Marlin 1.1.0-RC5 Odd Behavior on second hot end
I set up an Itty Bitty Double Flex extruder today. The first hot end works just fine. When ever I try to print with the second hot end things are very screwy.
Problem #1:
I'm using ABL (G28 followed by G29) and trying to print with only my second hot end, T1. In this case when Marlin gets to the first move command (G1) the printer tries to move the hot end off the bed. The G29 leaves the hot end in the printer's far left corner. Then when the first move happens the hot end *should* move back into the center of the bed but instead it tries to run right off far left corner. It seems to me like we are in relative positioning mode when we should be in absolute positioning mode. If I run the same print with hot end 1 (T0) this problem does not happen. If I remove the G29 from my startup script then this problem does not happen.
Gcode:
G90
M82
M106 S0
M140 S0
M104 S0 T0
M104 S205 T1
M109 S205 T1
G28 ; home all axes
G29 ; Abl Routine
G92 E0
G1 E-1.0000 F1800
G1 Z0.345 F120
; layer 1, Z = 0.345
T1
; tool H0.345 W0.576
; skirt
G1 X102.047 Y105.629 F3600
Problem #2:
I'm trying to print with only my second hot end, T1, just like above. But this time no ABL because it causes problem #1. Now the print starts normally and appears to be working fine until the end of layer 1. When attempting to raise the z-axis to print layer 2 the z-axis actually LOWERS itself and causes a head crash :(. No clue what is going on here. If I use hot end 1 (T0) this problem does not happen.
Gcode:
G90
M82
M106 S0
M140 S0
M104 S0 T0
M104 S205 T1
M109 S205 T1
G28 ; home all axes
; G29 ; Abl Routine
G92 E0
G1 E-1.0000 F1800
G1 Z0.345 F120
; layer 1, Z = 0.345
T1
; tool H0.345 W0.576
; skirt
G1 X102.047 Y105.629 F3600
....
G1 X143.820 Y143.578 E28.1793
G92 E0
G1 E-1.0000 F1800
; layer 2, Z = 0.645
; tool H0.300 W0.480
; inner perimeter
G1 X144.550 Y144.550 F3600
G1 Z0.645 F120
...
Does anyone have a clue what is wrong here? Thanks for looking.
