Fiona B

No, definitely right cones. Haven't glazed as yet, this weekend. I’m just waiting on opening another glaze fire with pre-glazed pieces from before element change. I’ve changed the controller and schedule right now to get some more information, so we’ll see. I’ll do another bisque soon and look at that schedule. It’s the lower bisque that is throwing me but hopefully the bisque done will take the glaze okay, they look and feel no different than usual, perhaps more dusty. We’ll see if they act differently. Still perplexed! thanks for the input.

Sorry Neil. I replied to you last night but it doesn't seem to have posted. I cannot find any decent info online ass to a number or type ('k' or whatever). I can only find a spare parts (https://www.rohde.eu/media/pdf/c8/f5/cf/2020-Preisliste-KH-Ersatzteile_EN-web.pdf - page 9). My bisque is: Celcius: 50ph 100 83ph 600 133ph 800 72ph 980, 20 min hold Glaze fire: 90ph 300 115ph 1060 100ph 1220, 20 min hold. Someone elsewhere mentioned relays, it seems to be switching it on and off okay and time for firings are okay. Still a bit stumped. I have just borrowed a controller and put on another glaze firing to see if i can gain any more info... Thanks for your reply, Fiona

Hi, thought I would see if the hive mind can point me in the right direction. I have an electric Rohde 43l kiln with standard controller fyi but I think the issues I'm having are with universal parts. I recently changed all the elements, which went smoothly and they all work, light and heat up. So far so good. The issue I have now is using the exact same bisque and glaze fire pre-programmes, the cones (I use witness cones) in my firings which standardly were a solid cone 04 for bisque and cone 7 for glaze before my element change are now different. My glaze firing is producing a hot cone 8 (Cone 9 just starting to bend). I can appreciate that potentially the elements being new may need some adjustment, so I did that and dropped both the top temp and the hold down for less heatwork. This changed nothing with the cones, it was still a hot cone 8. The bisque has me more confused. I presumed that would be over, however, with the same Cone 04 programme, and cones 05,04,03 in the kiln, none of the cones bent at all, indicating a lower than cone 05 temperature. All the bisque pieces looked fine and obviously cooked enough that I am happy to continue and glaze. I need to work out what is happening. I am fairly sure it is not the thermocouple. Rohde kilns have good ones and I spoke to the UK main Rohde supplier who said in his 25 years he had only needed to replace 6 thermocouples. Not very familiar with relays? Anybody any thoughts it would be much appreciated. Thanks Fiona