@daxzero

You can try this Geneva Indexing Table Mechanism.
Just use a stepper motor.

https://www.youtube.com/watch?v=8tchOhvDgQM
https://www.youtube.com/watch?v=lPA9_cqAC-w

@dc42 , I think The most useful things is :

1. The conditional block may consist "AND / OR" expression so we can combine two or more logic expression.

2. SELECT CASE Function as alternative conditional block after IF-ELIF

3. Attach "LABEL" name Function in any certain line and "JUMP TO LABEL / GOTO LABEL" Function so we can jump or loop to any line we desire. I think this is more flexible than "While" or other Loop function.

4. "WAIT" Function for any input signal or variable is triggered/changed, and make decision with conditional expression based on change of that input signal (Like wait for button is pressed)

5. Any variable / command to manipulate "Counter and Timer" Function.

@veti Parameter R4700 for PT100 is automatically generated by RRF Configurator, it is default mode. I just selected sensor channel like picture below.

I have Heatbed Heater with a Thermistor in Heater 0 (P0 Parameter) and Extruder Heater with 2 wires PT100 Temperature Sensor (with Duet PT100 Daughter Board) in Heater 1 (P1 Parameter).

Actually I have problem in PT100 Temperature Reading, I use 100 Ohm Test Resistor to check reading in 0 Celcius. But Heater 1 temperature reading always show in 2000 Celcius.

I checked in Config.g File and make several trial configuration :

1. Enable both H0 and H1

I turned off Duet and restart, Actual reading is

2. Disable H0 and Enable H1

I turned off Duet and restart, Actual Reading is

3. Disable H0 and Enable H1, but without write "R4700" in H1

I turned off Duet and restart, Actual reading is

4. Enable H0 without "R4700" and Enable H1 without "R4700"

I turned off Duet and restart, Actual Reading is CORRECT

It seems H1 will be problem if "R4700" is written, but in H0 has no problem if "R4700" is written (when both is enabled).

Can you explain why "R4700" parameter in H1 setting make H1 reading is incorrect?
May I run the printer without "R4700" written in configuration file ?

Can you give me some guide for set up the fan outputs in RRF3?
Actually I have already using a SSR for drive the Bed Heater, I'm not intend to switch bed heater output to extruder heater output.

I think I need 1 external mosfet more to drive 8th extruder heater as you suggested.

If I want to use 8 Extruder, I can use 2 Stepper Drivers on Duet2 Wifi + 5 Stepper drivers on Duex 5 + 1 Stepper Driver from CONN_LCD pin on Duex 5 = 8 Stepper Drivers.

And I can use 4 pcs PT100 Daughter Boards that have 8 total input pin PT100 temperature sensor.

But, for Extruder Heater Output Pin I only found 2 pins on Duet 2 Wifi + 5 pins on Duex 5 = 7 output pins.

I need 1 Extruder Heater output pin more so I can use total 8 Extruders.

Is there any 8th Extruder Heater pin on Duet2 Wifi/Duex 5 that I can use?