I use a standard stepper motor board for my extruder after blowing up my A3949. You just need to change the extruder::sStep() function in the extruder.h file in the motherboard firmware to ouput a standard pulse rather than a level change. My code is shown below. #define STD_STPR_DRV_EXTRUDER // use a normal stepper inline void extruder::sStep() { //buildCommand(STEP); //talker.sendPacby brokentoaster - United Kingdom RepRap User Group
This is still happening in the current host software (July 2010). In the previously posted files the first error is at layer 3. The gcode does not do the shield as per normal Quote;#!LAYER: 3/50 G4 P6 ;delay M107 ;cooler off G4 P20 ;delay G1 F5.0; feed for start of next move G1 Z0.45 F30.4 ;z move G1 Z0.6 F5.0 ;z move G1 F1500.0; feed for start of next move G1 X1.0 Y0.5 F2209.5 ;horizontal movby brokentoaster - General