PID Heater Control

Started by rickman in sci.electronics.design7 years ago 47 replies
PID

If a heater is controlled by turning it on and off, does a PID algorithm help in more closely controlling the temperature? Will running the...

If a heater is controlled by turning it on and off, does a PID algorithm help in more closely controlling the temperature? Will running the PID loop faster than the temperature measurement improve anything? How would a PID control be an improvement over a simple temperature comparison with or without an anticipator? -- Rick


Fincor PID dancer schematic or Manual needed

Started by M Philbrook in sci.electronics.design4 years ago 3 replies

I know many of your old farts here have a collection of schematics or at least manuals.... I can not find the manual or maybe even the...

I know many of your old farts here have a collection of schematics or at least manuals.... I can not find the manual or maybe even the schematic that sometimes comes with these manuals for a : Fincor 105456401 , 1900-77 This is a PID dancer controller with a tach following option. If need be I can reverse engineer one using TinyCad or some common free electronic ...


PID Controller Design for Ventilator

Started by Ricketty C in sci.electronics.design2 years ago 109 replies

I understand the basics of PID design, but if you can't describe the thing being controlled, how can you design the controller other than trial...

I understand the basics of PID design, but if you can't describe the thing being controlled, how can you design the controller other than trial and error? The "plant" is a motor on a tall reducing gear (~300:1) turning an arm that presses on a bag producing an air flow with the loop controlled by a pressure measurement. One issue I'm seeing discussed is a tradeoff on the


I don't understand thermostats

Started by John Larkin in sci.electronics.design7 years ago 51 replies
PID

Imagine a mass that we want to heat with some closed-loop controller. It's C2 below. Voltage represents temperature. Thermal systems...

Imagine a mass that we want to heat with some closed-loop controller. It's C2 below. Voltage represents temperature. Thermal systems are diffusive, which we represent as a bunch of RC lags. Assume the voltage at C4 is the temperature sensor. If I were to design a PID controller, I'd have to really think about it, or fiddle some, to keep it stable. But if I do a dumb on/off thermostat, ...


Tuning PDF loop (pseudo derivative feedback)

Started by Anonymous in sci.electronics.design9 years ago 42 replies
PID

I know about the auto-tuning algorithm for PID: cycle the temperature up an= d down, measure the peaks and distance between the peaks, and...

I know about the auto-tuning algorithm for PID: cycle the temperature up an= d down, measure the peaks and distance between the peaks, and calculate Kp,= Ki, and Kd. =20 But recently I've been experimenting with what Phelan called PDF, and am in= trigued by it. There isn't a lot of information out there about it, but ne= arly everyone that's used it has good things to say. =20 The prob...


Tom Frederiksen, RIP

Started by Jim Thompson in sci.electronics.design5 years ago 36 replies
PID

I just found out... Tom Frederiksen, RIP... Tom and I shared a cubicle at Motorola Semiconductor Products Division during the early to...

I just found out... Tom Frederiksen, RIP... Tom and I shared a cubicle at Motorola Semiconductor Products Division during the early to mid-60's. ...Jim Thompson -- | James E.Thompson | mens | | Analog Innovations


measuring nanoamps with lots of noise

Started by Anonymous in sci.electronics.design7 years ago 30 replies

I am having a difficult problem on a current project so I was wondering if anyone could help. This is a project where I have to measure current...

I am having a difficult problem on a current project so I was wondering if anyone could help. This is a project where I have to measure current generated by a sample at high temperature inside a furnace. The current is in the picoamp-nanoamp range depending on temperature and I have been using a Keithley picoammeter. The furnace is controlled by a PID temp controller connected to


Hot air soldering station recommendation

Started by Klaus Kragelund in sci.electronics.design3 years ago 9 replies

Hi I am trying to get my lab up to speed, so now I need a hot air soldering station Seen this...

Hi I am trying to get my lab up to speed, so now I need a hot air soldering station Seen this one: https://m.aliexpress.com/item/33034086674.html?pid=808_0000_0131&spm=a2g0n.search-amp.list.33034 086674&aff_trace_key=&aff_platform=msite&m_page_id=822amp-QKibdmRAN4hCllCLcM0CAA1580243088270&br owser_id=b1e4e133b2d5400298ff0d819e9ba525&is_c=Y&gclid=null Cheap, but any good? Other recomme


Adapting a Garmin Traffic Receiver to car antenna?

Started by DaveC in sci.electronics.design13 years ago 33 replies

Garmin makes an "integrated" FM traffic info receiver for some models of GPS that allows connection to the car's AM/FM antenna. But not my model...

Garmin makes an "integrated" FM traffic info receiver for some models of GPS that allows connection to the car's AM/FM antenna. But not my model (Nuvi 660); I must use only the GTM20, a cigarette-lighter-powered model: Benefits of using the car's antenna are mostly stealth: the cord-that-is-the-antenna between the cigarette lighter (which w