After I posted my original question I went into the Repetier firmware (the .83 version modified by SeeMeCNC). There is quite a narrative about the "Anti Ooze" menu item in the Configuration.h file.
Earlier I was updating my firmware (from .81 I think) so I could load files to the SD card independent of the Rostock MAX. When I ran a test print I discovered that my regular method of priming the extruder did not work well. The new settings in the Configuration.h file limit the preheat temperature of the extruder to 230°. Oops!
I normally run my first layer at 240°. When printing from the SD card I have tended to manually set the bed to preheat to 80° and the extruder to 240°. Once both make it to temperature, I extrude about 25mm of filament and then immediately start the print file. By doing that the extruder is fully primed and there is no "gap" in the first part of the first layer.
I'll go back into Configuration.h and change the appropriate line of code; I haven't looked but I don't think it is in the EEPROM configuration file in Repetier Host.
Code: Select all
// ###############################################################################
// ## Values for menu settings ##
// ###############################################################################
// Values used for preheat
#define UI_SET_PRESET_HEATED_BED_TEMP_PLA 60
#define UI_SET_PRESET_EXTRUDER_TEMP_PLA 150
#define UI_SET_PRESET_HEATED_BED_TEMP_ABS 90
#define UI_SET_PRESET_EXTRUDER_TEMP_ABS 175
// Extreme values
#define UI_SET_MIN_HEATED_BED_TEMP 50
#define UI_SET_MAX_HEATED_BED_TEMP 100
#define UI_SET_MIN_EXTRUDER_TEMP 60
#define UI_SET_MAX_EXTRUDER_TEMP 230
#define UI_SET_EXTRUDER_FEEDRATE 2 // mm/sec
#define UI_SET_EXTRUDER_RETRACT_DISTANCE 3 // mm
As is indicated above, the LCD Smart Controller "ain't independently smart."
Bill
or 
). One of the options is found at Configuration -> Anti Ooze.
