- OscarParticipantSeptember 3, 2016 at 7:33 amPost count: 3
Hey guys im building a mpcnc right now and im wondering, why do i need the 100ohm resistor and/or would it work with a 220 ohm one?
I’ve heard that you don’t need it if you are only planning to use it as a cnc router (which i am), and that you can just change something in the marlin firmware.vicious1KeymasterSeptember 3, 2016 at 7:36 amPost count: 2657
220 won’t work, pretty sure unless you change the thermistor value in the firmware. I think it would read too high of a temp.
The firmware change is easy, under thermister we have number 11, you just change it to a zero I believe and reflash it. There are actually notes in the firmware file. You might also need to disable temp checking in repetier if you do this.
OscarParticipantSeptember 3, 2016 at 7:39 amPost count: 3
- This reply was modified 1 month, 3 weeks ago by vicious1.
Thanks for the fast reply, i will test the firmware change. Better than buying a set of resistors.vicious1KeymasterSeptember 3, 2016 at 7:58 amPost count: 2657
Sorry for being lazy and not looking at the firmware, I was having my first cup of coffee.
You can change this line
#define TEMP_SENSOR_0 11
To either 0 (not used) or the new firmware has a 998 (always show 25C) 998 would be best!
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