Z-axis up without homing macro

fcwilt

@silver1882 said in Z-axis up without homing macro:

If I am away from my house and I have to cancel the print because of a problem my printer is no longer homed. I just wanted to be able to raise the head so it doesn't cool down setting on the part.

Why do you think canceling a print un-homes the printer?

Phaedrux

It would depend on what you have in cancel.g I think.

fcwilt

@phaedrux said in Z-axis up without homing macro:

It would depend on what you have in cancel.g I think.

Well yes that certainly could happen.

Though why there would be something in the file to do that escapes me at the moment. I haven't found any reason to date to do something that would un-home the printer.

Curious.

Phaedrux

For instance in my cancel.g I home XY and then turn the motors off.

fcwilt

@phaedrux said in Z-axis up without homing macro:

For instance in my cancel.g I home XY and then turn the motors off.

Why do you turn the motors off?

For me most times a canceled print is quickly followed by another attempt after an appropriate change or two.

Frederick

Phaedrux

I suppose just for noise. To start another print it would be re-homing anyway, and depending on why and when it was canceled it might be awhile before another attempt is made.

fcwilt

@phaedrux said in Z-axis up without homing macro:

I suppose just for noise. To start another print it would be re-homing anyway, and depending on why and when it was canceled it might be awhile before another attempt is made.

Noise?

Do your steppers make noise when not moving?

Frederick

Phaedrux

Yeah there's a slight hum/whine when energized. Nothing too offensive. When I was setting up the macros I figured why not power them off?

fcwilt

@phaedrux said in Z-axis up without homing macro:

Yeah there's a slight hum/whine when energized. Nothing too offensive. When I was setting up the macros I figured why not power them off?

Evidence that great minds don't always think alike.

Frederick

Phaedrux

@fcwilt

; cancel.g
;
; Run when the print is paused, and then canceled.
;

G10 P0 R0 S0		; Set hotend temp to 0
M140 S0			; Set bed temp to 0
M106 S255 		; Fan at 100 to cool nozzle and bed
M220 S100		; Set speed factor back to 100% in case it was changed
M221 S100		; Set extrusion factor back to 100% in case it was changed
M290 R0 S0 ; clear babystepping
M204 P1000 T4000	; Set printing and travel accelerations
M566 X900 Y900 Z30 	; Set maximum instantaneous speed changes (mm/min) (Jerk)
G28 XY			; home XY
M98 P"0:/sys/CurrentsNormal.g" ; return motor currents to normal
M98 P"0:/sys/ZSpeedsNormal.g" ; return Z axis speeds to normal
M84			; turn off steppers
G4 S60			; wait 1 minute for nozzle to cool
M107			; turn off the fan
M98 P"0:/macros/Musical Tunes/TwoBits.g" ; play a tune

I suppose now with conditional gcode the homing at the start of a print could easily be made optional, so the logic of turning off the motors since I need to re-home anyway isn't as valid.