cad/cam comes from.

That was not done with scanned geometry, it was done original an solid, laser scanned geometry is very innacurate. that geometry was perfect.

the software that did that was likley automotive grade sowtware and half the cost of the machine. i would guess something like http://www.tebis.com $125k for begginer seat

[tom@vp]

Originally Posted by Eritex Inc.

Totally agree on the lines of code. I do some 3d contoured parts for a customer. One part is cut from a block of aluminum measuring 3" x 6" x 2" and I cut 2 at a time on a 3 axis machine. To cut those 2 parts is 1,098,000 lines of code.

did you do any linear filtering ? convert line to arcs ? million line program on a vertical is extreem

[Eritex Inc.]

Originally Posted by tom@vp

did you do any linear filtering ? convert line to arcs ? million line program on a vertical is extreem

Very intricate parts with lots-o-arcs using small tooling.

[tom@vp]

Originally Posted by Eritex Inc.

Very intricate parts with lots-o-arcs using small tooling.

i understand, ive been programming 3d for 20 years..

even mastercam will create programs with tiny inefficent line segments, it does not convert them to arcs automatically, most people dont know the difference, but you can filter the line segments out, using a chordal deviation tolerance and you part runs smoother and faster, with much less code.


and while we are at it, your finish on delrin has very little to do with the coolant you run, you can piss on delrin and get a good finish if you use the right tooling.

[Mayhem Eng.]

Unigraphics $100,000. a seat and we had 5 seats. If I remember, maintenance was like $100,000. a year. We also had Gibbs, mastercam and we had this other software called Inpact. Inpact was like $1500.00 a seat and was the most fun and easiest to use. I think they went out of business. Now I use Surfcam. There is a few things I would like to change but for the most part it works just fine.

Cut delrin dry except for tapping.

[Rig Rocker]

That video was amazing!

[tom@vp]

Originally Posted by Mayhem Eng.

Unigraphics

another real good one, where did you work before ?

i think the only thing i cut dry is roughing steel.

and phenolic or something like that

[Mayhem Eng.]

What I have found cutting it dry is the chip is lite and fluffy and doesn't stick to the cutting tool as much. You can really see this in drilling. When I used coolant during drilling cycles the chip would wrap around the tool and become hard from being cooled and stick to the drill. With milling the finish looks good better then when using coolant. Just my .02

[tom@vp]

anyways the key is not dry or wet, it is the tool..

what exact type of tool should be used for delrin or most plastic,,

[Duuuuuuuude]

Originally Posted by tom@vp

anyways the key is not dry or wet, it is the tool..

oh that could so easily be taked out of context...

Originally Posted by tom@vp

what exact type of tool should be used for delrin or most plastic,,

Here's what I use. Not the most precise, but it gets the job done in a hurry.

[tom@vp]

your thumb ... hehe

Originally Posted by Duuuuuuuude

oh that could so easily be taked out of context...



Here's what I use. Not the most precise, but it gets the job done in a hurry.

[Eritex Inc.]

I know this thread has deviated from its origin, but I want to speak to a couple points.

Tom, I do use the filters to minimize line segments. I am looking for some pictures of the parts in question and I think they will explain the huge amount of code needed to run them.

Originally Posted by tom@vp

and while we are at it, your finish on delrin has very little to do with the coolant you run, you can piss on delrin and get a good finish if you use the right tooling.

Not sure where this came from but....alright

[Duuuuuuuude]

Originally Posted by tom@vp

your thumb ... hehe

Actually, I meant the 'roid fueled 2x4.

[dkf]

I'm just glad the CNC control manufacturers are actually starting to put some memory on their controls so you can get away from drip feeding. Paying $4k for 4mb of memory really sucks.

Arcs ad tons of code especially during the finishing operation with a very small stepover. You can only make the minimum arc lenth so large depending on the geometry being cut.

[Cave Dave]

Originally Posted by tom@vp

million line program on a vertical is extreem

I do it on our Kitamura all the time.It runs the program from my PC over an Ethernet cable,this eliminates having to break programs into pieces.

[tom@vp]

ok, do you filter ? that is question im asking but is getting over looked.

one arc movment can be broken into 100 or more line segements, or you filter, the filter flips the program with work plane g17/g18/g19 and writes a simple arc movement as a XYX IJK move in one line, this can reduce a single pass on a part from a 1000 LINES TO 1, 10 OR 100

but if you just select surface and say go, yea you can write a program way too big, and say hey i wrote the biggest 3d program in the world, when it didnt need to be...

[dkf]

Tom, I do use the filters to minimize line segments.

Looks like he answered your question.

[tom@vp]

but i said arcs not lines... i was trying to help, not hurt... i quit... have a nice day..

[tom@vp]

Originally Posted by dkf

I'm just glad the CNC control manufacturers are actually starting to put some memory on their controls so you can get away from drip feeding. Paying $4k for 4mb of memory really sucks.

Arcs ad tons of code especially during the finishing operation with a very small stepover. You can only make the minimum arc lenth so large depending on the geometry being cut.

yea only american companies, fanuc still thinks memory is worth 20k for 2 megs.