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Lab talk, the good, the bad, and the ugly
Dental-CAM
Grinders keep burning emax and breaking tools
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<blockquote data-quote="HygienicBee" data-source="post: 302087" data-attributes="member: 21021"><p>I was milling a pretty simple crown, on the straumann M series mill.</p><p></p><p>The coolant was fresh as can be, and this was only the second crown being milled after fresh coolant was put in.</p><p></p><p>I've added my nesting below, it mostly follows what you've mentioned, although my co-worker advised I put the sprue on the lingual side of the crown. I'm not sure if that would be my fatal flaw here</p><p></p><p>If I still had the block I would upload a photo, but it did fine trimming the material during the first phase, milled out the interior fine, as soon as it tried to mill the outside is when it left a large burn streak as well as broke as it was grinding near the sprue. Looked as though it had gotten jammed in a spot where coolant was unable to cover the grinder. </p><p></p><p>Thank you for the information as well, I do believe these two machines follow very similar strategies.</p><p></p><p>[ATTACH=full]32553[/ATTACH]</p></blockquote><p></p>
[QUOTE="HygienicBee, post: 302087, member: 21021"] I was milling a pretty simple crown, on the straumann M series mill. The coolant was fresh as can be, and this was only the second crown being milled after fresh coolant was put in. I've added my nesting below, it mostly follows what you've mentioned, although my co-worker advised I put the sprue on the lingual side of the crown. I'm not sure if that would be my fatal flaw here If I still had the block I would upload a photo, but it did fine trimming the material during the first phase, milled out the interior fine, as soon as it tried to mill the outside is when it left a large burn streak as well as broke as it was grinding near the sprue. Looked as though it had gotten jammed in a spot where coolant was unable to cover the grinder. Thank you for the information as well, I do believe these two machines follow very similar strategies. [ATTACH type="full" alt="32553"]32553[/ATTACH] [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAM
Grinders keep burning emax and breaking tools
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