Hotend Not Heating

[Albert Latham]

Hi all,

State of my efforts: I am setting up a Rapman 3.2 to run with the R2C2 control board. Thus far I have managed to get control of the Rapman with the controller. Currently I can home and jog all axes.

Issue: I have attempted to get the hotend to heat by sending the "Set" command from Pronterface. The command is successfully sent, but the hotend remains cold.

Other issues: The thermistor does not report temperatures correctly. I have been unable to figure out how to configure the thermistor from either config.txt or any other means. As far as I can tell there is no documentation.

Toolchain:
64 bit Ubuntu 12.04 LTS
Printrun/Pronterface (latest from github)
R2C2 Board V1.1
Rapman 3.2

What I have tried:
1) looking for some config.txt setting that might interfere.
2) testing voltages on the board when the command is sent. Results: 0V across pins 3 and 4 of CTC#1.
3) checked resistance values of both the heating resistor (5 ohms) and the thermistor (hovering around 110k ohm).

What am I missing? What else can I try? What else do you need to know?

Thanks you for your time,

Albert