@fcwilt Yes, it is working.
Yes, I am looking for the least amount of extrusion.
What will happen if I do not insert F in the code?

I am using Sandbox(cooltool CNC) for controlling the rotating speed of a stepper motor.
I have been using a motor with Y port and using the code below. But, the speed was so slow for my purpose(1rpm).

1. I want to control the speed[maximum rpm(10rpm) of the motor, 50% speed of the rpm(10rpm) of the motor].
   How can I edit my code to control it? What are the errors and unnecessary lines in my code?

2. If I use a motor with Z port, how may I modify the code?

Code:
(2712);
G90 G94 G21;
(PROFILE);
M5;
S2250 M3;
G0 X0.0 Y0.0 Z0.0 A0.0;
G1 Y25.0 F1 A90000;
M5;
M30;

@deckingman Thanks a ton, sir

@fcwilt I see. thanks a lot for your explanation

@fcwilt So, is that like this?
G21 ; set units to millimeters
M104 S200 ; set temperature
M106

M109 S200 ; wait for temperature to be reached
G90 ; use absolute coordinates
G92 E0
M83

G1 M203 I1 E15.00000 F2.000

G92 E0

M107
M104 S0
M107
G91
G90

@phaedrux I want to make fiber from that not any 3D printed object

@phaedrux I just need to extrude the filament; in that time the nozzle will not move to any axis.

And, the rate of the extrusion will be the least

@phaedrux thanks for the answer. But, I am expecting the ''lowest'' extrusion rate from the nozzle which will run for 30min without moving. May I have your suggestion on that?

@fcwilt Hi, is there any modification of code to make the extrusion to the slowest speed?

G21 ; set units to millimeters
M104 S200 ; set temperature
M106

M109 S200 ; wait for temperature to be reached
G90 ; use absolute coordinates
G92 E0
M83

G1 E12.00000 F2.000

G92 E0

M107
M104 S0
M107
G91
G90

@fcwilt Thank you

@boa Sorry, I did not understand while posting. However, thanks a lot for your answer. It is working