RAMPS thermistor table?

Which thermistor table do I use for this? 100K 1% 3950 NTC
Nominal value: R25 (25 ℃) : (common) 1.5K, 2K, 5K, 10K, 20K, 30K, 47K, 50K, 100K, 200K, 500K, etc
Resistance precision: ± 1%, ± 2%, ± 3%
B value R25/50 (common) 3435k, 3600k, 3950k, 3990k, 4100k, 4200k, etc
B value accuracy: ± 1%
Temperature range of use: - 40 ℃ ~ + 300 ℃
Dissipation power factor: ≥5 mW / ℃ (static in the air)
Biggest power rating: 45 mw
Hot time constant: ≤7 s(in the air)
Temperature coefficient of resistance: - 2 ~ 5% / ℃
Recommend the use of parameters: R25℃ = 100 k B25/50 = 3950 k ± 1%)

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I await Skynet and my last vision will be of a RepRap self replicating the robots that is destroying the human race.

I use 11 for this thermistor. Which isn't on the list in configuration.h in all marlin versions.

Edited 1 time(s). Last edit at 01/20/2016 08:31AM by DjDemonD.

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DjDemonD
I use 11 for this thermistor. Which isn't on the list in configuration.h in all marlin versions.

I use 11 as well but found that my heated bed now jumps 10f higher when it used to be pretty steady. I suppose I will have to manually play with D and P but just odd that a real Epcos 3950 didn't have this issue.

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I await Skynet and my last vision will be of a RepRap self replicating the robots that is destroying the human race.

I'm sure many copied thermistors are not very accurate, it's a shame there isn't a thermistor autocalibrating function but I suppose in order to do this you need a really accurate way of measuring the temperature and it seems a thermistor is far from that.

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DjDemonD
I'm sure many copied thermistors are not very accurate, it's a shame there isn't a thermistor autocalibrating function but I suppose in order to do this you need a really accurate way of measuring the temperature and it seems a thermistor is far from that.

Supposedly the 32bit controllers do NOT use tables they auto adjust based on the values I posted above. Too bad RAMPS doesn't have that but this 5-10c over shoot is very bad and I have to do something to calm that down.

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I await Skynet and my last vision will be of a RepRap self replicating the robots that is destroying the human race.

Is it still off after pid autotune?

Yes, it was. I haven't done any printing since but I have manually upped D and lowered P because the overshoot I do believe caused my PLA to warp in two opposite corners ever so slightly. 55c for bed temp overshooting to 65c then falling down then overshooting ad nauseum would make anything warp.

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I await Skynet and my last vision will be of a RepRap self replicating the robots that is destroying the human race.