Surface
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Everything posted by Surface
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I'd put the reamer in a manual machine to get a feel for how it cuts.
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Containment boundaries in core roughing not working??
Surface replied to Bruce Caulley's topic in Industrial Forum
It's been my experience with core-rough, the containment boundary does little to control the entry/exit point, but once it is cutting, it will maintain the containment boundry's integrity. If you need to control the places where the entry/exit occurs i.e. off the part, your going to need to use a "dummy" surface. Or an alternitive method, which is more like the traditional surface/rough/pocket, is to use highspeed/area-clearance. -
A very timely topic. I am going to try broaching in my VMV in the next day or two. My part is calling for a sharp-blind-corner. I was thinking of creating a series of "L" shapes (rather than drill points) and use a 3D contour with the spindle stopped. I don't know how well this will work, but my thought was to broach the corner, then drag the chip.
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quote: so I could show the part in my second op What is it you are trying to do that a leftover-toolpath won't do? quote: it isn't a solid its just lines. I think that's the nature of an stl file.
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I beleive there is a copy of ME Colsultant on Jay's FTP. It has a section for measuring over wires.
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That was my attempt at humor. 4 inch aluminum plate with a 3/4 top plate. I don't think I could afford to make a vacuum table from that. It's perhaps a little overkill. What are you trying to hold?
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Is you boss's name Alcoa?
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If the AJX cutter would work, this would be an ideal application. I need to remove 12 pounds of material per part. And in Ti, 12 pounds is a lot of material, something like 70 cubic inches.
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I guess it's the decimal point that MC is having trouble with. It will calculate whole numbers.
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In a 40 taper machine 10K max rpm , I'd like to use this 1.25 Mits AJX for roughing and finish with a .250 flat and .500 ball. I probably use either SGS-Zcarb or Niagra Stabilizer with TiAlN for finish.
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In previous versions of MC, I could use the spindle-speed and feedrate dialog boxes to do math functions. ie, on the tool-parameters page, I could type "3.8*80/.25" and it would calculate for RPM. I seem to have lost that funcionality in X2
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The highfeed milling cutters are impressive when moving a lot of steel, but in the catalogue, I don't see any speeds/feeds listed for cutting 6al-4v. Anyone have any experence they could share?
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I didn't try, but I can't think why it wouldn't work. Change the "adjust feed on arc" button located in the machine-group-properties. Then, after generating the desired toolpath, Lock the one opertation. Change the "adjust feed on arc" back to normal and regenerate-all.
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Turn it into chips....The time saved by ramping that type of pocket is outweighed by other factors. A 1/2 inch endmill will pocket all the material in a conservative 3 minutes. Compare that with drilling two holes, screwing in two bolts, ramping and then removing two bolts. Add additional programming and setup and you have spent more time per part. Additionally, it was necessary to stand at the machine resulting in further downtime. For the small radius, try to plunge the corner first with a low rpm, say 400rpm, will eliminate any chatter.
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I think the HSM-toolpath may work best. in this type of pocket, it's been my expereince that a 2D pocket tends to cut a lot of air.
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On this part, I need to machine a grid/pocket for a vacuum and I would like a recommendation for the most efficient toolpath. I could also use some recommendations for feed-rates and depths of cut. Limited to 12,000 rpm, 1/32 endmill, aluminum. Channel finishes 1/32 deep. I could do this as a 2D pocket with islands, or it could be done with a surfaceing toolpath. Your input is appreciated.
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RELAX... I DON'T WANT A FREE POST. I just purchased a new Haas VF2SS with the Renishaw probe and tool setting package. I'm not seeing anything in the generic-Haas post or MPFAN which takes advantage of these features. Either post can be modified and tweaked, but why reinvent the wheel. I'm sure someone has already customized one for this machine. If you have a post or know of a post which would work better with this machine than the posts which come on the CD, could you please let me know and I will have my reseller acquire it. Thanks Mastercam MR2
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There is/was a Chook for creating surfaces from an STL. Again, it wasn't the most efficent because, if I remember, created a seperate surface in each prism. Perhaps thats worth a try.
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There is a "high-feed" button in the operations manager which will not alone optimize the feedrate by looking at the volume of material to be removed, and can also slow the feedrate when the cutter makes sharp corners. I think there is a documentation how to set it up and use it (high-feed.doc) if not on the disk, then on the ftp.
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Thanks
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Pip, I put the file, (hinge-block) in the files-to-be-converted-to-MC folder
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Does anyone have a copy of ProE or a ProE translator who could help me convert this file into something I can read. Thx
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Solid/layout
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There's a lot of different factors which go into calculating speeds/feeds when cutting 4340. As with a lot of tool steels, the first consideration is the condition of the material, but also you must weigh the rigidity and condition of the tool and setup, coolant, as well as the quantity and value of the parts being made. 4340 tends to workharden as well as being susceptible to hardening via heat. All things considered, I probably recommend starting around 100-125SFM (380-475rpm)and .0015-.002FPT, removing the material in 2-3/16 passes, and then one pass to pretty everything.
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I have long wondered why it is necessary to use G8P1 and G5.1Q1 (AICC) commands to turn on functions which increase the buffer size and allow the machine to cut more accurately and fluidly. Does anyone ever complain that the machine is too accurate? or the buffer size too large? So why don't these codes come on by defalt?