About to try Marlin1.1.0RC4...

[lakester]

Follow-up: not sure if I should post this to a new thread...

First: Tried manual mesh leveling. It appears to be working. I wasn't 100% certain after the leveling operation whether I needed to save to EEPROM..., so I did (M500), just in case. G29 returns credible values and Z axis is moving as expected during prints. Forgot to mention..., I went ahead and added a M501 to the gcode startup section in the Slic3r config.

Second..., but: Printing from the SD card doesn't seem to work. I can see the files fine from the control panel, but when I select one to print, the display goes blank and the machine just sits there.

The following defines are set:

#define MOTHERBOARD BOARD_RUMBA
#define SDSUPPORT
#define REPRAP_DISCOUNT_SMART_CONTROLLER
#define EEPROM_SETTINGS

The card had been removed and inserted and messages indicating that activity appeared on the control panel as expected. The "Print from SD Card" menu item displayed the expected list of files. It was only when a file was selected that things hung up.

FWIW..., when the hang was encountered..., all heating was discontinued.