Brad Anderson
Well-Known Member
Good thought Brad, but I measured the blade temp with an infrared thermometer after it had been at the plateau temp for 30 minutes. I used a 4 segment program for my test. I did use the fastest ramp setting (9999). Between each plateau temp I held for 30 min then ramped to the next.
So you are saying the oven ramped up and the temp display indicated the proper temp (say 950 degrees), then sat at that 950 for half an hour undisturbed (no peeking), and at the end of the half hour your blade was not at 950? If thats the case, either your infared temp gun is off, your thermocouple is defective, or the calibration software for the thermocouple in the controller is wrong. After half an hour at a steady temp, the oven and contents should pretty much be at equillibrium.
Go to the welding supply store and get a tempil-stik for 1500 degrees. It is like a temperature sensitive crayon. Mark a line on a piece of steel and set it in the oven. Ramp the oven in one segment from room temp to 1500 and let it soak for 1/2 hour. The line should leave a liquid smear on the steel if the oven got up to temp. The advantage of buying a tempilstick over the firing cone is that you get lots of uses from it for relatively little cost and can verify numerous blades get to temp. If that test doesnt work, I would be on the phone to Evenheat again to see what they are going to do to remedy the situation.
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