Wiper Start GCode Issues

interwebsdesigner

I am trying to set up a wiper for my Dbot. I have gone through it all a couple times manually and through the macro. Problem is when it comes to print it isn't setting the first layer height, once stopped I can't adjust z like it is locked. Needed a reboot. I am not sure if it is the relative/absolute or what the issue could be. Anyone have any thoughts? Original start code and new start code with wiper below. Thanks!

Original

[[language]]
G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G29 S1 ;load mesh
G1 Z15.0 F9000 ;move the platform down 15mm
G92 E0 ;zero the extruded length

WIth Wiper

[[language]]
G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
G28 X0 Y0 ;move X/Y to min endstops

M208 X320	 			;Set Max X for wiper
M208 Z-10 S1   			;Set Depth for wiper

G91						;Set Relative Mode
G1 Z10					;Move bed out of the way 

G90			 			;Absolute Mode
G1 X312 Y162 F3000 		;Move X & Y Into Position
G91 					;Relative Mode
G1 E3 F1				;Extrude / Prime Filament
G1 E-3 F3				;Retract/Clean Filament
G90						;Absolute
G1 Z-2.70 F3000 		;Move Nozzle to Wiper

G91 			 		;Relative Mode
G1 Y-3 X2 				;Wiping
G1 Y-3 X-2
G1 Y-3 X2
G1 Y-3 X-2
G1 Y-3 X2
G1 Y-3 X-2
G1 Y-3 X2
G1 Y-3 X-2
G1 Y3 X2 
G1 Y3 X-2
G1 Y3 X2
G1 Y3 X-2
G1 Y3 X2
G1 Y3 X-2
G1 Y3 X2
G1 Y3 X-2

G90						;Absolute Mode
G1 Z15
M208 X300	 		;ReSet Max X for wiper
M208 Z0   			;ReSet Depth for wiper

G28 Z0 ;move Z to min endstops
G29 S1 ;load mesh
G1 Z15.0 F9000 ;move the platform down 15mm
G92 E0 ;zero the extruded length

dc42

1. The problem is this line:

M208 Z0 ;ReSet Depth for wiper

I think you meant to include S1 in that line.

2. Instead of resetting the axis dimensions using M208 commands, you could use ~~M562~~ M564 S0 to disable axis limits, then ~~M562~~ M564 S1 to re-enable them afterwards.

3. In this sequence:

G91 ;Relative Mode
G1 E3 F1 ;Extrude / Prime Filament
G1 E-3 F3 ;Retract/Clean Filament
G90 ;Absolute

the G91/G90 will have no effect on extrusion. Use M83/M82 instead.

interwebsdesigner

Great. I am going to try that. Which setting is it in when it prints,, guessing the extruder is in relative mode? Also, what about printing, does it print in relative or absolute? Thanks!

interwebsdesigner

Also, is M562: Reset temperature fault?

dc42

I'm sorry, I meant M564.

dc42

Whether you print in absolute or relative extrusion mode depends on how you configure your slicer. You have M82 in your start gcode, so I presume you slice in absolute mode.