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Lab talk, the good, the bad, and the ugly
Dental-CAD
SUPER-FURNACE!!! (Sintering)
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<blockquote data-quote="DMC" data-source="post: 57173" data-attributes="member: 430"><p>Of course, if you think you are a know it all.....you can try to set it up yourself and see how it works? Skip the auto-tune. But, as the temp rises in the elements..their resistance changes. It's not a flat change, but a curve. It's kinda tricky IMO to dial in the current and cycle times to hold a temp. I can't do it better than the little computer.</p><p>It's like trying to dial in the air-fuel ratio for a car at various loads and rpms. Takes forever to do manually! Thank god for wide-band 02 sensors and computers~!</p><p></p><p>I messed with it for hours and figured out I had no idea what I was doing years ago. I though I was hot-sh1t for a while. I'm not.</p><p></p><p>If you are way wrong...your furnace will go too far beyond your high temp...then dip too low below the high temp as the computer just follows orders as to when to open and close the circuit. You could also fry your elements by sending too much current to them before they get above 400-500C in the beginning of the cycle. You'll crack them.</p></blockquote><p></p>
[QUOTE="DMC, post: 57173, member: 430"] Of course, if you think you are a know it all.....you can try to set it up yourself and see how it works? Skip the auto-tune. But, as the temp rises in the elements..their resistance changes. It's not a flat change, but a curve. It's kinda tricky IMO to dial in the current and cycle times to hold a temp. I can't do it better than the little computer. It's like trying to dial in the air-fuel ratio for a car at various loads and rpms. Takes forever to do manually! Thank god for wide-band 02 sensors and computers~! I messed with it for hours and figured out I had no idea what I was doing years ago. I though I was hot-sh1t for a while. I'm not. If you are way wrong...your furnace will go too far beyond your high temp...then dip too low below the high temp as the computer just follows orders as to when to open and close the circuit. You could also fry your elements by sending too much current to them before they get above 400-500C in the beginning of the cycle. You'll crack them. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAD
SUPER-FURNACE!!! (Sintering)
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