Duet SD-Image Question

I am trying to getmy Duet 0.8.5 setup to use with my printer. I have downloaded and installed the latest firmware from DC42, but I don't exactly know what to do about the SD-image folder. What sys folder should I use as a base for a Prusa i3?

Thanks!

I suggest you start from the Ormerod 2 sys folder. You will need to change the config.g and homing files there to account for your machine having a Y endstop switch, whereas the Ormerod uses the proximity sensor for X homing. See [reprap.org] for details.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

You are awesome! Thank you!

After a bit of reading and poking around I have got all the .g files setup correctly, but I am having difficulty with temperature readings. I have the 4700 resistors and made the necessary changes in the config file, but I get a negative reading on the bed. When I use M105 it returns: ok T:21.4 B:-21.3

Seems it is reporting the exact negative value for the bed. Any ideas? I have a multimeter coming tomorrow, and I will be able to test the thermistor when I get home, but I am pretty sure it is functioning.

The Ormerod uses a 10K thermistor for the heat bed and you probably have 100K. Add parameter R100000 to the M305 P0 command.

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

I tried the R100000 with no luck. The temperature said 68.9 but that is far too hot for the room temperature which is closer to 22.2

The resistor (thermistor) measures 102k ohms.

What I have in the config.g currently is:

;*** If you have a Duet board with 4.7K thermistor series resistors, change R1000 to R4700 to the following M305 commands
M305 P0 R4700 H0 L0			   ; Put your own H and/or L values here to set the bed thermistor ADC correction

Edited 1 time(s). Last edit at 01/19/2016 08:16PM by Pole04.

It looks like you are missing the T and B parameters

M305 P0 T100000 R4700 B4200 H0 L0

T should be 100K not R, R should match the n board resistors 1000 or 4700 (assuming 100K thermistor)
B should be the beta value for the type of thermistor used

Quote
Pole04
I tried the R100000 with no luck. The temperature said 68.9 but that is far too hot for the room temperature which is closer to 22.2

The resistor (thermistor) measures 102k ohms.

What I have in the config.g currently is:

;*** If you have a Duet board with 4.7K thermistor series resistors, change R1000 to R4700 to the following M305 commands
M305 P0 R4700 H0 L0			   ; Put your own H and/or L values here to set the bed thermistor ADC correction

That worked perfectly! Thank you!