Hi
For my 3D Printer project i try to connect a 100k ohm thermistor to the analog input and have some problems with it.
My schematics is:
(+) ------100KohmThermistor-- |
|
(-) -------4,7KohmResistor--------|-------- Analog input Pokeys
Now i have add 4 DRO to my mach3 set:
1.The corrected value from pokeys analg input
2.The volt input that calculated from the first dro (A/1023*3.3)
3.The resistant that calculated from the second dro (4700*3,3/A-4700)
4.The Celsius value the calculated from the third dro (1/298.15+1/4267*Ln(A/100000) )
When i use this so he shows me the celsius value but it jumps between 1-1/12 celsius How can i stable it?
when i turn on my motorcontroller for my stepdrives then it jumps between 10 celsius.What must i shield to avoid this problem?
And for a finer resolution i need the three places behind the point.mach3 shows only in front of the point.Is it possible to show the corrected value with 3 places behind the point in mach3?
Or give it another solution for read temperatur from 50-300 celsius and map it to a mach3 dro? Maybe about Poblocks?
I would be happy about an idea for this problem.
Matthias