Where is the MCU located

Steppenleguan

I assume MCU is short for motor control unit?
I think i have a problem with the calibration, but the Temperature showed 108 C on the Web Interface. I saw a post online saying, that the limit was 85 C so I halted the system. I have a thermostate on hand so I can check the real temperature of the components. But i need to find out where the MCU is located on the DUET 2 WIFI. Thx

bot

The MCU is the main chip that handles nearly all functionality. It's like a whole computer on a chip.

It's the biggest chip on the board I think. It's angled slightly, iirc, on most of the boards. (Edit: it's only angled on the older boards, but it's the biggest most obvious chip on all the boards.)

Steppenleguan

@bot ah , so the ATMEL ARM XYZ Chip. Thx! So thats truely a calibration problem. The measured temp is 27 C. I was wondering alreadz as there is neither a print nor eny steppers running.

Luke'sLaboratory

@steppenleguan said in Where is the MCU located:

the components. But i need to find out where the MCU is located on the DUET 2 WIFI. Thx

I'm fond of Microcontroller Unit/Microprocessor Control Unit for MCU, and its most often referring to the central chip that does all of the hard thinking, the ATSAM4E8E.

The drivers (TMC2660) are rated to warn at 100C and shut down at 150C. I wouldn't worry about em unless you're in a super warm environment (are they in the chamber?)

engikeneer

@steppenleguan if you want to better calibrate the MCU temperature sensor, you can use this guide:
https://duet3d.dozuki.com/Wiki/Calibrating_the_CPU_temperature

Steppenleguan

@luke-slaboratory yes the whole electronics are placed in a box. But it has the PCU fan AND 2 80mm EWM Pabst fans that are permanently running.

Luke'sLaboratory

@steppenleguan

Yeah I meant in the print chamber, not a seperate electronics box. With active airflow i doubt you'll get anywhere near, just calibrate the sensor and i wouldn't worry about it again.

Steppenleguan

@engikeneer as I said, I calibrated it this morning. The Temp showed neg. 59 Deg. so I had to change the value by 80,5 but thats too much I assume!

zapta

...Would be nice to add a sensor somewhere...

On a second thought, even the ability to connect external temp sensors (I2C?) and monitor them in the Web interface would be useful. For example, I can stick one to the MCU and another to the PCB near the hottest or typical driver.