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Rifles, Reloading, Optics, Equipment
Gunsmithing
Cutting dovetails, how hard can it be...
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<blockquote data-quote="Jinx-)" data-source="post: 631557" data-attributes="member: 19791"><p>I set Bridgeport for some dovetail cutting using 1 3/8" cutter by F.K.D, I was running 100 RPM and feeding 3.0 IPM for plain 1020, I had radius comp on, which initially was 250 thousands more then actual tool radius and conventional milling, anyway after first pass which took .100 I decreased radius comp by .05 and then it happened, my coffee mug felt from work table, it was like the whole table with my part was beating against the cutter, I reduced feed rate almost to 0.5 IPM and only then beating stopped, but it still chatter. So what have I done wrong, I was running HSS tool using optimal speeds and feeds... </p><p>Here few images when chatter started:</p><p></p><p><img src="http://img3.imageshack.us/img3/841/dovetail5.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p><img src="http://img832.imageshack.us/img832/5288/dovetail6.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>here I reduced feed rate, but it still chattered </p><p></p><p><img src="http://img20.imageshack.us/img20/3092/dovetail7.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="Jinx-), post: 631557, member: 19791"] I set Bridgeport for some dovetail cutting using 1 3/8" cutter by F.K.D, I was running 100 RPM and feeding 3.0 IPM for plain 1020, I had radius comp on, which initially was 250 thousands more then actual tool radius and conventional milling, anyway after first pass which took .100 I decreased radius comp by .05 and then it happened, my coffee mug felt from work table, it was like the whole table with my part was beating against the cutter, I reduced feed rate almost to 0.5 IPM and only then beating stopped, but it still chatter. So what have I done wrong, I was running HSS tool using optimal speeds and feeds... Here few images when chatter started: [IMG]http://img3.imageshack.us/img3/841/dovetail5.jpg[/IMG] [IMG]http://img832.imageshack.us/img832/5288/dovetail6.jpg[/IMG] here I reduced feed rate, but it still chattered [IMG]http://img20.imageshack.us/img20/3092/dovetail7.jpg[/IMG] [/QUOTE]
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Cutting dovetails, how hard can it be...
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