Is G-code read line by line?












5














I am trying to add the line




G4 P4000 G1 F4000 E-50




to pause and retract the print in order for the printed line to dry (printing in mid air vertically). Does the above code work or should i skip lines or does it not matter at all?




G4 P4000

G1 F4000 E-50




Would the following line do the exact same thing?




G4 P5000 E-50











share|improve this question




















  • 1




    Basically, only one "Gx" command per line. Everything following is a parameter list modifying the command.
    – Carl Witthoft
    Nov 14 '18 at 16:50






  • 1




    Maybe you should update the question to explain what you exactly want to do, e.g. do you want to change to another filament, e.g. do you pause to retract during the pause? As it stands now the print pauses, you retract the filament after the pause and then the print continues without filament when inserted in between the code lines. Please explain where the pause is taking place.
    – 0scar
    Nov 14 '18 at 20:16








  • 1




    Please edit your question to include the requested information!
    – 0scar
    Nov 16 '18 at 13:20










  • Thank you @0scar i have clarified.
    – Arthur Mamou-Mani
    Nov 16 '18 at 16:22
















5














I am trying to add the line




G4 P4000 G1 F4000 E-50




to pause and retract the print in order for the printed line to dry (printing in mid air vertically). Does the above code work or should i skip lines or does it not matter at all?




G4 P4000

G1 F4000 E-50




Would the following line do the exact same thing?




G4 P5000 E-50











share|improve this question




















  • 1




    Basically, only one "Gx" command per line. Everything following is a parameter list modifying the command.
    – Carl Witthoft
    Nov 14 '18 at 16:50






  • 1




    Maybe you should update the question to explain what you exactly want to do, e.g. do you want to change to another filament, e.g. do you pause to retract during the pause? As it stands now the print pauses, you retract the filament after the pause and then the print continues without filament when inserted in between the code lines. Please explain where the pause is taking place.
    – 0scar
    Nov 14 '18 at 20:16








  • 1




    Please edit your question to include the requested information!
    – 0scar
    Nov 16 '18 at 13:20










  • Thank you @0scar i have clarified.
    – Arthur Mamou-Mani
    Nov 16 '18 at 16:22














5












5








5







I am trying to add the line




G4 P4000 G1 F4000 E-50




to pause and retract the print in order for the printed line to dry (printing in mid air vertically). Does the above code work or should i skip lines or does it not matter at all?




G4 P4000

G1 F4000 E-50




Would the following line do the exact same thing?




G4 P5000 E-50











share|improve this question















I am trying to add the line




G4 P4000 G1 F4000 E-50




to pause and retract the print in order for the printed line to dry (printing in mid air vertically). Does the above code work or should i skip lines or does it not matter at all?




G4 P4000

G1 F4000 E-50




Would the following line do the exact same thing?




G4 P5000 E-50








g-code






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 16 '18 at 16:22

























asked Nov 14 '18 at 15:40









Arthur Mamou-Mani

1566




1566








  • 1




    Basically, only one "Gx" command per line. Everything following is a parameter list modifying the command.
    – Carl Witthoft
    Nov 14 '18 at 16:50






  • 1




    Maybe you should update the question to explain what you exactly want to do, e.g. do you want to change to another filament, e.g. do you pause to retract during the pause? As it stands now the print pauses, you retract the filament after the pause and then the print continues without filament when inserted in between the code lines. Please explain where the pause is taking place.
    – 0scar
    Nov 14 '18 at 20:16








  • 1




    Please edit your question to include the requested information!
    – 0scar
    Nov 16 '18 at 13:20










  • Thank you @0scar i have clarified.
    – Arthur Mamou-Mani
    Nov 16 '18 at 16:22














  • 1




    Basically, only one "Gx" command per line. Everything following is a parameter list modifying the command.
    – Carl Witthoft
    Nov 14 '18 at 16:50






  • 1




    Maybe you should update the question to explain what you exactly want to do, e.g. do you want to change to another filament, e.g. do you pause to retract during the pause? As it stands now the print pauses, you retract the filament after the pause and then the print continues without filament when inserted in between the code lines. Please explain where the pause is taking place.
    – 0scar
    Nov 14 '18 at 20:16








  • 1




    Please edit your question to include the requested information!
    – 0scar
    Nov 16 '18 at 13:20










  • Thank you @0scar i have clarified.
    – Arthur Mamou-Mani
    Nov 16 '18 at 16:22








1




1




Basically, only one "Gx" command per line. Everything following is a parameter list modifying the command.
– Carl Witthoft
Nov 14 '18 at 16:50




Basically, only one "Gx" command per line. Everything following is a parameter list modifying the command.
– Carl Witthoft
Nov 14 '18 at 16:50




1




1




Maybe you should update the question to explain what you exactly want to do, e.g. do you want to change to another filament, e.g. do you pause to retract during the pause? As it stands now the print pauses, you retract the filament after the pause and then the print continues without filament when inserted in between the code lines. Please explain where the pause is taking place.
– 0scar
Nov 14 '18 at 20:16






Maybe you should update the question to explain what you exactly want to do, e.g. do you want to change to another filament, e.g. do you pause to retract during the pause? As it stands now the print pauses, you retract the filament after the pause and then the print continues without filament when inserted in between the code lines. Please explain where the pause is taking place.
– 0scar
Nov 14 '18 at 20:16






1




1




Please edit your question to include the requested information!
– 0scar
Nov 16 '18 at 13:20




Please edit your question to include the requested information!
– 0scar
Nov 16 '18 at 13:20












Thank you @0scar i have clarified.
– Arthur Mamou-Mani
Nov 16 '18 at 16:22




Thank you @0scar i have clarified.
– Arthur Mamou-Mani
Nov 16 '18 at 16:22










2 Answers
2






active

oldest

votes


















7














Yes, G-code is read line by line. G-code is a numerical control programming language. It basically instructs the machine sequentially line by line to do a specific task. The printer than executes the lines one by one until it reaches the end.



If you instruct the printer to wait (G4 dwell), it will do the wait/dwell first and than will execute the next command to retract the filament. As such, your examples will not work if you want to retract the filament during the pause, you reversed the process if you want to achieve that.



To add a pause (simple) for e.g. filament changing, you should instruct the head to go to a certain position, extract the filament, and now insert the pause/dwell command. Give yourself enough time to insert and prime the nozzle and go back to the last location to continue printing.



You could insert something like (e.g. in between layer change, before G1 Zx.xx):



...
G1 X0 Y0 F2000 ; Relocate the print head
G1 F4000 E-50 ; Retract filament
G4 P40000 ; Wait for 40 seconds
G92 E50 ; The new filament should continue at this value
...
G1 Zx.xx


Depending on what happens after G1 Zx.xx, you may need to set the head back to the location prior to where it was before G1 X0 Y0 F2000.



Do note that there are pausing scripts/plugins available for e.g. Ultimaker Cura, and there is also a filament changing command M600 that can be enabled for certain firmware (if this is your ultimate goal).



Using a post processing plugin of Ultimaker Cura, a pausing script looks like:




...
G0 X137.692 Y105
;TIME_ELAPSED:707.873599
;TYPE:CUSTOM;added code by post processing
;script: PauseAtHeight.py
;current z: 5
;current height: 5.0
M83
G1 F300 Z6
G1 F9000 X190 Y190
G1 F300 Z15
M104 S0; standby temperature
M0;Do the actual pause
M109 S200; resume temperature
G1 F300 Z6
G1 F9000 X133.423 Y105
G1 F9000
M82
G92 E911.50045
;LAYER:24
G0 X137.692 Y105 Z5
...


Note that G0 and G1 are "move to" location instructions (albeit through a different way, fast move and linear move respectively). If you look closely, you see that after the pause, the printer returns to the X-Y position where it left prior to the pause (X137.692 Y105).





Side note:

Some firmware flavors allow buffering, but each statement is executed sequentially.






share|improve this answer























  • As you rightly state, G0 and G01 are not quite the same thing... G0 means linear interpolation at the rapid rate, whereas G01 means linear interpolation at the feed rate. the OP would need G01 (at the feed rate).
    – user77232
    Nov 15 '18 at 14:11





















4














This needs to be on two lines like in your second example:




G4 P4000

G1 F4000 E-50




See the RepRap Gcode Wiki for more info. https://reprap.org/wiki/G-code



EDIT: if you actually want to retract and THEN pause, reverse it:




G1 F4000 E-50

G4 P4000







share|improve this answer



















  • 3




    That will not work, G1 is executed after the waiting time, so now it waits, extracts filament and immediately continue, you should do it the other way around.
    – 0scar
    Nov 14 '18 at 16:10






  • 3




    Strictly speaking you are right (wait and retract), but it would be useless if the printer continues afterwards without filament after this procedure. I guess the OP needs to explain what the goal of this sequence is and where it is located in his code.
    – 0scar
    Nov 14 '18 at 20:25






  • 1




    Thanks, edited.
    – Davo
    Nov 15 '18 at 14:37











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2 Answers
2






active

oldest

votes








2 Answers
2






active

oldest

votes









active

oldest

votes






active

oldest

votes









7














Yes, G-code is read line by line. G-code is a numerical control programming language. It basically instructs the machine sequentially line by line to do a specific task. The printer than executes the lines one by one until it reaches the end.



If you instruct the printer to wait (G4 dwell), it will do the wait/dwell first and than will execute the next command to retract the filament. As such, your examples will not work if you want to retract the filament during the pause, you reversed the process if you want to achieve that.



To add a pause (simple) for e.g. filament changing, you should instruct the head to go to a certain position, extract the filament, and now insert the pause/dwell command. Give yourself enough time to insert and prime the nozzle and go back to the last location to continue printing.



You could insert something like (e.g. in between layer change, before G1 Zx.xx):



...
G1 X0 Y0 F2000 ; Relocate the print head
G1 F4000 E-50 ; Retract filament
G4 P40000 ; Wait for 40 seconds
G92 E50 ; The new filament should continue at this value
...
G1 Zx.xx


Depending on what happens after G1 Zx.xx, you may need to set the head back to the location prior to where it was before G1 X0 Y0 F2000.



Do note that there are pausing scripts/plugins available for e.g. Ultimaker Cura, and there is also a filament changing command M600 that can be enabled for certain firmware (if this is your ultimate goal).



Using a post processing plugin of Ultimaker Cura, a pausing script looks like:




...
G0 X137.692 Y105
;TIME_ELAPSED:707.873599
;TYPE:CUSTOM;added code by post processing
;script: PauseAtHeight.py
;current z: 5
;current height: 5.0
M83
G1 F300 Z6
G1 F9000 X190 Y190
G1 F300 Z15
M104 S0; standby temperature
M0;Do the actual pause
M109 S200; resume temperature
G1 F300 Z6
G1 F9000 X133.423 Y105
G1 F9000
M82
G92 E911.50045
;LAYER:24
G0 X137.692 Y105 Z5
...


Note that G0 and G1 are "move to" location instructions (albeit through a different way, fast move and linear move respectively). If you look closely, you see that after the pause, the printer returns to the X-Y position where it left prior to the pause (X137.692 Y105).





Side note:

Some firmware flavors allow buffering, but each statement is executed sequentially.






share|improve this answer























  • As you rightly state, G0 and G01 are not quite the same thing... G0 means linear interpolation at the rapid rate, whereas G01 means linear interpolation at the feed rate. the OP would need G01 (at the feed rate).
    – user77232
    Nov 15 '18 at 14:11


















7














Yes, G-code is read line by line. G-code is a numerical control programming language. It basically instructs the machine sequentially line by line to do a specific task. The printer than executes the lines one by one until it reaches the end.



If you instruct the printer to wait (G4 dwell), it will do the wait/dwell first and than will execute the next command to retract the filament. As such, your examples will not work if you want to retract the filament during the pause, you reversed the process if you want to achieve that.



To add a pause (simple) for e.g. filament changing, you should instruct the head to go to a certain position, extract the filament, and now insert the pause/dwell command. Give yourself enough time to insert and prime the nozzle and go back to the last location to continue printing.



You could insert something like (e.g. in between layer change, before G1 Zx.xx):



...
G1 X0 Y0 F2000 ; Relocate the print head
G1 F4000 E-50 ; Retract filament
G4 P40000 ; Wait for 40 seconds
G92 E50 ; The new filament should continue at this value
...
G1 Zx.xx


Depending on what happens after G1 Zx.xx, you may need to set the head back to the location prior to where it was before G1 X0 Y0 F2000.



Do note that there are pausing scripts/plugins available for e.g. Ultimaker Cura, and there is also a filament changing command M600 that can be enabled for certain firmware (if this is your ultimate goal).



Using a post processing plugin of Ultimaker Cura, a pausing script looks like:




...
G0 X137.692 Y105
;TIME_ELAPSED:707.873599
;TYPE:CUSTOM;added code by post processing
;script: PauseAtHeight.py
;current z: 5
;current height: 5.0
M83
G1 F300 Z6
G1 F9000 X190 Y190
G1 F300 Z15
M104 S0; standby temperature
M0;Do the actual pause
M109 S200; resume temperature
G1 F300 Z6
G1 F9000 X133.423 Y105
G1 F9000
M82
G92 E911.50045
;LAYER:24
G0 X137.692 Y105 Z5
...


Note that G0 and G1 are "move to" location instructions (albeit through a different way, fast move and linear move respectively). If you look closely, you see that after the pause, the printer returns to the X-Y position where it left prior to the pause (X137.692 Y105).





Side note:

Some firmware flavors allow buffering, but each statement is executed sequentially.






share|improve this answer























  • As you rightly state, G0 and G01 are not quite the same thing... G0 means linear interpolation at the rapid rate, whereas G01 means linear interpolation at the feed rate. the OP would need G01 (at the feed rate).
    – user77232
    Nov 15 '18 at 14:11
















7












7








7






Yes, G-code is read line by line. G-code is a numerical control programming language. It basically instructs the machine sequentially line by line to do a specific task. The printer than executes the lines one by one until it reaches the end.



If you instruct the printer to wait (G4 dwell), it will do the wait/dwell first and than will execute the next command to retract the filament. As such, your examples will not work if you want to retract the filament during the pause, you reversed the process if you want to achieve that.



To add a pause (simple) for e.g. filament changing, you should instruct the head to go to a certain position, extract the filament, and now insert the pause/dwell command. Give yourself enough time to insert and prime the nozzle and go back to the last location to continue printing.



You could insert something like (e.g. in between layer change, before G1 Zx.xx):



...
G1 X0 Y0 F2000 ; Relocate the print head
G1 F4000 E-50 ; Retract filament
G4 P40000 ; Wait for 40 seconds
G92 E50 ; The new filament should continue at this value
...
G1 Zx.xx


Depending on what happens after G1 Zx.xx, you may need to set the head back to the location prior to where it was before G1 X0 Y0 F2000.



Do note that there are pausing scripts/plugins available for e.g. Ultimaker Cura, and there is also a filament changing command M600 that can be enabled for certain firmware (if this is your ultimate goal).



Using a post processing plugin of Ultimaker Cura, a pausing script looks like:




...
G0 X137.692 Y105
;TIME_ELAPSED:707.873599
;TYPE:CUSTOM;added code by post processing
;script: PauseAtHeight.py
;current z: 5
;current height: 5.0
M83
G1 F300 Z6
G1 F9000 X190 Y190
G1 F300 Z15
M104 S0; standby temperature
M0;Do the actual pause
M109 S200; resume temperature
G1 F300 Z6
G1 F9000 X133.423 Y105
G1 F9000
M82
G92 E911.50045
;LAYER:24
G0 X137.692 Y105 Z5
...


Note that G0 and G1 are "move to" location instructions (albeit through a different way, fast move and linear move respectively). If you look closely, you see that after the pause, the printer returns to the X-Y position where it left prior to the pause (X137.692 Y105).





Side note:

Some firmware flavors allow buffering, but each statement is executed sequentially.






share|improve this answer














Yes, G-code is read line by line. G-code is a numerical control programming language. It basically instructs the machine sequentially line by line to do a specific task. The printer than executes the lines one by one until it reaches the end.



If you instruct the printer to wait (G4 dwell), it will do the wait/dwell first and than will execute the next command to retract the filament. As such, your examples will not work if you want to retract the filament during the pause, you reversed the process if you want to achieve that.



To add a pause (simple) for e.g. filament changing, you should instruct the head to go to a certain position, extract the filament, and now insert the pause/dwell command. Give yourself enough time to insert and prime the nozzle and go back to the last location to continue printing.



You could insert something like (e.g. in between layer change, before G1 Zx.xx):



...
G1 X0 Y0 F2000 ; Relocate the print head
G1 F4000 E-50 ; Retract filament
G4 P40000 ; Wait for 40 seconds
G92 E50 ; The new filament should continue at this value
...
G1 Zx.xx


Depending on what happens after G1 Zx.xx, you may need to set the head back to the location prior to where it was before G1 X0 Y0 F2000.



Do note that there are pausing scripts/plugins available for e.g. Ultimaker Cura, and there is also a filament changing command M600 that can be enabled for certain firmware (if this is your ultimate goal).



Using a post processing plugin of Ultimaker Cura, a pausing script looks like:




...
G0 X137.692 Y105
;TIME_ELAPSED:707.873599
;TYPE:CUSTOM;added code by post processing
;script: PauseAtHeight.py
;current z: 5
;current height: 5.0
M83
G1 F300 Z6
G1 F9000 X190 Y190
G1 F300 Z15
M104 S0; standby temperature
M0;Do the actual pause
M109 S200; resume temperature
G1 F300 Z6
G1 F9000 X133.423 Y105
G1 F9000
M82
G92 E911.50045
;LAYER:24
G0 X137.692 Y105 Z5
...


Note that G0 and G1 are "move to" location instructions (albeit through a different way, fast move and linear move respectively). If you look closely, you see that after the pause, the printer returns to the X-Y position where it left prior to the pause (X137.692 Y105).





Side note:

Some firmware flavors allow buffering, but each statement is executed sequentially.







share|improve this answer














share|improve this answer



share|improve this answer








edited Dec 13 '18 at 6:59

























answered Nov 14 '18 at 16:07









0scar

9,81321242




9,81321242












  • As you rightly state, G0 and G01 are not quite the same thing... G0 means linear interpolation at the rapid rate, whereas G01 means linear interpolation at the feed rate. the OP would need G01 (at the feed rate).
    – user77232
    Nov 15 '18 at 14:11




















  • As you rightly state, G0 and G01 are not quite the same thing... G0 means linear interpolation at the rapid rate, whereas G01 means linear interpolation at the feed rate. the OP would need G01 (at the feed rate).
    – user77232
    Nov 15 '18 at 14:11


















As you rightly state, G0 and G01 are not quite the same thing... G0 means linear interpolation at the rapid rate, whereas G01 means linear interpolation at the feed rate. the OP would need G01 (at the feed rate).
– user77232
Nov 15 '18 at 14:11






As you rightly state, G0 and G01 are not quite the same thing... G0 means linear interpolation at the rapid rate, whereas G01 means linear interpolation at the feed rate. the OP would need G01 (at the feed rate).
– user77232
Nov 15 '18 at 14:11













4














This needs to be on two lines like in your second example:




G4 P4000

G1 F4000 E-50




See the RepRap Gcode Wiki for more info. https://reprap.org/wiki/G-code



EDIT: if you actually want to retract and THEN pause, reverse it:




G1 F4000 E-50

G4 P4000







share|improve this answer



















  • 3




    That will not work, G1 is executed after the waiting time, so now it waits, extracts filament and immediately continue, you should do it the other way around.
    – 0scar
    Nov 14 '18 at 16:10






  • 3




    Strictly speaking you are right (wait and retract), but it would be useless if the printer continues afterwards without filament after this procedure. I guess the OP needs to explain what the goal of this sequence is and where it is located in his code.
    – 0scar
    Nov 14 '18 at 20:25






  • 1




    Thanks, edited.
    – Davo
    Nov 15 '18 at 14:37
















4














This needs to be on two lines like in your second example:




G4 P4000

G1 F4000 E-50




See the RepRap Gcode Wiki for more info. https://reprap.org/wiki/G-code



EDIT: if you actually want to retract and THEN pause, reverse it:




G1 F4000 E-50

G4 P4000







share|improve this answer



















  • 3




    That will not work, G1 is executed after the waiting time, so now it waits, extracts filament and immediately continue, you should do it the other way around.
    – 0scar
    Nov 14 '18 at 16:10






  • 3




    Strictly speaking you are right (wait and retract), but it would be useless if the printer continues afterwards without filament after this procedure. I guess the OP needs to explain what the goal of this sequence is and where it is located in his code.
    – 0scar
    Nov 14 '18 at 20:25






  • 1




    Thanks, edited.
    – Davo
    Nov 15 '18 at 14:37














4












4








4






This needs to be on two lines like in your second example:




G4 P4000

G1 F4000 E-50




See the RepRap Gcode Wiki for more info. https://reprap.org/wiki/G-code



EDIT: if you actually want to retract and THEN pause, reverse it:




G1 F4000 E-50

G4 P4000







share|improve this answer














This needs to be on two lines like in your second example:




G4 P4000

G1 F4000 E-50




See the RepRap Gcode Wiki for more info. https://reprap.org/wiki/G-code



EDIT: if you actually want to retract and THEN pause, reverse it:




G1 F4000 E-50

G4 P4000








share|improve this answer














share|improve this answer



share|improve this answer








edited Nov 15 '18 at 14:35

























answered Nov 14 '18 at 16:03









Davo

1,5311418




1,5311418








  • 3




    That will not work, G1 is executed after the waiting time, so now it waits, extracts filament and immediately continue, you should do it the other way around.
    – 0scar
    Nov 14 '18 at 16:10






  • 3




    Strictly speaking you are right (wait and retract), but it would be useless if the printer continues afterwards without filament after this procedure. I guess the OP needs to explain what the goal of this sequence is and where it is located in his code.
    – 0scar
    Nov 14 '18 at 20:25






  • 1




    Thanks, edited.
    – Davo
    Nov 15 '18 at 14:37














  • 3




    That will not work, G1 is executed after the waiting time, so now it waits, extracts filament and immediately continue, you should do it the other way around.
    – 0scar
    Nov 14 '18 at 16:10






  • 3




    Strictly speaking you are right (wait and retract), but it would be useless if the printer continues afterwards without filament after this procedure. I guess the OP needs to explain what the goal of this sequence is and where it is located in his code.
    – 0scar
    Nov 14 '18 at 20:25






  • 1




    Thanks, edited.
    – Davo
    Nov 15 '18 at 14:37








3




3




That will not work, G1 is executed after the waiting time, so now it waits, extracts filament and immediately continue, you should do it the other way around.
– 0scar
Nov 14 '18 at 16:10




That will not work, G1 is executed after the waiting time, so now it waits, extracts filament and immediately continue, you should do it the other way around.
– 0scar
Nov 14 '18 at 16:10




3




3




Strictly speaking you are right (wait and retract), but it would be useless if the printer continues afterwards without filament after this procedure. I guess the OP needs to explain what the goal of this sequence is and where it is located in his code.
– 0scar
Nov 14 '18 at 20:25




Strictly speaking you are right (wait and retract), but it would be useless if the printer continues afterwards without filament after this procedure. I guess the OP needs to explain what the goal of this sequence is and where it is located in his code.
– 0scar
Nov 14 '18 at 20:25




1




1




Thanks, edited.
– Davo
Nov 15 '18 at 14:37




Thanks, edited.
– Davo
Nov 15 '18 at 14:37


















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