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Post by jroetz on Jan 19, 2021 14:52:59 GMT -5
2" HDU, cut with a 2-1/2" HDU bit (Amana Tool 46272), 8 passes, 0.250" per pass, I can't seem to get a smooth cut. Tried varying the feed rate, climb and conventional cutting, nothing seems to help. Any ideas? Attachments:
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toddd
New Member
Posts: 62
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Post by toddd on Jan 19, 2021 22:04:01 GMT -5
2" HDU, cut with a 2-1/2" HDU bit (Amana Tool 46272), 8 passes, 0.250" per pass, I can't seem to get a smooth cut. Tried varying the feed rate, climb and conventional cutting, nothing seems to help. Any ideas? Have you tried a last pass at full depth since your bit is long enough? Maybe .01 |
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Post by jroetz on Jan 20, 2021 10:16:04 GMT -5
Yes, I've thought about this, however, I'm still curious to know what the issue is with my cuts.
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Bob
Junior Member
Posts: 129 
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Post by Bob on Jan 20, 2021 11:12:45 GMT -5
How was this secured to the table? Which side was up? (It looks like the material was undercut. That's why I ask.) What feeds were used? What speeds were tried? Is the bit perpendicular to the table?
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Post by jroetz on Jan 21, 2021 11:49:14 GMT -5
In this view, I had already turned over the material, it was cut from the bottom up in this view. Speed was 60 ipm, 18,000 rpm, yes perpendicular.
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johnb
Full Member
New owner @ March 2019, AR16 Elite, Aspire, 4th Axis & Laser
Posts: 326
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Post by johnb on Jan 21, 2021 13:02:21 GMT -5
In this view, I had already turned over the material, it was cut from the bottom up in this view. Speed was 60 ipm, 18,000 rpm, yes perpendicular. Considering that the photo is upside down, this looks like you somehow had a stepover (in the "wrong direction") with every pass. I'm curious as to whether the size on the (original) top ended up correct and how much that varies from the same measurement on the (original) bottom. |
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Post by Chad on Feb 1, 2021 8:58:41 GMT -5
2" HDU, cut with a 2-1/2" HDU bit (Amana Tool 46272), 8 passes, 0.250" per pass, I can't seem to get a smooth cut. Tried varying the feed rate, climb and conventional cutting, nothing seems to help. Any ideas? What what the RPM and feed-rate for this tool-path? It looks like the tooling marks are seen on at all sides correct? This would typically be due from bit deflection, which with a 2.5" cut length bit...deflection will be very easy if the cutting parameters are more on the aggressive side. |
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