Enable the ARCFIT switch. Depending on the tool path that you specify, you will have to search for the switch.

Search the forum for "DNC". This topic is a repeater and there are some good solutions already provided. (See item 2 in the Forum Guidlines) [ 10-31-2002, 12:06 PM: Message edited by: Andrew McRae ]

Scott - I have never laughed out loud reading the forum. Until now.

On calculations - I had an engineered multi diameter/pocket tool on an SPM with only 5HP avail. I calculated the arithmetic sum of the power draw on each insert using these formula and found we were within 3% of the actual total (@90% efficiency). Customer was trying to get more features on the station but we convinced him that an additional station on the SPM was the way to process the part. Kennametal also has a decent technical section.

Thinking on this more and using the following guidelines - 1) Never buy a two inch cutter with three teeth... 2) Cat40 Max Diameter for a Shell Mill 3", Cat50 Max diametet for a Shell Mill 5" 3) Faster is better Using formulae from previous post, Lets buy the proper cutter for the application, a 2" with 4 teeth. F= 1146 * .0197 * 4 = 90.3 ipm or a 3" with 6 teeth F= 764 * .0242 * 6 = 110.93 ipm Lets find out if this is a good fit for the machine. Power consumption - (open the Sandvik Catalogues and turn to the Technical Sections) Vp: Metal Removal Rate per Horsepower Vp=396000/Kc - Kc (Specific Cutting Force) Vp=396000/290000 Vp=1.365 Pc: Net Power Pc=MRR/Vp Pc=.25*.15*110.93/1.365 Pc=3.05 Hp - With our 7.5HP Fadal or Haas... We should draw about 50% At full engagement though F=764*.007*6 F=32.1 Pc=MRR/Vp Pc=3*.15*32.1/1.365 Pc=10.58Hp - Machine has just stalled and all the cutting edges broke. We will never be able to take a full cut at proper depth so the Cutting tool guy just upsold us because we thought he was able to do magic at .25" radial width of cut!

Laz fires up his 5ax Lazer Trimmer with Scott clamped to the table... "Do you expect me to answer your questions Goldfinger?" "No, I expect you to die Mr Bond..."

ROFL

Options - Features that already exist in the machine controller - but cost US$1800.00 to have some service tech come in for 5 minutes and enter a magic password.

Honda, The heartbeat of the Orient...

Please help, any others with old Monarch spindles and surplus tooling, please send information if you would like to seel some - or where you are successful at procurring these items. Monarch themselves have little inventory left and to get them to custom make holders will cost us the farm. (Spelling edit) [ 10-30-2002, 08:45 AM: Message edited by: Andrew McRae ]

Interesting, You need to find ordinate dimensions so that the shop floor guys can enter data into another form of a CAM package... Wait a minute, Run over to you manager and slap him/her in the head and say "Andrew thinks your a moron - Buy Mastercam so I can do my job!"

We have tried to coat our cutter bodies with 1018 material using this same technique! Blue looking colour smudges are a nice effect!

Right click on the operation in the OPS manager and set posting to off. This way the origional geometry should not be posted. Will this accomplish your objectives??

Post a process model and we will see more of the specifics. Thanks,

I am thinking of a Highfeed style approach to this problem. If we are milling across a face that has openings, then we can insert feed changes as required - higher feeds in areas of lighter radial DOC. If this is an open face (no shoulders to come up against) then we would modify the lead angle by selecting either a 15 degree tool or something along these lines to prevent part edge frittering or burring. HP and Spindle information would be important if we want to use one of Iscar's Mill 2000 or Tangmill cutters. These things will draw power like crazy. As well, as we increase the lead angle of the tool, the length of the cutting edge increases drawing more power from the spindle. I am working up a drawing to illustrate some of Hugh V's suggestions and can only point out that Hugh is missing Radial Chip Thinning in his assertion, there are apparent reductions when you run the following numbers SFM=600 *FPT=.007 NoTeeth=3 1" F=2292RPM * .007 * 3=48 ipm 2" F=1146RPM * .007 * 3=24 ipm For the same full engagement and given the same depth of cut (.150") the cutters would have the same MRR. (I think that this is this what you are saying Hugh, please elaborate) But now lets look and take a radial engagement of .25" and see the effects. In order to maintain the same actual (Hm=average) chip thickness, use the following FPT=Hm(SQRT(Dia.Cutter/Width)) For the 1" at .25 width FPT=.007(SQRT(1/.25)) FPT=.014 For the 2" at .25 width FPT=.007(SQRT(2/.25)) FPT=.0197 Now lets use the modified values in the feed formula 1" F=2292RPM * .014 * 3=96.26 ipm 2" F=1146RPM * .0197 * 3=65.32 ipm With the same Depth of Cut, the MRR is greater for the 1" Hugh wins...

John, Here are my questions... 1) Material (this will help with specifying what Insert Grade) 2) DOC - WOC (or post file of what you want to do) 3) Machine style, and Spindle ( IE Vertical CAT 50) 4) Machine Horsepower, Max Feedrates, etc... Anything else that you think may help. I love this stuff! IC950 is a decent hard carbide for high temperature milling - Needs to Run Dry!. IC328 is a Tough Carbide that likes to run slow with Heavy Feed (And it Loves Coolant!)

Triple on exit... This is brilliant! The spindle must stop anyway and reverse, as it is synchronous - why not rev the hell out of it! I suggest caution on materials that like to shrink onto the cutting tool (Copper, Brass, etc...) but for Cast Iron, and Steel - "J1000" - Note, I bet the controller will max out the spindle speed (on an acceleration curve) and match the Feed Axis to suit! I have just learned something today. Thanks to all.

Jack, At the conclsion of the trial my lawyer suggested that I never repeat any of the details...

Dave, Full agreement. Nice to see we share the same vision for the use of the Webforum and our user base. Here is a question though, how much weight do we here at eMastercam have in the development of new features in upcoming software releases??

Inspired by Jack... The Funnelerator During my University time, we had concocted an assembly of Surgical Tubing and a Large Funnel into a giant Sling Shot (Before they were commercially available). We used these to fling Water Ballons into convertable Volkswagens during PepRallies. (The girls from "I Phelta Thi" got drenched may times...) Anyway, there was a tragic recurance during a alcoholic induced New Years Eve (Nice and clear, cold -30C Ontario Winter Night.) We had some left over tubing but no funnel, so we used the next best thing, a piece of Nagahide... (The thermal properties of nagahide are that at -30C the material will maintian its shape! herein lies the lesson.) We constructed our crude device and then set out for testing, As the snow covered everything we used at first snow balls. Due to the muzzle velocity of these snow balls they immediatly disintegrated. We needed something more solid. My Pal Will found a Brick! I inserted the brick into the pocket, pulled back on the tubing (Associates on either end complete the Giant Sling Shot!) and let it go. (The brick had forced the nagahide to form around it). As the brick accelerated forward there was a rushing air sound, stop and then a rushing air sound as the brick - still in the pocket as it haden't released - reversed and flung itslf right at me. This time, the brick did release and smash right into my right shin with a hollow thud noise I have never heard this before or since... Luckily, I was already medicated and so the pain was managable, My associates all had their fill of laughter at my expense, the bruise was nasty. They relived this story at my wedding reception, for which another thread will need to be started. How was that Jack?

The Definitive Post on the Subject. How much money did you cost yourself by buying cheap? Studies show that cutting tool costs are in the order of 3-4% of the total hourly operating cost of a CNC Machine (Seco and Sandvik Literature). Think about this for a minute. If you spend 5 hours doing a job instead of 1 hour, just to save $3.00 on an insert, then you just gave your customer 4 hours of Free Machining... (for which you could have invoiced someone else for that time!) Send Back that US SHOP CRAP and get a hold of the Iscar Guy again, Partner with him, or the Sandvik Guy, or the Kennametal Gal, or one of the Japeneese Cutting Tool People and work closely with those who understand what they sell. Catalogues are for buying "Soap, Dope and Rope" not engineered tooling! Sorry for the "Mayette Style" answer but see the real deal below. Cutting Tool Selection. Material Removal Rate (MRR) is the measure of what you really need to ask yourself. This includes the Cutter Body (Diameter, No of Teeth, Spindle Speed, Width of Cut), Insert Grade/Geometry (SFM, Feed per Tooth, Depth of Cut), Setup Style (Horizontal/Vertical - for determining if Recutting Chips is a problem), MRR = RPM * FPT * No of Teeth * DOC * WOC Thinking of all these parameters, see if there is an advantage to using 4 corners on a reduced MRR setup. Oh and BTW - Let me know your address so I can attend the Auction when you go out of Business. [ 10-28-2002, 12:39 PM: Message edited by: Andrew McRae ]

Excellent xxxxhing Dave, In all seriousness, are we forbidden to discuss products other than CIMCO, Predator or Mastercam or is the objection to the site a robot that sucks prospecting information from this user base to further advance a competitor product. Discussions of CAD/CAM market conditions are healthy, sleazy prospecting techniques are not. My opinion counts... I spend therefore I am!

One way to help yourself out during setup is to prestage the next tool and then jam it into the waiting pocket (regardless of the number on the chain). Our old OKK will allow us to change the numbers of the tools in the pockets with a parameter page. The control keeps track of what tool number is in what pocket so don't worry to much about it.

The Syncronous Taping OPtion should use a Soft Synchro Holder like the following. Emuge Holders Tapmatic also makes something like this. Regofix will supply a nut where a sealing disk can be used for coolant thru tapping (Highly recommended!)

Jack, If you G00 thru tubing you will get a G(Oh Oh!) Always use feed, otherwise one catch at rapid will pull the part out! Doesn't the mazatrol have a tubing cycle?? [ 10-25-2002, 08:42 AM: Message edited by: Andrew McRae ]