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Lab talk, the good, the bad, and the ugly
Metal
Rocking frame on 5 unit bridge
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<blockquote data-quote="charles007" data-source="post: 188708" data-attributes="member: 9"><p>Did you survey the bridge to see if it draws ?</p><p>If you don't have a surveyor find a lab with a scanner to check ...... send out to Argen or Bego for DPM/print-cast.</p><p>Quick solution is waxing thin copings and loot to a metal mandrel or bur and trying to lift off the model</p><p>to see if the patterns will draw without breaking the patterns or chipping off the margins.</p><p>If the coping draw without breaking the wax patterns your warping is caused by your spruing technique,, maybe the curved sprue bar ?</p><p>If that's the case, try direct spruing using reservoir sprues.</p></blockquote><p></p>
[QUOTE="charles007, post: 188708, member: 9"] Did you survey the bridge to see if it draws ? If you don't have a surveyor find a lab with a scanner to check ...... send out to Argen or Bego for DPM/print-cast. Quick solution is waxing thin copings and loot to a metal mandrel or bur and trying to lift off the model to see if the patterns will draw without breaking the patterns or chipping off the margins. If the coping draw without breaking the wax patterns your warping is caused by your spruing technique,, maybe the curved sprue bar ? If that's the case, try direct spruing using reservoir sprues. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Metal
Rocking frame on 5 unit bridge
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