Lets start w/ the basics: How are your reading the temp? Using an infrared heat gun? Or off the heat indicator on the control panel?
Also, did you contact Lawson support & discuss this problem w/ them?
Is this a new or used dryer?

 

may be trouble in cooling system? Can you check it?

 

The Dryer was a year old in April. I testing the temp. with an Atkins Digital Thermometer. I've spoken to Lawson in St. Louis several times. Still No help. I've changed the belt speed several times. Changed settings of the front and rear gates, Increwsed size of wire to unit to a #6-3 w/ground, changed the circuit breaker in the main electric panel to a 50 amp breaker still having problems. I don't know if any cooling temps have been checked because I don't know how to check that. I have changed the damper settings to the exhaust tho.

 

We know that circulation of air in the oven could be a problem.

So do you have an open window or open door or fan or air conditionning that change the circulation of air in your oven? and also with your exhaust: you have like a trap to avoid the wind to come back in your oven?

 

Nope, No fans, open doors, no AC on at the time. Exhaust pipe is like a stove pipe damper. the exhaust is now disconnected from any pipe, but it was only going to attic area above the drop ceilling. Not even outside. I have tried it both ways. Man I'm running out of options, aren't I?

 

What is the actual length of your oven area? Also, at what point in the oven (half way, 3/4 way, etc) does the shirt hit 320, and then 380? Is it consistent, does each shirt read the same way? Do you have a forced air setting on your dryer, and if so, it it turned on? Are you sure you're getting proper voltage coming into your bldg, and it's not fluctuating?

 

The dryer is about 7 ft. long Shirts should reach about 250 deg. halfway through. just before they exit the dryer they should be approx. 320 deg. they are in the dryer for about. 45 sec. to 1 min. The dryer has an on/off switch for its jet air, no other setting. The only thing I haven't been able to check is the voltages coming into the building. However I have already spoken to the local electric Co. Our shop is approx 6500 sq. ft. I have had no other problems with lights flickering or getting brighter or other appliances doing the same. etc.

 

The dryer is about 7 ft. long Shirts should reach about 250 deg. halfway through. just before they exit the dryer they should be approx. 320 deg. they are in the dryer for about. 45 sec. to 1 min. The dryer has an on/off switch for its jet air, no other setting. The only thing I haven't been able to check is the voltages coming into the building. However I have already spoken to the local electric Co. Our shop is approx 6500 sq. ft. I have had no other problems with lights flickering or getting brighter or other appliances doing the same. etc.

 

If I understand your problem correctly, the shirts come out at the proper temp sometimes, and at a higher temp sometimes, this all occurring during the same run? Is this dryer new, or purchased used? Have you had this problem since you had the dryer, or how long ago did it begin?
One problem could be something is causing your heat panels to cycle incorrectly. They don't stay on all the time, they cycle on & off depending on the inside temp of your oven, so possibility the temp sensor, or the device that actually cycles the voltage to the heat panels could be suspect.
Another thing that would cause this would be air entering the oven from the front & rear opening, like a strong breeze. Our dryer was located in a warehouse w/ roll up doors, and on very windy days we had to keep the doors half way down, to keep the wind from blowing into the oven, and causing the dryer to overheat trying to keep the temp constant.

 

Fred. Do you mean setting the ceramic end of the thermostat at an angle as it goes through the dryer?
Brian. Thanks for the info. However the unit is in a room that is very temperature controlled. Never an issue with drastic temp changes in the building.

 

I have a encore, and I know that the elements cycle on and off.
Meaning they don't increase in intensity to go hotter. They're just on longer.

Just like if you turn down the oven. It doesn't decrease the intensity of the IR element, it just slows down the cycle of how often it turns on.
Stupid I know.

All I do is make sure my gates are low, and that the curing temp is FOR SURE being reached.

Once my dryer heats up it never falters in temperature.... though. There may be an issue with elements.

Oh and I wait like a good half hour for it to warm up. Before I throw anything down it.

Good luck!