Extruder not heating soon enough

gratefulfrog

Hello again,

I've run into another issue with the firmware version 19.2.

When my print starts, for some reason the extruder does not heat up until after all the preliminary instructions are executed. That means that it cannot extrude even though the extruding instructions are being exeucted.

This was not the case prior to version 19.

My preliminary code is :

[[gcode]]
M107
M190 S57                                               ; set bed temperature
G10 P0 S195 R-273					; Set tool 0 operating and standby temperatures
G28								; home all axes 
G32								; execute bed Z-plane  compensation at bed.g 4 points
M83								; set extruder to relative mode
T0									; select tool ZERO

G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
G1 E-3.50000 F2400.00000
G1 Z0.300 F9000.000
G1 X21.521 Y45.215 F9000.000

Any thoughts?

Thanks again!
Ciao,
Bob

dc42

Either add M116 after the T0 command in your slicer start gcode, or add M116 to your tpost0.g file.

gratefulfrog

Thanks! I'll let you know if there's any more issues!

Cheers!
Bob

gratefulfrog

Although that did prevent the print from starting before the head was hot, it did not produce optimal performance since the head does not start to heat until the very end of the prologue code, thus causing a long pause for nothing..

In the past, the head started to heat at the beginning, I guess when the G10 P0 S195 R-273 was read, thus heating while the homing and leveling was going on.

Would there be any way to get the head to heat while the bed is heating?

dc42

Yes, change the M190 command to M140. Also put the T0 command before the G28 if you want to start the extruder heating before homing.