Cura & RRF Power Supply (M80)

CNCModeller

Hi All,
I've now got power supply management working and wanted to have the gcode turn on the power before a print begins. However if I put M80 in Cura's "Machine Settings", "Start G-code" the generated code try's to set heater temps etc before turning on the PSU, i.e. there is code in the print file before the M80 command.

Any thoughts on how I sort this? Is there somewhere else in Cura to put pre-printing commands?

Any constructive thoughts would be much approciated.
Cheers
Barry M

droftarts

@cncmodeller Can you post the Cura 'start G-code' you are using, and the start of the Gcode file it generates?

Ian

gloomyandy

@cncmodeller Perhaps you could place your M80 in a start.g file, I think that gets run before any of the gcode in the file being printed....

CNCModeller

@gloomyandy , that's a good idea I'll give it a go, thanks

CNCModeller

@droftarts said in Cura & RRF Power Supply (M80):

@cncmodeller Can you post the Cura 'start G-code' you are using, and the start of the Gcode file it generates?

Ian

Start GCode

G80
G28 ;Home
G1 Z15.0 F6000 ;Move the platform down 15mm
;Prime the extruder
G92 E0
G1 F200 E3
G92 E0

Cura Generated file

;FLAVOR:RepRap
;TIME:14160
;Filament used: 17.4632m, 0m
;Layer height: 0.2
;MINX:-47.024
;MINY:-47.02
;MINZ:0.3
;MAXX:47.026
;MAXY:47.03
;MAXZ:61.3
;Generated with Cura_SteamEngine main
T0
M190 S90
M104 S240
M109 S240
M82 ;absolute extrusion mode
G80
G28 ;Home
G1 Z15.0 F6000 ;Move the platform down 15mm
;Prime the extruder
G92 E0
G1 F200 E3
G92 E0

As you can see the heaters get triggered before the machine setting Gcode is executed.

Phaedrux

In order to have Cura move the temp commands later in the file you would have to add some placeholder tokens to your start gcode.

http://files.fieldofview.com/cura/Replacement_Patterns.html

When it parses your start gcode and sees you are using temp commands it will stop adding its own temp commands to the start of the file.

CNCModeller

@gloomyandy said in Cura & RRF Power Supply (M80):

@cncmodeller Perhaps you could place your M80 in a start.g file, I think that gets run before any of the gcode in the file being printed....

For completeness this approach works great.

I also have a M81 S1 in my stop.g to shut off power after a print has been completed.

Thanks All,
Barry M