JGAurora A5 direct drive with dual extruder and single nozzle

thingiverse

Not done yet!!!:\r\n\r\n#with TMC2130 I get overheated with longer prints, maybe it's too heavy\r\n\r\nInspired by thing https://www.thingiverse.com/thing:1643906/, I want to take it to the A5.\r\nBasically, I use everything from the original plus a body made by me to fix it on the hotend.\r\n\r\nAdvantage:\r\nUse of the original Hotend\r\nUse of radial or 40x40 axial fan.\r\n\r\nDisadvantage:\r\nYou will lose build room Z to 250mm\r\n\r\nHow to:\r\n#Mechanic\r\nPrint the body file and install it on the hotend.\r\nPrint the parts mentioned in https://www.thingiverse.com/thing:1643906/ and assemble it. I prefer not to use the 50mm body and don't use the bracket part.\r\n\r\nCut down PTFE a few millimeters before the Bowden.\r\n(This part I will try to solve better with a modified body, so the bowden can be removed)\r\nPlace the new extruder and screw the extruder body to the hotend body.\r\n\r\n#Firmware:\r\n\r\nChanges to make:\r\nWe basically create a virtual second extruder, which is the same like default one, only with inverted movement. \r\n\r\n##pin_RAMPS.h\r\n\r\nSo the pins are the same like for E0:\r\n\r\ndefine E1_STEP_PIN E0_STEP_PIN\r\ndefine E1_DIR_PIN E0_DIR_PIN\r\ndefine E1_ENABLE_PIN E0_ENABLE_PIN\r\n\r\nand the temp sensor is the same, too:\r\n\r\ndefine TEMP_1_PIN TEMP_0_PIN // Analog Input\r\n\r\nChange the pin for the Servo\r\n\r\nifdef IS_RAMPS_13\r\n define SERVO0_PIN 7 // RAMPS_13 // Will conflict.....\r\n else\r\n define SERVO0_PIN 6 // was 11\r\nendif\r\n\r\ndefine SERVO1_PIN 11 // was 6\r\n\r\n##Configuration.h:\r\n\r\nWe set the amount of extruder to 2:\r\n\r\ndefine EXTRUDERS 2\r\n\r\nEnable the switch extruder part. This gives us the ability to change the Extruder with T0 and T1. Test the angles matching to your prints and set them too.\r\n\r\ndefine SWITCHING_EXTRUDER\r\n\r\nAssign Temp_Sensor_1 like the Temp_Sensor_0 to prevent errors.\r\n\r\ndefine TEMP_SENSOR_1 TEMP_SENSOR_0\r\n\r\nSet the line below to false\r\ndefine DISABLE_INACTIVE_EXTRUDER false\r\n\r\nSet the invert direction matching to you motors. The E1 has to be counter wise E0\r\n\r\ndefine INVERT_E0_DIR true\r\ndefine INVERT_E1_DIR false // counter wise E0\r\n\r\nAnd define the number of servos:\r\ndefine NUM_SERVOS 1\r\n\r\n\r\n#Usage:\r\nUntil now, I only use the default T0 and can print very nice.\r\nI need to improve how the filament goes into the hotend (like I said in the top). If the filament is very round from the spool, it can be happen that it not hits the hole. If I manually force it into, it is very nice.\r\n\r\nIf the problem is solved we can use the second filament:\r\n\r\nM203 E400 ;set maximum feedrate to 400 mm/min\r\nG4 S1 ; wait 1 s\r\nG92 E0 ; reset extruder position (set it to 0)\r\nG1 E-4 F120 ; retract 4mm\r\nG1 E-2.5 F60 ; go slowly back to 2.5mm (push slowly back 1.5mm)\r\nG1 E-39.5 F24000 ; retract fast to 39.5mm\r\nT1 ; switch to the second filament\r\nG1 E0 F1800 ; feed in the second filament\r\nM203 Exxx ;set maximum feedrate back to your default value xxx mm/min\r\n\r\n#To-Do:\r\n\r\n* general improvements for the airflow\r\n\r\n* I want to add a holder for the empty filament-sensor. The target is an automatic switch to the second extruder if the spool is empty. I will take care of it soon.\r\n