Slowee ramp up time after moving

aryan6380
Posts: 46
Joined: Thu Sep 03, 2015 8:42 pm
My Location: United States

Re: Slowee ramp up time after moving

Post by aryan6380 » Sat Nov 02, 2019 12:32 pm

I ordered new elements. Will know if this solves some of what I feel are heat related problems.

Original numbers were around 3000 watts each at 220v. What's in there now, using resistance to figure out the watts is only about 1800 watts each at 208v. Major difference. The new ones will be 2800 at 208v.

Thank you
Andrew

ed1966ss
Posts: 1425
Joined: Tue Aug 03, 2010 6:52 pm
My Location:
Location: Cincinnati Ohio

Re: Slowee ramp up time after moving

Post by ed1966ss » Sat Nov 02, 2019 2:42 pm

New elements with a wattage rated at 208V could certainly make a difference, but for future calculations or comparisons you need to use 240V for single phase calculations. It doesn't seem like much of a difference but in reality it is. You might want to double check the numbers for a valid comparison.

For example if an element is labeled 3000 Watt at 240 volts the calculated resistance is 19.2 (240*240/3000). But if you use 220V for the calculation that would drop the wattage to 2520 Watts (208X208/19.2) much less than reality.

Very simply elements will lose about 25% output wattage when dropping voltage from 240v to 208v.

aryan6380
Posts: 46
Joined: Thu Sep 03, 2015 8:42 pm
My Location: United States

Re: Slowee ramp up time after moving

Post by aryan6380 » Sat Nov 02, 2019 6:18 pm

Ed thank you for your time and patience. So the new elements are rated 3800 @ 240 and 2800 @ 208.

aryan6380
Posts: 46
Joined: Thu Sep 03, 2015 8:42 pm
My Location: United States

Re: Slowee ramp up time after moving

Post by aryan6380 » Tue Nov 05, 2019 6:26 pm

Results: figure I would post because it may end up helping someone.

Old element resistance was actually 21.1 New elements came in at 14.4

Time to temperature was 2:15pm @ 70F and 2:35pm @ 406F

Filled oven with 2 sets of harley wheels and a bunch of harley parts for burn out. In at 2:40pm.
3:11pm oven at 405F
3:17pm oven at 425F


The elements made a world of a difference
21.1 was 2000 approximately
14.4 is 3000 approximately

Getting ready to shoot some parts and see what changes with the higher heat value and the reduced dwell

Thank you
Andrew Ryan

Post Reply