evenheat question

M

mdoyle

Joined
Feb 10, 2006
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Hey guys,
I received my evenheat oven today and I was wondering if there are any suggestions anyone can give me on setup that may not be included in the manual. Any tricks you picked up on? Any don't do this? Primarily heat treating carbon steels at first. I remember someone having trouble with their EH overshooting the selected temp but I am having trouble searching such a broad topic. Any suggestions would be appreciated.
Thank you,
Matt Doyle
 
I have a 18" deep Evenheat and mine will stay within a couple of degrees, up or down, of what I set it for. I'm satisfied with mine.
 
No secrets that I know of - I love mine.
When tempering, however, say at 350 degrees, it takes a while for it to stabilize. It might hit 390-395 and then cool off three or four times before it stays around 350. It'll do that at any low temp, which is understandable.
That thing will do anything you want it to!
 
when you are tempering you can dotwo things to keep from over shooting. First heat the the oven and let it stabilise before putting in your blades. Or just set your ramp speed to what ever temp you are tempering at. If you are tempering at 350 then set ramp rate to 350 degrees an hour. This works for me.
 
I'm with Bill. I've never gone over 450 for tempering, and simple ramping up at 450--or less--per hour solves the overshooting problem.

John
 
One of the most common causes of overshooting temperature is impatience. The oven was 1900 degrees. The blades are cool and you want to temper ASAP. As stated in the manual, this thing is NOT a refrigerator. With the door open, you may get it to cool below your intened tempering temperature, but that isn't enough. Close the door again and watch it climb as the retained heat in the bricks rewarms the chamber. You pretty much have to let it cool all the way before tempering. I've read here that the coils last longer if you cool it with the door closed.

Rob!
 
Thanks everybody for the helpful info. I'm sure this is the first place I will come if i have a problem.
Matt Doyle
 
Amen to what Rob said. Impatience in tempering is the only problem I have ever had with my Evenheat.
 
Keep in mind, if you have the dwell time (time to hold at temp) set to say, 1600F hold for 15min, be careful. What happens? The 15min clock only starts counting down whent he kiln is EXACTLY at 1600F. Example, i was soaking a part at 1600F, set for 15min.

After an hour i looked over and the kiln was still at approx. 1600F, cycling between like 1595 and 1605F. The dwell time clock still had 13min to go! Lesson? don't pay any attention to that dwell time.
 
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