viddall
New Member
Posts: 33
Location: Maryland
Machine: Power Route
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Post by viddall on Feb 5, 2019 2:33:37 GMT
Need help calculating/verifying Feed, Doc & CL, for the Power Route : Calculator only goes down to 1/16"
End mill 0.05" , 2 Flute
Spindle (8k, 12k)
Conservative, Normal only
Aluminum 6061
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I guestimated
RPM: 12000
Aggression : Normal
Feed Rate : 545 mm/min
DoC: 0.5 mm
CL: 0.02 mm/tooth
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Post by riotonthebay on Feb 5, 2019 3:01:37 GMT
With the massive caveat that I don't have my PR yet and I'm just reading and learning this stuff myself: Your guestimate seems accurate. I found a similar tool here from Harvey Tool: www.harveytool.com/secure/Content/TechInfoPages/SpeedsFeeds/SF_72000.pdf. This chart recommends 0.00075 in/tooth, which is 0.019 mm/tooth. The chart also says the tool can handle 1000 SFM (their tool, at least). To max that out, you'd need a 75k RPM spindle, so your best bet is to max your spindle and adjust everything accordingly, which you did. I think you might be overshooting your desired chipload slightly using that feed rate, may want to bring it back to 480 mm/min (0.02 mm/tooth x 2 teeth x 12k RPM). I've also read/heard that things change a bit once you start using cutters under 1/16"… so best of luck!  Let us know how it goes. |
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viddall
New Member
Posts: 33
Location: Maryland
Machine: Power Route
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Post by viddall on Feb 5, 2019 10:57:03 GMT
With the massive caveat that I don't have my PR yet and I'm just reading and learning this stuff myself: Your guestimate seems accurate. I found a similar tool here from Harvey Tool: www.harveytool.com/secure/Content/TechInfoPages/SpeedsFeeds/SF_72000.pdf. This chart recommends 0.00075 in/tooth, which is 0.019 mm/tooth. The chart also says the tool can handle 1000 SFM (their tool, at least). To max that out, you'd need a 75k RPM spindle, so your best bet is to max your spindle and adjust everything accordingly, which you did. I think you might be overshooting your desired chipload slightly using that feed rate, may want to bring it back to 480 mm/min (0.02 mm/tooth x 2 teeth x 12k RPM). I've also read/heard that things change a bit once you start using cutters under 1/16"… so best of luck! Let us know how it goes. For my smaller 0.05" end mill, I set up my guestimate based on the percentage reduction the MCC tool reveals as you decrease end mill sizes for different speeds. New guestimate (hopefully conservative enough) ----------------- RPM: 12000 Aggression : Normal Feed Rate : 480 mm/min (As suggested above) DoC: 0.5 mm (40% of the cutter Dia) CL: 0.02 mm/tooth (70% redux of the CL for 1/16" end mill - same settings) Thanks for the feedback |
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viddall
New Member
Posts: 33
Location: Maryland
Machine: Power Route
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Post by viddall on Mar 6, 2019 19:13:30 GMT
update:
Milling Good and Slow
Tool: 2 Flute
Cutter Diameter : 1.77mm Cutter
Spindle: 12k
Cutting Feed: 150mm/min (Lead in and Lead out same)
Ramp Feed: 50mm/min
Plunge Feed: 25mm/min
There's another lad on millright using 1mm cutter & 200mm/min Cutting Feed. I'm down to my last end mill and stayed more conservative.
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Post by Derek the Admin on Mar 6, 2019 20:18:59 GMT
Those should be good and safe.
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Let us know how it goes.
