I have a 12" 120v top load used kiln, brand name is Crucible from Seattle Pottery. It is having some trouble keeping up with the kiln schedule, I just wanted to ask if this is pretty normal for these little guys or if new elements etc. might improve things. I set it on full power and checked the elements and they are all glowing, no dark spots.
It has a Bartlett controller and I run the following program-
150/hr to 220
400/hr to 1978
100/hr to 2210 hold 10 mins
Ambient temp is in the 70's
From around 1700 degrees it starts slowing and only rises 200/hr at the end of the 400/hr ramp. With the 100/hr ramp it goes as slow as 30 degrees an hour towards the end. It also has trouble holding at 2210 and usually drops below 2200 during the hold and doesn't make it all the way back up to 2210.
I also tried firing up to 2232 but it gave an error E-1, which the manual says it couldn't increase temp faster than the minimum.
It still gets the job done just fine, but just curious if this is somewhat normal for the tiny kilns. Thanks!