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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Milling wax veneers
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<blockquote data-quote="CoolHandLuke" data-source="post: 280729" data-attributes="member: 4850"><p>good info, i only want to say its not always a good idea to go slower. there is a relationship between how fast your spindle spins, and how quickly it moves point-to-point. this relationship is referred to by many CAM softwares as Cutting speed (as opposed to Spindle speed, or Table feed which are the factors of Cutting speed)</p><p></p><p>varying a single parameter of Cutting speed can be good, but also can be bad. in soft materials like zirconia and wax and plastic it is highly advantageous to use high cutting speed, especially if the machine can be kept vibration-free. in hard materials these kinds of high speed passes sometimes arent feasable. </p><p></p><p>for wax though, much as with plastic you want to push through the material quickly so that the spindle doesnt sit on any area long enough to create residual heat and melt the wax. too slow and you can have material "gum up" the tools. </p><p></p><p>for thin things though, no matter really what it is, veneers in wax, or thin zirconia, or thin titanium copings, avoiding chipping is the biggest objective, and the best guarantee of that is sharp clean NEW tools.</p></blockquote><p></p>
[QUOTE="CoolHandLuke, post: 280729, member: 4850"] good info, i only want to say its not always a good idea to go slower. there is a relationship between how fast your spindle spins, and how quickly it moves point-to-point. this relationship is referred to by many CAM softwares as Cutting speed (as opposed to Spindle speed, or Table feed which are the factors of Cutting speed) varying a single parameter of Cutting speed can be good, but also can be bad. in soft materials like zirconia and wax and plastic it is highly advantageous to use high cutting speed, especially if the machine can be kept vibration-free. in hard materials these kinds of high speed passes sometimes arent feasable. for wax though, much as with plastic you want to push through the material quickly so that the spindle doesnt sit on any area long enough to create residual heat and melt the wax. too slow and you can have material "gum up" the tools. for thin things though, no matter really what it is, veneers in wax, or thin zirconia, or thin titanium copings, avoiding chipping is the biggest objective, and the best guarantee of that is sharp clean NEW tools. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
All Porcelain-Press
Milling wax veneers
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