P.S. Jamman Sorry about the thread hijack

L Hanft, That is a fantastic link with lots of practical applications. I was reading at the top about Pascal's Law and it seems like it could be derived from Bernoulli. Presure in = Pressure out. or Force/Area in = Force/Area out. Couldn't you just equate these in the post from Millman?

greg, When I made the jump from V6 to V9.1 I hated to do toolpaths for about a month. Coming up on a year now using V9.1, you couldn't get me to go back for anything. Keep at it man, V9.1 blows away what you had before. Stumble through it for the next few months and you will begin to love it. I guess it's one of those delayed gratification things.

All of what I have said above neglects internal forces in the fluid and minor losses. Where is that darn Bernoulli equation when I need it? +1 to Murlin for the pressure valve and the observation that the situation just isn't practical

Here's another way to think of it. Think of 100 PSI as 100 Pounds per Square Inch. If you have 113 square inches per my last post your force will be 100 pounds in each of those square inches, or 100 pounds added 113 times. This is 11300 pounds of force. All that force has to go somewhere when you open the valve on the bottom of the bucket. What ever your surface area across the valve or tube or whatever you use coming from the bucket will govern the pressure, or Pounds of Force per Square Inch. You are dealing with 11300 pounds of force that has developed. This is DANGEROUS. Think twice before trying this or get help in person from someone who is farmiliar with hydraulics. Consider this a friendly warning!!!!!

OK here goes..... I just measured a 5 gallon pail to be 12 inches in diameter. If we assume that the taper on the bucket is negligible then the surface area of liquid at any level in the bucket is A = pi * r^2 = pi * 6 ^2 = 113 in^2. Now, if you put a lid on and pressurize the bucket to 100 PSI the force on the liqiid is 113(in^2)*100(lb/in^2)= 11300 lb Let me just say that this is a big number. Your PSI output is dependent on the surface are of your output orifice. For instance if you are using 3/8" ID tubing out of your bucket the surface area is 0.11 in^2. So the pressure would be 11300(lb)/0.11(in^2) = 102727 PSI. This is a really HUGE number. As a matter of fact this is down right dangerous. The cool thing about hydraulics is that you can build up huge pressures with a little bit of force and a big surface area. You can do your own calculation using this framework and find out what you need the pressure to be. You will also need to maintain the same pressure as the bucket is draining. Some kind of regulator on the line may help. Good luck and dont get hurt!!!!!!!!

Mayday, I have the same question. I always have my filter set to 2:1. I have read the help fime in MC but would appreciate another explanation of the ratio setting and specifically how it will affect my part both dimensionally and visually.

+1 Murlin You can always go back to the blank level and retrieve your untrimmed surface. it can be somewhat of a PITA but it usually gets me where I need to go

Try Engineers Edge they have that kind of stuff.

Glen, Is that sig courtesy of Zaphod Beeblebrox???

Leehound, I saw the same thing. How do they attach those????

Send him a bill!!!!!!

James, Seco claims that you can go up as high as .120 ipt both my ba!!s are not that brassy!!!

Greg, We use Seco high feed mills and they are awesome. We take 0.04" DOC, 2" radial DOC at 750 RPM and 75 IPM in 45Rc H-13 all day long in an interrupted cut with a 2.5" face mill. This can be pushed to 150 IPM if the cut is not interrupted. I define the tools as bull mills. In the manufacturer literature they give a corner radius to enter. For ours it is 0.091". This is not the actual radius but it works for defining the tool. We use these tools for roughing operations so the little bit of extra material that is left by the funky radius value that you enter isn't critical. If anyone out there has never tried these mills, DO IT. If you need to remove a lot of material and you have a rigid setup, these things fly. The first time you see one run it WILL scare you but man do they work well.

Divide and conquer, divide and conquer........

G Caputo, Hey, no harm done!!!! I just want to document it here that I am the one that came up with the idea for gas-guzzle fest.

G Caputo, You have every right to quote: pay $50 or more a week at a gas station than to risk my life or especially my wife's life buy driving some sardine can around No one is saying you should be prevented from doing so. Do it all you want, heck drive up to the pump and pay for every one at the station to fill up for all I care. Sponser gas guzzle-fest '04, brought to you by Shell, BP and G Caputo. Whatever!!!!! This is supposedly a free country and you can do what you wish. I just find it interesting that there are many more comments about high gas prices that about the guy that is thrilled to pay $50 for gas with the reassurance that his family is safer in a larger vehicle. This is not directed at you personally, just an overall observation. I think people are much more willing to complain about their situations than take a step back and be thankful for the situations that they are in. Just my 2 cents

When those 2 or 3 days are up wont people just go get gas then???? The oil companies will make the same $$$$$ and wont change their pricing. The only way to really address this problem is to drive less with more fuel efficient cars. If you wait a week or two and then buy gas the oil company has you by the short hairs. They know that no matter what, people will come crawling back as long as they own Hummers, Excursions, Avalanches, full size pickups, etc...... We are captive as a nation to our inability to curb our cravings to express our manliness by owning and driving monstrous vehicles. I am not saying that people should not be allowed to buy and own these vehicles, just don't bi**h when you pull up to the pump and have to lay down $50. If you really want to pinch the oil companies go buy a shiny new Prius and fill up the 12 gallon tank every six hundred miles. Then they will start to feel it.

Here's what I do for our forging cavities: 1. Surface rough pocket (usually with 3/8" Ball Mill) 2. Surface finish scallop (1/4" BM with a stepover of 0.03") 3. Surface finish leftover (using my finish radius tool around 0.062" and a 0.01" stepover to dig out the corners) 4. Surface finish scallop (with my finish tool and somwhere around a 0.003" stepover counter clockwise from the inside out) I have found the scallop pass with the .250 ball mill necessary because the surface rough pocket will leave material at the bottom of the cavity at the final pass. This can be almost 0.050" with a 0.05 stepdown and lets just say it does bad things to your finish tools.

I use surface project a lot for projecting flat pockets onto surfaces, but when I project an old nci I never thought of importing it and then projecting it with surface project. I tried it and it works just as well!!!!!!

Roger, I've never done it that way, I always just projected the nci with toolpath project. That what I love about this place, always something new to learn.

We use project nci rarely but when we do, man do we need it. Toolpath trim is also great, it works really well to trim swept toolpaths. I could find a work around if either were eliminated but, like others have said, why reinvent the wheel?? Bury it deep somewhere so that those of us that need it can use it but dont get rid of it!!!!!

Mark, Well that about wraps it up for that one...

To me the save-time for autosave is definitely worth it. Minbe will run for 20+ seconds sometimes, but if I am 'in the zone', it is really a PITA if the system crashes and I have to go back and replicate everything I have done for the last 15 or 20 minutes. So the deciding factor becomes, can you wait that extra few seconds to cover your butt with autosave or does it not make that much difference for you to go back and redo work you have already done. From this end, it's worth it.

Where can i get info about these classes?