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Implants
WTH Screw retain prob
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<blockquote data-quote="JohnWilson" data-source="post: 245802" data-attributes="member: 213"><p>Milling temps on cad bases and the respected fit has more to do with you managing your cam/mill. The drill compensation is built into the cad design via the library and the tolerances are tight. Get your directions slightly off and undermill a tad and this is a problem. If your CAM will allow you to run std deviation simulation to check use it. RED is not good.</p><p></p><p>Also there is a thing called Tool deflection that most do not talk about or discuss. It basically say as the force of the spindle pushes the bur laterally you have a tool that bends. This feed rate combined with the step over/rpm can be adjusted on certain CAM software to help eliminate this problem. Setting a strategy to do fine milling inside the holes 2 times on PMMA can also solve the problem.</p><p></p><p>Also there is a reason why some cad base mfg have std and oversize cad files for their bases as a band aid as most techs do not want to learn past push and nest.</p></blockquote><p></p>
[QUOTE="JohnWilson, post: 245802, member: 213"] Milling temps on cad bases and the respected fit has more to do with you managing your cam/mill. The drill compensation is built into the cad design via the library and the tolerances are tight. Get your directions slightly off and undermill a tad and this is a problem. If your CAM will allow you to run std deviation simulation to check use it. RED is not good. Also there is a thing called Tool deflection that most do not talk about or discuss. It basically say as the force of the spindle pushes the bur laterally you have a tool that bends. This feed rate combined with the step over/rpm can be adjusted on certain CAM software to help eliminate this problem. Setting a strategy to do fine milling inside the holes 2 times on PMMA can also solve the problem. Also there is a reason why some cad base mfg have std and oversize cad files for their bases as a band aid as most techs do not want to learn past push and nest. [/QUOTE]
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