Tammyt Posted February 8 Report Share Posted February 8 Hi, I have a new Cone Art Kiln with a Bartlett programmer. I have fired 5 times and each firing has been at least two hours longer than the program indicates. My test cones are perfect so I am wondering what affects the kiln firing times. Quote Link to comment Share on other sites More sharing options...
neilestrick Posted February 8 Report Share Posted February 8 @Tammyt What model kiln is it, and which firing program did you use? In general, not all kilns can keep up with all programs. The controller will allow the firing to lag behind the program as long as it doesn't get too far behind. Quote Link to comment Share on other sites More sharing options...
Tammyt Posted February 8 Author Report Share Posted February 8 It’s Cone Art 2327D Round GX. I have done three Cone 04 bisque slow and one Cone 6 glaze slow and one Cone 6 medium and each firing when longer than the book indicated. Quote Link to comment Share on other sites More sharing options...
Hulk Posted February 9 Report Share Posted February 9 Is it possible to deduce which ramp(s) went over on time? Data Menu -> Graph Past Firing Graphs from the last ten firings Compare the actual segment runtime to entered value. ...step out to the kiln, look at graphs...Brr! It's cold out there! ...up to 39°F If it is not clear which ramp(s) are at issue, then watching the graph during next firings should clear it up? Quote Link to comment Share on other sites More sharing options...
Min Posted February 9 Report Share Posted February 9 @Tammyt, I have one of those Cone Art 2327D kilns and I've never had it fire as quickly as it's scheduled. The more shelves/mass you have in it the more it slows down. Roberta12 1 Quote Link to comment Share on other sites More sharing options...
Tammyt Posted February 9 Author Report Share Posted February 9 So nothing to worry about as long as everything is turning out ok? Quote Link to comment Share on other sites More sharing options...
neilestrick Posted February 9 Report Share Posted February 9 ConeArt, L&L, and some other kilns all have multiple zones, where each section of the kiln is firing independently of the other. They typically fire a little slower than single zone kilns because they are working to keep the sections even in temperature. As long as the results are okay, it doesn't matter. And only the final ramp rate, the last 100C degrees or so, is really what affects how your glazes turn out. That is typically the slowest ramp rate in the firing, so it is most likely on schedule at that point. Min 1 Quote Link to comment Share on other sites More sharing options...
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