On Thu, 29 Apr 2021, Curtis Dutton wrote:
Date: Thu, 29 Apr 2021 12:01:56 -0400
From: Curtis Dutton <curtd...@gmail.com>
Reply-To: "Enhanced Machine Controller (EMC)"
<emc-users@lists.sourceforge.net>
To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net>
Subject: [Emc-users] Best Mesa Thermistor Reading Combo
I'm upgrading the old spindle motor for my Fadal VMC 15 rebuild project. I
found a new old stock 11 KW 10000RPM Fadal spindle motor that I'll be
installing in it's stead. A06B-1446-B100#0102.
It has an MZi encoder and a thermistor in the motor. I would like to
integrate temperature monitoring. I'm using all mesa hardware.
Does anyone have a good recommendation as to a nice clean "DIN" mountable
way to interface the thermistor to my control? The manual says 30 to 90
KOhm at 20 to 30 deg Celsiuis.
I don't know if they increase resistance with temp or decrease. Hopefully
someone out there has some fanuc motor experience.
Thanks,
Curt
If its a normal NTC thermistor, its resistance will go down with increasing
temperature. If you have 7I76,7I76E,7I77 or 7I84 in the system, you could read
the thermistor by using one of the analog inputs:
+24V --> Thermistor.T1 --> Thermistor.T2 --> 7IXX analog input
The resistance vs temperature is quite nonlinear so you would probably need to
feed the analog value to lincurve to linearize the temperature readout
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Peter Wallace
Mesa Electronics
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