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The Range
Ammo & Reloading
PID temp controller for Lee lead pot
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<blockquote data-quote="ok-22shooter" data-source="post: 4152300" data-attributes="member: 42477"><p>While the controller has the ability to calculate PID output (ie: 0 to 100% output), the actual output to the relay is on/off 120VAC going to the heater. In theory, it could pulse the output varying from always on to only on maybe 10% of the time. 100% on does not give much ability to slide up to the temp. If there was a way to vary the amount of current, it would make sense to tune the output. I set the temp to 5 to 10 degrees C under the temp I expect to cast at. Also 20 lbs of lead will not be the same temp when part is still solid. It takes about 30 minutes or so to get everything stabilized. In the past, I had a big pot of lead on a propane burner and would refill the Lee pot when it got to 1/2 empty. My propane burner is at my buddies with the 400 lbs of lead. I have a 6 cavity 38 spec mold coming in and now that we are in fall and cooler temps, I will move my equipment over there and hope to cast a thousand or so 38s and 40s.</p></blockquote><p></p>
[QUOTE="ok-22shooter, post: 4152300, member: 42477"] While the controller has the ability to calculate PID output (ie: 0 to 100% output), the actual output to the relay is on/off 120VAC going to the heater. In theory, it could pulse the output varying from always on to only on maybe 10% of the time. 100% on does not give much ability to slide up to the temp. If there was a way to vary the amount of current, it would make sense to tune the output. I set the temp to 5 to 10 degrees C under the temp I expect to cast at. Also 20 lbs of lead will not be the same temp when part is still solid. It takes about 30 minutes or so to get everything stabilized. In the past, I had a big pot of lead on a propane burner and would refill the Lee pot when it got to 1/2 empty. My propane burner is at my buddies with the 400 lbs of lead. I have a 6 cavity 38 spec mold coming in and now that we are in fall and cooler temps, I will move my equipment over there and hope to cast a thousand or so 38s and 40s. [/QUOTE]
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PID temp controller for Lee lead pot
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